3 Other operating modes of the G-18.mft - NRI

Technical Documentation 

01.06 GS/Bur/WMe/ds 

Edition 1.1 

BA.G18MFTAS-GB 

CRANE 

Electronic coin validator 

G-18.mft 

with vending machine control system for 1-5-chute machines 

Operating instructions 

National Rejectors, Inc. GmbH • Zum Fruchthof 6 • D-21614 Buxtehude 

Phone: +49 (0)4161-729-0 • Fax: +49 (0)4161-729-115 • E-mail: info@nri.de • Internet: www.nri.de

G-18.mft with vending machine control system TABLE OF CONTENTS 

Table of contents 

1 General information 7 

General information about these instructions 7 

General information about the coin validator 8 

Advantages 9 

Scope of delivery 9 

2 Safety instructions 10 

Proper use 10 

Protecting yourself and equipment 11 

3 Other operating modes of the G-18.mft 12 

Parallel operation 12 

Coin validator operation 12 

Totalizer operation 12 

Serial operation 13 

Slave coin validator operation 13 

Master operation 13 

4 Design 14 

The coin validator 14 

Return lever 15 

Switching blocks (on coin validator) 16 

Function assignment of the DIL switches 17 

Light-emitting diode (on coin validator) 18 

Interfaces (on coin validator) 19 

Interfaces 8/6 – additional control PCB (6-/14-pole) 19 

Interface 5 – MDB periphery (10-pole) 19 

Interface 10 – configuration (WinEMP/PalmEMP) 19 

Label 20 

The additional control PCB 21 

Interfaces (additional control PCB) 21 

Button and switches (additional control PCB) 21 

Pilot lights (vending machine door) 22 

National Rejectors, Inc. GmbH, Buxtehude 

3

TABLE OF CONTENTS G-18.mft with vending machine control system 

5 Functions 23 

Coin acceptance 23 

Coin channels and memory blocks 24 

Accepted coin sensors 25 

Prices 25 

Sale 25 

"Battery empty" detection 26 

Inhibiting of specific coin types 26 

Teach mode (optional) 26 

Communication with MDB periphery (optional) 26 

6 Starting up 27 

Starting up in the vending machine 27 

Install coin validator and additional control PCB 27 

Perform test run 30 

Set the prices 31 

Set exact price or overpay mode 

Connecting the device environment of the 

32 

PC programming station (WinEMP) 33 

Connecting the Palm handheld (PalmEMP) 33 

7 Operation 34 

Inhibiting coins 34 

Selecting memory block 36 

Disabling price and test switches/button 36 

Teaching coin channels in teach mode (optional) 37 

8 Maintenance and service 40 

Cleaning coin validator 40 

Displaying battery voltage 

Testing escrow, selection buttons, product ejectors, 

41 

motorized return mechanism manually 

Status and error messages of the pilot lights in the 

42 

machine door 43 

Troubleshooting 44 

4 National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system TABLE OF CONTENTS 

9 Which functions can be set using WinEMP/ 

PalmEMP? 46 

10 Technical data 47 

CE certification 48 

Mounting dimensions 49 

Front view 49 

Rear view 49 

Top view 49 

Pin assignment and connection diagrams for ... 50 

... Product ejectors 1–5 50 

... Escrow 50 

... Motorized return mechanism 50 

... Battery 

... Selection buttons, pilot lights, return button 

50 

(vending machine door) 51 

... MDB periphery (10-pole) 51 

Accessories 52 

Configuration software 52 

Update software 53 

GeldKarte card reader and display 53 

Index 54 

Glossary 59 


5

G-18.mft with vending machine control system GENERAL INFORMATION 

1 General information 

This chapter should provide a general overview of the advantages and 

options regarding the coin validator G-18.mft with a vending machine control 

system for 1-5-chute machines. The first section, however, is designed to 

help you navigate easily within these operating instructions. 

General information about these instructions 

These operating instructions describe the design and operation of the 

electronic coin validator G-18.mft with a vending machine control system for 

1-5-chute machines. Chapters 6 und 7 explain the necessary steps for 

starting up and operating the coin validator. Chapter 8 explains how to clean 

the coin validator and remedy the cause of a malfunction. 

The appended index and glossary reduce the search for specific explanations. 

Since the G-18.mft can be used not only as a vending machine control 

system for 1-5-chute machines but also in other operating modes, these 

operating modes have been briefly described in Chapter 3. You will find a 

detailed description and instructions regarding the use of these operating 

modes in the separate general operating instructions for the G-18.mft. 

To make it easier for you to navigate within these instructions and to operate 

the device, the following accentuations were made in the text: 

• Safety instructions that must be taken into account in order to 

protect operators and equipment have been written in bold and 

provided with the pictogram . 

• Special notes, which are to facilitate the use of the coin validator, have 

been written in italics and also been given a pictogram . 

• Requests to perform an action are numbered in another typeface. 

• At the beginning of a chapter you will find a short "guide", which 

summarizes the content of the chapter. 


7

GENERAL INFORMATION G-18.mft with vending machine control system 

To configure and test the coin validator reference is made to the separate 

documentation of the NRI PC software "WinEMP", of the NRI Palm handheld 

software "PalmEMP" and of the NRI testers (refer also to Chap. 9 "Which 

functions can be set using WinEMP/PalmEMP?"): 

• WinEMP – The configuration and diagnostics program for NRI coin 

validators, operating instructions for the G-18 

• PalmEMP – Operating instructions for configuration of the coin 

validator G-18.mft 

• Tester G-19.0594/4 

If this documentation is not available to you, it can be downloaded 

at any time from the NRI homepage (www.nri.de) in the compressed 

PDF format. 

General information about the coin validator 

The battery-operated and microcomputer-controlled electronic coin validator 

G-18.mft (multi-frequency technology) is the successor model of the 

G-18.2900, whose reliable measuring sensor system and rejection of false 

coins system were taken over and which has been designed in accordance 

with the BDTA standard (Bundesverband Deutscher Tabakwaren-Großhändler 

und Automatenaufsteller) (federal association of German tobacco 

product wholesalers and vending machine installers). 

Because of its printed circuit board, which is protected against moisture and 

high temperature variations, this is the ideal coin validator for power-supplyindependent 

vending machines in outdoor service use. 

To be able to react as quickly as possible to new false coins and to enable 

you to make your individual adjustments, this coin validator can be connected 

to (cp. also section "Accessories" in Chap. 10 "Technical data"): 

• a PC programming station, which consists of the configuration and 

diagnostics software "WinEMP" (including card reader and chip card) 

and an NRI tester. 

• a mobile Palm handheld, on which the NRI program "PalmEMP" has 

been installed, if the coin validator is to be configured on site in the 

vending machine. 

Old coins and new coins being added to a currency that have not been taken 

into consideration at the manufacturer can be programmed on the coin 

validator (optional teach mode). 


G-18.mft with vending machine control system GENERAL INFORMATION 

Advantages 

Scope of delivery 

• Low current consumption 

• Minimum operating voltage of less than 8 V 

• Operating reliability even under extreme environmental conditions 

such as minus temperatures and moisture 

• Acceptance speed of three coins per second 

• Multi-frequency technology for multiple scanning of inserted coins and 

for evaluation of 16 measuring parameters for reliable coin recognition 

• Quick reaction to changing market situations or to new false coins 

ensured by simplified configuration with the help of 

– the PC programming station "WinEMP" for the workshop 

– the Palm handheld software "PalmEMP" directly on the vending 

machine 

• 12 coin channels which can be inhibited individually 

• Integrated wake-up sensor 

• Optional MDB periphery 

• Optional teach mode for teaching up to six different tokens or coin 

types 

• Flash technology for uncomplicated and time-saving coin validator 

operating software updates 

In addition to the coin validator G-18.mft, the following items are delivered to 

you: 

• Additional control PCB for connecting the vending machine 

components such as the battery, escrow, selection buttons, pilot 

lights, product ejectors, and motorized return mechanism 

• 6-pole and 10-pole ribbon cable for connecting the additional control 

PCB to the coin validator 


9

SAFETY INSTRUCTIONS G-18.mft with vending machine control system 

2 Safety instructions 

Proper use 

Before operating the device for the first time, please read these operating 

instructions carefully at least once, and most importantly the safety 

instructions. This is to ensure you have understood the contents of this 

manual as well as how to operate the coin validator. 

The battery-operated coin validators of the G-18.mft series are intended to 

be used in mains-independent power supply 1-5-chute machines for prepacked 

products of uniform shape, such as, e.g., tobacco and telephone 

cards, and are supposed to check the coins inserted into the vending 

machine for specific coin properties as well as control the vending machine 

functions of the escrow, selection buttons, pilot lights, product ejectors and 

coin return. Only use the coin validator for this purpose. Under no 

circumstances can the manufacturer be held liable for any damage or loss 

resulting from improper use of the device. 

These coin validators have been constructed in compliance with the state 

of the art and recognized safety regulations. Nevertheless this equipment 

can be a source of danger. Therefore please observe the following safety 

regulations. 


G-18.mft with vending machine control system SAFETY INSTRUCTIONS 

Protecting yourself and equipment 


The coin validator may only be connected by a qualified 

electrician. 

Only use the coin validator according to proper use. Under no 

circumstances can the manufacturer be held liable for any 

damage or loss resulting from improper use of the device. 

The coin validator PCB is fitted with components that could be 

damaged beyond repair by electrostatic discharge. Please 

observe the handling instructions for components exposed to 

the risk of electrostatic discharge. 

Apply the correct supply voltage to the coin validator (see 

label). 

Ensure the correct potential equalization in the vending 

machine. 

Never pull the connecting cable of the coin validator from the 

additional control PCB when a voltage is applied. 

De-energize the vending machine and coin validator before 

you install, clean or remove the device. 

Contact NRI if you want to alter the construction of the device 

to a greater extent than the modifications described in these 

instructions. 

If the device is no longer required, please dispose of it 

correctly. 

We reserve the right to make technical modifications to the 

device which are not covered by these instructions. 

11

OTHER OPERATING MODES OF THE G-18.MFT G-18.mft with vending machine control system 

3 Other operating modes of the G-18.mft 

Since the G-18.mft can not only be used as a vending machine control 

system for 1-5-chute machines but can also be used in other operating 

modes by setting the switches, this chapter will now provide a brief 

description of the other operating modes. 

The device can work in 

• parallel operation as a 

– standard coin validator 

– 1-price totalizer or 

– 2-price totalizer and in 

• serial operation according to the 

– S1 protocol, 

– BDTA MDB slave protocol or 

– MDB master protocol. 

Parallel operation 

You will find a detailed description and instructions regarding the use 

of these operating modes in the separate general operating 

instructions for the G-18.mft. 

For vending machines with a parallel interface, the coin validator G-18.mft 

can be used in two different operating modes, i.e., as an exclusive coin 

validator or as a totalizer (1-price and 2-price totalizer). 

Coin validator operation 

Totalizer operation 

The G-18.mft is used as an exclusive coin validator whenever coins inserted 

into a vending machine are checked for their properties and are to be 

accepted for sale or rejected and directed into the return area as a result of 

this inspection. 

The G-18.mft is used as a totalizer whenever it is supposed to data-manage 

prices internally in addition to the coin inspection (see above). The G-18.mft 

compares these prices with the total value of the inserted coins. If the credit 

reaches the price, the totalizer uses a price signal to trigger the handing-out 

of the goods by the machine. 

The totalizer can be used as a 1-price totalizer for setting one price or as a 

2-price totalizer for setting two prices. 


G-18.mft with vending machine control system OTHER OPERATING MODES OF THE G-18.MFT 

Serial operation 

For vending machines with a serial interface, the coin validator G-18.mft can 

be used in two different operating modes, i.e., as a slave or as a master. 

Slave coin validator operation 

Master operation 

In slave operation, the G-18.mft is used as an exclusive coin validator. The 

coins inserted into a vending machine are checked for their properties and 

are accepted for sale or rejected and directed into the return area as a result 

of this inspection. 

The communication of the coin validator with the vending machine control 

system is carried out via the MDB protocol or the S1 protocol. Accordingly, 

the vending machine functions as a master and the coin validator as a slave. 

The MDB protocol (MDB = Multi Drop Bus) is used in the case of the 

G-18.mft with BDTA (BDTA = Bundesverband Deutscher Tabakwaren- 

Großhändler und Automatenaufsteller) (federal association of German 

tobacco wholesalers and vending machine installers) restrictions for: 

• voltage supply and 

• battery operation. 

The S1 protocol is an MDB protocol specified for NRI coin validators with 

individual restrictions and commands for: 

• voltage supply and 

• sorting. 

You can obtain further information about the MDB interface and S1 interface 

in the 

• BDTA MDB specification, which is available to you at the BDTA 

• NRI S1 specification for the G-40 S1, which NRI will gladly place at 

your disposal upon your request. 

The G-18.mft is used as a master whenever it is supposed to control 

devices via the MDB protocol in addition to the coin inspection (see above). 

The communication of the coin validator with a card reader, display or other 

external device is carried out via the standard MDB protocol (MDB = Multi 

Drop Bus), with the coin validator functioning as a master and all connected 

devices, such as a card reader or display, functioning as a slave. 

You will find detailed information about the MDB interface in the "NAMA 

document MDB/ICP, 2.0" (www.vending.org). 


13

DESIGN G-18.mft with vending machine control system 

4 Design 

This chapter describes the general design of the coin validator and the 

additional control PCB and also the components that are important for 

operating the device: 

• Return lever, switching blocks, light-emitting diode, interfaces, label 

• Interfaces, button and switches, pilot lights 

The coin validator 

10 

1 Return lever 

2 Coin insert funnel 

3 Switching blocks S1–S3 

4 Mounting studs 

5 MDB interface – optional periphery 

(display, card reader) 

6 Interface – additional control PCB 

7 

4 

4 

Fig. 1a: Design – G-18.mft 

7 Light-emitting diode 

8 Interface – additional control PCB 

9 Coin outlet 

10 Configuration interface – 

PC programming station (WinEMP)/ 

Palm handheld (PalmEMP) 

14 National Rejectors, Inc. GmbH, Buxtehude 

2 

8 

5 

6 

3 

1 

9

G-18.mft with vending machine control system DESIGN 

Return lever 

Coins inserted into the coin validator pass through the coin insert funnel 2 

into the measurement and validation area of the device, where their coin 

properties are compared with the values of the stored acceptance bands. 

Coins rejected by the coin validator are directed into the return area and 

coins accepted for the vending operation leave the device through the coin 

outlet 9, which is located at a fixed position because the coin validator does 

not have a sorting function. (See Fig. 1a) 

The return lever 1 on the top of the coin validator is either directly operated 

mechanically or motor-controlled using the return button on the vending 

machine, if the coins which have already been inserted are to be returned 

or a jam caused by coins, e.g., which have become stuck needs to be 

removed. Operating the return lever opens the measurement and validation 

area of the coin validator so that all objects in the coin validator are 

transported into the return area. (See Fig. 1a) 


15


Switching blocks (on coin validator) 

On the rear of the device, the coin validator is 

equipped with three switching blocks (S1–S3) 3 

located below one another. The two upper switching 

blocks S1 and S2 have eight DIL switches each, 

and the lower block S3 has ten. (See Fig. 1a) 

The 12 available coin channels or the coin types 

assigned to the coin channels can be inhibited 

individually using the first six DIL switches of 

switching blocks S1 and S2 (see section "Inhibiting 

coins" in Chap. 7 "Operation"). 

DIL switch 7 on the switching block S1 is used to determine whether the 

customer will receive his goods if he has a credit that corresponds exactly 

to the price or also if his credit is higher than the set price (see section "Set 

exact price or overpay mode" in Chap. 6 "Starting up"). 

Using the eighth DIL switch of the upper switching block S1, you can disable 

the operating button and operating switches of the additional control PCB 

(see section "Disabling price and test switches/button" in Chap. 7 "Operation"). 

DIL switch 7 on the lower switching block S2 is used to set the coin validator 

into teach mode in order to be able to configure new coins or tokens on site 

without using any additional tools (see section "Teaching coin channels in 

teach mode" in Chap. 7 "Operation"). 

The eighth DIL switch of the middle switching block S2 is used to define the 

operating mode "vending machine control" (see Chap. 6 "Starting up"). 

The DIL switches 1–8 of the lower switching block S3 are not assigned in the 

operating mode "vending machine control". Their switch position is not 

relevant. 

DIL switch 9 of the switching block S3 is used to set the MDB protocol and 

DIL switch 10 is used to select which of the two memory blocks the coin 

validator is to access (see Chap. 6 "Starting up" and section "Selecting 

memory block" in Chap. 7 "Operation"). 


S1 

S2 

S3


Function assignment of the DIL switches 

Switching block S1 

DIL switch off on 

S1.1 Coin channel 1 vacant inhibited 






S1.7 Product sale in case of overpay exact price 

S1.8 Switches/button, additional PCB disabled enabled 



S2.1Coin channel 7 vacant inhibited 






S2.7 Operation normal teach mode 

S2.8 Operation control – 



S3.1not assigned 

S3.2 not assigned 







S3.9 Operation MDB configuration 

S3.10 Memory block 0 1 


S1 

S2 

S3 

S1 

S2 

S3 

S1 

S2 

S3 

17


Light-emitting diode (on coin validator) 

The light-emitting diode (LED) 7 (see Fig. 1a) indicates, on the one hand, the 

voltage state of the battery if the return lever is pressed after a coin has been 

inserted (see section "Displaying battery voltage" in Chap. 8 "Maintenance 

and service"). 

On the other hand, the LED lights up when memory block 0 or 1 is switched 

active (see section "Selecting memory block" in Chap. 7 "Operation"). 



Interfaces (on coin validator) 

On the rear of the coin validator there is a 6-pole 8 and a 14-pole 6 interface 

to the additional control PCB (to the vending machine). At the bottom of the 

device there is a connecting plug 10 for the PC programming station or the 

Palm handheld. Peripheral devices, such as a display or card reader, can 

be connected to the 10-pole MDB interface 5. (See Fig. 1a) 

Interfaces 8/6 – additional control PCB (6-/14-pole) 

These two interfaces are used to connect the coin validator to the additional 

control PCB to which the vending machine components such as the battery, 

escrow, selection buttons, pilot lights, product ejectors, and return 

mechanism are connected (see section "The additional control PCB" in this 

chapter). 

Interface 5 – MDB periphery (10-pole) 

If the G-18.mft is operated as a 1-5-chute vending machine control system, 

use an MDB cable set to connect all slave devices, such as an MDB card 

reader and MDB display to this interface (see section "Accessories" in 

Chap. 10 "Technical data"). 


For further information on the MDB interface, please refer to "NAMA 

document MDB/ICP, 2.0" (www.vending.org). 

For details regarding pin assignment, see section "Pin assignment 

and connection diagrams" in Chap. 10 "Technical data". 

Pin 7 of this interface has been assigned to a wake-up line. The coin validator 

itself is woken up from an energy-saving standby mode by the insertion of 

a coin and then wakes up all connected slave devices via the wake-up line. 

The coin validator is now in its active state and keeps the wake-up line on 

"low" = active (all devices ready for operation) until the inserted coin has 

been processed. 

Interface 10 – configuration (WinEMP/PalmEMP) 

To configure the coin validator the device is connected to a PC or a mobile 

Palm handheld. For that purpose, the G-18.mft is equipped at the bottom 

with a PCB direct plug (see Fig. 1a), which is used to connect the coin 

validator to the PC programming station or to a Palm handheld. The device 

can then be set up using the configuration and diagnostics software 

"WinEMP" or "PalmEMP" (see Chap. 6 "Starting up" and Chap. 9 "Which 

functions can be set using WinEMP/PalmEMP?"). 



19


Label 

The label of the coin validator contains all the data defining the device such 

as the device type and nominal voltage as well as customer-specific default 

values such as the currency, coin types and coin channel data: 

17 

1 

16 

2 3 4 

15 

14 

Fig. 1b: Label – G-18.mft 


13 

5 6 7 8 

1 Channel data – memory block 0 12 Coin outlet , since without sorting 

2 Date of manufacture 

device, always "3" 

3 Currency – memory block 1 

13 Coin signal line , not relevant for 

4 Currency – memory block 2 

5 Channel data – memory block 1 

6 Device type 

7 Data block number 

8 Revision no. for data block download 

9 Nominal voltage 

10 Bar code 

11 Ordering code/order no./ 

consecutive device no. per order number 

G-18.mft with vending machine control 

system 

14 Very narrow coin channel 

15 Narrow coin channel 

16 Normal coin channel 

17 Coin type 

12 

9 

10 

11


The additional control PCB 

7 

8a 8b8c 8d 8e 

Interfaces (additional control PCB) 

On the additional control PCB, there are, in addition to the two interfaces 1a 

and 1b to the coin validator, all the interfaces 4 to 8 to the vending machine 

components that are relevant for the control system (see Fig. 1c). 


Fig. 1c: Design – additional control PCB 

1a Interface (14-pole) – G-18.mft 

1b Interface (6-pole) – G-18.mft 

2 DIL switch 1 (lower) and 

2 (upper) 

3 Button 

4 Interface – escrow 

5 Interface – return mechanism 

6 Interface – battery 



Button and switches (additional control PCB) 

1a 1b 

Button 3 is used to perform an automatic run of the vending machine 

functions such as escrow, selection buttons, pilot lights, product ejectors 

and motorized return mechanism before starting up the device (see Chap. 6 

"Starting up") and to reset the error messages stored in the coin validator 

that inhibit the further acceptance of coins or disable the selection buttons 

(see Chap. 11 "Troubleshooting"). 

The lower of the two DIL switches 2 is used for the manual testing of all 

contacts of the vending functions such as escrow, selection buttons, 

product ejectors and motorized return mechanism (see Chap. 11 

"Troubleshooting"). 

The upper DIL switch can be used to set up to five prices for up to five 

different products (see section "Set the prices" in Chap. 6 "Starting up"). 

6 

7 Interface – selection buttons and pilot 

lights in vending machine door 

8a Interface – product ejector 1 

8b Interface – product ejector 2 

8c Interface – product ejector 3 

8d Interface – product ejector 4 

8e Interface – product ejector 5 

The button and switches can be disabled for normal operation (see 

section "Disabling price and test switches/button in Chap. 7 

"Operation"). 

5 

4 

12 

2 

3 

21


Pilot lights (vending machine door) 

The two pilot lights (LEDs) controlled via the additional PCB (connector 7, 

Fig. 1c) in the vending machine door are supposed to make it easier for the 

customer to operate the vending machine in normal operation. However, 

these LEDs also tell the service technician that there is a malfunction and 

what kind of malfunction it is. Accordingly, the green LED is used during a 

correct selling sequence and the red LED in the event of a malfunction or an 

error during the selling sequence (cp. also section "Status and error 

messages of the pilot lights in the machine door" in Chap. 8 "Maintenance 

and service"): 

green LED flashes, 

as soon as the inserted credit is sufficient for a purchase: 

• in case of setting "exact price“, 

as soon as a set price is reached and the respective chute is not 

empty 

• in case of setting "overpay“, 

as soon as the lowest set price is reached 

red LED flashes, when coins are inserted although the acceptance of coins 

is inhibited, because: 

• credit has already reached the highest set price 

• all chutes are empty or defective 

• malfunction in the escrow 

red LED flashes, when a selection button is pressed, because: 

• in case of setting "exact price", credit is not equal to price 

• in case of setting "overpay", credit is less than the price of the 

selected product 

• chute of the selected product is empty or defective 

green and red LED flash alternately whenever the coin validator is not in the 

normal operating mode but in the service mode instead, so that no coins can 

be accepted in order to generate a credit (e.g. in the test mode or during the 

price-setting operation). 


G-18.mft with vending machine control system FUNCTIONS 

5 Functions 

This chapter describes the functions of the coin validator: 

• Coin acceptance 

• Coin channels and memory blocks 

• Accepted coin sensors 

• Prices 

• Control of the vending machine functions 

• "Battery empty" detection 

• Inhibiting of specific coin types 

• Teach mode (optional) 

• Communication with MDB periphery (optional) 

Only the functions will be described in this chapter. To find out how to change 

adjustable functions, refer to Chap. 7 "Operation" regarding settings made 

directly on the changer, and refer to the separate instructions regarding 

settings made using the configuration software WinEMP or PalmEMP (cp. 

also Chap. 9 "Which functions can be set using WinEMP/PalmEMP?"). 

Coin acceptance 

A coin inserted into the coin validator initially runs past inductive and optical 

sensors for the purpose of an inspection in order to measure its coin 

properties such as the alloy, diameter, mass and minting. An upper limit and 

a lower limit are stored for each programmed coin type, a so-called 

acceptance band, so that the coin validator knows whether to accept a coin 

or not. If the determined measured values of the inserted coin are beyond the 

acceptance band, the coin detected as being a false coin exits the coin 

validator via the coin return area. Otherwise, the acceptance gate opens, 

and after passing the accepted coin sensors, the coin is initially directed into 

the escrow of the vending machine. 

The acceptance bands are programmed by the manufacturer according to 

customer specifications, but they can be changed using the configuration 

software (see Chap. 9 "Which functions can be set using the WinEMP/ 

PalmEMP?"). 


23

FUNCTIONS G-18.mft with vending machine control system 

Coin channels and memory blocks 

For the purpose of coin acceptance, the coin validator possesses 12 "memory 

slots" that can be assigned different coin types or tokens. These "memory 

slots" are termed coin channels. All the coin information that describes the 

processing of an inserted coin is assigned to the coin channels; e.g. the 

acceptance band of a coin type/token so that the coin type/token is accepted 

in that channel. 

To be able to reject false coins reliably, channels with a narrow or even a very 

narrow acceptance band are frequently set up for a coin type, in addition to 

the standard coin channel. The limit values of these coin channels are closer 

to one another so that false coins with similar measured values are rejected. 

Narrow and very narrow coin channels, however, also possess a lower 

acceptance rate. 

In addition, it is possible to allocate coins with different measured values but 

identical coin values to different coin channels. This is how the coin validator 

can, for example, accept old and new coins of the same type. 

However, a coin channel is not only assigned the acceptance band of a coin 

type but also other coin information which defines further processing: e.g. 

coin values and inhibiting information. 

The memory of the coin validator can data-manage two separately 

programmed (memory) blocks 0 and 1 (see section "Label" in Chap. 4 

"Design"). The 12 coin channels can be assigned independently of one 

another to each block with different coin types (also currencies), inhibiting 

information, etc. Only one block can be active at a time and be used for the 

coin measurement and for further coin processing. You can use the 

switching blocks on the rear of the device to select the desired block (see 

section "Selecting memory block" in Chap. 7 "Operation"). 

Since the customer-specific programming made by the manufacturer does 

not allocate all 12 coin channels of memory block 0 and 1 in most cases, 

coin types and the desired further information can be assigned to channels 

that are still free at any time using the configuration software (see Chap. 9 

"Which functions can be set using WinEMP/PalmEMP?"). 

The coin channels 7 to 12 of the two memory blocks are intended for the 

teach mode. New coin types/tokens can be taught in teach mode directly at 

the vending machine without using any further tools (see section "Teaching 

coin channels in teach mode" in Chap. 7 "Operation"). 


G-18.mft with vending machine control system FUNCTIONS 

Accepted coin sensors 

Prices 

Sale 

To ensure that accepted coins actually arrive in the escrow and that coin 

acceptance has not been tampered with, accepted coin sensors located in 

front of the coin outlet check whether the inserted coin drops unhindered into 

the cash-box chute. Only when the coin has passed this checking function 

is the coin considered accepted. 

If the accepted coin sensors are continuously covered, e.g. by a coin jam, 

coin acceptance is inhibited. 

Up to five prices for up to five different products can be set in the coin validator 

(see section "Set the prices" in Chap. 6 "Starting up"). 

All prices are set to EUR 1.00 by the manufacturer. 

Following the acceptance of coins, the coins are initially directed into the 

escrow of the vending machine. Depending whether you select "exact price" 

or "overpay" for the selling sequence (see section "Set exact price or 

overpay function" in Chap. 6 "Starting up"), the product selection is possible 

as soon as 

• the inserted credit amounts exactly to the price of the respective 

product (the credit must not be less than but also not greater than the 

price). 

• the inserted credit amounts to or exceeds one price or several prices. 

(The residual credit is accepted without allowing the customer to 

make another product selection.) 

The green pilot light flashes until the goods are given out via the respective 

product chute by pressing one of the up to five selection buttons. Now the 

accepted coins are directed from the escrow into the cash-box. 

If the chute selected by the customer is empty or defective, the red pilot light 

flashes and the customer can now press the return lever. The coins are then 

directed from the escrow into the return area. The return lever of the coin 

validator can be directly operated mechanically or electrically by means of 

a motor. 


25

FUNCTIONS G-18.mft with vending machine control system 

"Battery empty" detection 

The light-emitting diode on the left-hand side of the coin validator indicates 

the voltage state of the battery when the return lever is pressed following the 

insertion of a coin (see section "Displaying battery voltage" in Chap. 8 

"Maintenance and service"). 

Inhibiting of specific coin types 

If specific coin types are no longer to be accepted for payment at the vending 

machine (e.g. because there are too many false coins of a specific coin type 

in circulation), these coin types can be inhibited using the switching blocks 

on the rear of the coin validator (see section "Inhibiting coins" in Chap. 7 

"Operation"). 

Teach mode (optional) 

The coin validator provides six memory locations (coin channels) for 

configuring a maximum number of six new coins/tokens, which means that 

coin/token measured values can be re-assigned directly on the vending 

machine by inserting the respective coins/tokens. The acceptance band 

generated then accepts these tokens as payment in the vending machine. 

(See section "Teaching coin channels in teach mode" in Chap. 7 "Operation") 

Communication with MDB periphery (optional) 

If the coin validator is supposed to control external devices using the MDB 

protocol, an NRI card reader and NRI display can be connected using the 

10-pole MDB interface on the rear of the device and using an MDB cable set 

(see section "Accessories" in Chap. 10 "Technical data"). 


G-18.mft with vending machine control system STARTING UP 

6 Starting up 

The G-18.mft is either 

• started up in a vending machine, or 

• connected to one of the two NRI software solutions used to configure 

the device: 

– PC programming station (WinEMP) 

– Palm handheld (PalmEMP) 

Starting up in the vending machine 

To start up the device you must: 

• Fasten and connect the coin validator and additional control PCB in 

the vending machine 

• Activate a test run of the vending machine components to be 

controlled 

• Set prices 

• Select "exact price" or "overpay" 

Install coin validator and additional control PCB 

1 Interrupt the voltage supply of the vending machine. 

2 Set DIL switch 9 of the lower switching block S3 to 

the lower position (OFF). 

The MDB protocol for the vending machine control 

system has been selected. 

3 Set DIL switch 8 of the middle switching block S2 

also to the lower position (OFF). 

Master operation for any connected slaves has 

been selected. 

4 Connect both enclosed ribbon cables to the 14-pole 

and 6-pole interfaces (3 and 4, Fig. 2a) of the coin validator. 


If MDB slave devices are to be connected to the coin validator, 

connect the MDB cable set to the 10-pole MDB interface 2 of the 

coin validator (see Fig. 2a). 

5 Hang the coin validator in the vending machine mount using the 

lateral mounting studs 1 (see Fig. 2a). 

27

STARTING UP G-18.mft with vending machine control system 

10 

5 

11a 11b11c 11d 11e 

1 

1 

4 

2 

3 

Fig. 2a: Interfaces on the coin validator 

Fig. 2b: Interfaces on the additional control PCB 

6a 6b 


9 

8 

7 

12


6 Fasten the additional control PCB on its installation plate next to the coin 

validator in the vending machine so that it is easily accessible in the case 

of any service work. 

7 Use both enclosed ribbon cables to connect the coin validator to the 

14-pole and 6-pole coin validator interfaces (6a and 6b, Fig. 2b) of 

the additional control PCB. 

8 Connect the vending machine battery as well as all other vending 

machine components to the additional control PCB (see Fig. 2b): 

– Battery to interface 9 

– Escrow to interface 7 

– Motorized return mechanism to interface 8 

– Selection buttons and pilot lights from vending machine door to 

interface 10 

– 1–5 product ejectors to interfaces 11a–11e 




If necessary, use the MDB cable set to connect the coin validator to 

slave devices. 

9 Restore power supply to the vending machine. 

10 Perform test run (see next section). 

29


Perform test run 

The automatic test run must be performed to ensure that the coin validator 

"learns" and stores which vending machine components were connected 

and must be controlled. Starting from the test run, all interfaces that have not 

been assigned, e.g. only three and not all five product ejector interfaces, are 

considered "not available". In addition, all components driven by a motor are 

moved into their final position or initial position. 

The handing-out of goods is only simulated if the chutes are empty. 

1 Unhook the coin validator and set the eighth 

DIL switch of the upper switching block on 

the rear of the device upward to ON. 

The operating elements on the additional 

control PCB are no longer inhibited and can now be operated. 

2 Hang the coin validator back in the machine. 

3 Insert a coin into the coin validator. 

The coin validator is now in the wake-up mode and no longer in the 

sleep mode. 

4 Press button 3 on the additional control PCB (see Fig. 2c). 

The coin validator is now in the test mode and no longer in the 

operating mode and activates an automatic test run in the following 

order: return mechanism, escrow – return mechanism, escrow – 

cash-box, product ejectors 1–5, green LED, red LED, acoustic signal 

12 

Fig. 2c: Button and switches on the additional control PCB 

5 If the operating elements on the additional control PCB are to be inhibited 

in normal operation, unhook the coin validator again, set the eighth DIL 

switch of the upper switching block S1 downward again (to OFF) and 

hang the coin validator back in the vending machine. 


3


Set the prices 

The up to five prices are set by the manufacturer to EUR 1.00 and can be 

set individually with the help of the upper DIL switch 2 on the additional 

control PCB by inserting a coin (see Fig. 2c): 

1 First unhook the coin validator and set the 

eighth DIL switch of the upper switching 

block on the rear of the device upward to 

ON. 

The operating elements on the additional control PCB are no longer 

inhibited and can now be operated. 


3 Use a pointed object to set the upper DIL switch leftward to ON. 

The flashing green and red LEDs indicate that the coin validator is no 

longer in the operating mode. 

4 Insert coins until their value amounts to the desired price for chute 1. 

Only the coins added by the coin validator drop into the escrow. 

Rejected coins must therefore be inserted again. 


If the wrong coins were inserted, the price-setting operation can be 

interrupted at any time by pressing the return button. 

5 Confirm the price by pressing the selection button for chute 1. 

All evaluated coins are paid out. 

6 Add up the paid-out coins and, to be on the safe side, compare with 

the desired price again. 

If the value is not equivalent to the desired price, not all inserted 

coins were accepted or added. In that case, the price-setting 

operation must be repeated. 

7 Repeat steps 4 to 6 for all installed chutes. 

8 Set the upper DIL switch rightward again (to OFF). 

The LEDs stop flashing. The coin validator is in operating mode 

again. 

9 If the operating elements on the additional control PCB are to be inhibited 

in normal operation, unhook the coin validator again, set the eighth DIL 


hang the coin validator back in the vending machine. 

31


Set exact price or overpay mode 

1 De-energize the coin validator and remove from the vending 

machine. 

2 Set the DIL switch 7 of the upper switching block S1 on the rear of 

the device upward to ON for "exact price" or downward (to OFF) for 

"overpay". 

"Exact price" activated "Overpay" activated 

3 Hang the coin validator back in the machine again and supply with 

voltage. 



Connecting the device environment of the 

PC programming station (WinEMP) 

If you want the G-18.mft to be set on the PC using the diagnostics and 

configuration software WinEMP, the following device environment is 

connected to the PCB direct plug 5 of the coin validator (see Fig. 2a and 

section "Accessories" in Chap. 10 "Technical data"): 

• Tester for voltage supply 

• WinEMP card reader incl. chip card 


Fig. 3: Device environment for WinEMP 

For details on how to connect the device environment to your PC and how 

to operate the software, please refer to the separate documentation for the 

WinEMP software (refer also to Chap. 9 "Which functions can be set using 

WinEMP/PalmEMP?"). 

Prior to making the connection to the programming station, 

the DIL switch S3.9 on the rear of the coin validator must be 

set upward to ON first, since otherwise it will not be possible 

to set up a connection to the PC. 

The WinEMP functions that are relevant for the vending machine 

control system of the G-18.mft are currently being revised. 

Connecting the Palm handheld (PalmEMP) 

"PalmEMP" is an NRI program 

that can be installed as an 

additional application on a 

Palm handheld. Simply use the 

appropriate dongle to connect 

the Palm handheld to the PCB 

direct plug 5 of the coin validator 

(see Fig. 2a and section 

"Accessories" in Chap. 10 

"Technical data"). The coin 

validator remains installed in 

the vending machine. 

The PalmEMP 

functions that are 

relevant for the vending machine control system of the G-18.mft are 

currently being revised. 

33

OPERATION G-18.mft with vending machine control system 

7 Operation 

In this chapter you will find out how to carry out functions and settings, 

directly on the coin validator using the operating elements (switching blocks 

and LEDs), rather than with additional tools. 

• Inhibit coins 

• Select memory block 

• Disable price and test switches/button 

• Display battery voltage 

• Teach coin channels in teach mode (optional) 

Inhibiting coins 

Using the first six DIL switches of the two upper switching blocks S1 and S2, 

each of the 12 coin channels or each coin type assigned to a specific coin 

channel can be inhibited individually, i.e. this coin type is not accepted for 

payment on the vending machine. 

Please refer to the label of the device to see which coin type has been 

assigned to which coin channel by the manufacturer. 

This assignment can be reset at any time using the NRI software 

WinEMP or PalmEMP. 

If all coin types are to be accepted for payment at the vending machine, DIL 

switches 1–6 of the two upper switching blocks S1 and S2 are in the lower 

OFF position. If you want to inhibit a coin channel, you only need to set the 

respective DIL switch upward to ON. 

The 12 DIL switches inhibit the following coin channels: 


G-18.mft with vending machine control system OPERATION 











S2.1Coin channel 7 vacant inhibited 






Example 

(the coin validator is no longer supposed to accept the coin(s) assigned to coin 

channels 3 and 8, which means that coin channels 3 and 8 must be inhibited) 

With the DIL switches in these positions, the coin validator no longer accepts the 

coin type(s) assigned to coin channels 3 and 8! 

To inhibit a coin channel or the coin type assigned to the coin channel: 

1 De-energize the coin validator. 

2 Inhibit the desired coin channels using the DIL switches 1 to 6 of the 

two upper switching blocks S1 and S2 on the rear of the device 

(cp. example above). 

3 Restore the supply voltage of the coin validator. 


If a normal coin channel and a narrow coin channel have been 

programmed on the coin validator for one coin type, the normal coin 

channel must be inhibited as described above in order to activate 

the narrow coin channel. If both channels are activated, the wider 

acceptance band of the normal coin channel is used. 

If the coin type is to be inhibited, both coin channels must be 

inhibited. 

S1 

S2 

S3 

S1 

S2 

S3 

35


Selecting memory block 

The coin validator has two memory blocks, which have been programmed 

according to customer-specific requirements by the manufacturer. The 

data of the two blocks 0 and 1 differs in device operation, e.g. by the 

acceptance of different coin types. If the coin validator is supposed to 

access the other memory and, e.g., accept coin combination 1 instead of 

coin combination 2, DIL switch 10 of the lower switching block S3 on the 

rear of the device can be used to select the correct block. 

To change the memory block: 


2 Set the DIL switch 10 of the lower switching block S3 downward to 

OFF if the coin validator is supposed to access block 0 or upward to 

ON for block 1. 

Block 0 activated Block 1 activated 

The LED on the left side of the coin validator lights up briefly. 


Disabling price and test switches/button 

If the operating elements on the additional control PCB are to be inhibited so 

that they can no longer be operated unintentionally or by anyone, the price 

and test switches/button can be disabled using the upper switching block S1 

on the rear of the device: 


2 Set the DIL switch 8 of the upper switching 

block S1 downward to OFF. 


The operating elements on the additional control PCB are inhibited. 



Teaching coin channels in teach mode (optional) 

Coin channels can also be taught without the configuration software directly 

on the coin validator using the middle switching block S2, which means that 

a coin type or also a token is re-assigned to a coin channel by inserting the 

respective coins/tokens and that the coin validator does not need to be 

removed from the vending machine. It is also possible to widen the 

acceptance band of the selected coin channel when, e.g., only a small 

number of tokens are available. Six coin channels (7 to 12) are available to 

be taught. 


The teach mode is optional. The coin channels must be prepared by 

the manufacturer in order to be able to teach new coins and tokens. 

The middle switching block S2 on the rear of the coin validator is assigned 

in the teach mode as follows: 



S2.1Coin channel 7 – teach 

S2.2 Coin channel 8 – teach 





S2.7 Teach mode switch off switch on 

37


To re-assign a coin type/token to a coin channel, please proceed as follows: 

When you use the middle switching block in normal operation in 

order to inhibit coins remember the current switch settings so that 

you can restore them easily afterwards. 

1 Set DIL switches S2.1–6 downward to OFF. 

2 Set DIL switch S2.7 upward to ON. 

Now the device is in teach mode to teach 

the coin channels. 

3 Enable the coin channel to be taught (7–12, 

here: 9) by setting the appropriate DIL switch 

(S2.1–6, here: S2.3) upward to ON. 

4 Insert at least 10 coins of the new coin type/token into the coin 

validator or vending machine. 

After the 10 th coin has been inserted, the LED on the left-hand side of 

the coin validator lights up briefly. Additional coins can be inserted. 

If the LED does not light up after the 10 th coin has been inserted, 

the inserted coins cannot be used. To abort the operation, first set 

the DIL switch of the respective coin channel (here: S2.3) and then 

S2.7 downward to OFF. 

Now you can save the measured values generated by the inserted coins in 

either a normal (a) or a wide (b) acceptance band. A wide acceptance band 

is only an appropriate choice when you only have a limited selection of coins 

at your disposal for the purpose of teaching tokens and would still like to 

program greater tolerance limits. 

To save with the normal acceptance band: 

5a Set DIL switch S2.7 downward to OFF. 

The LED on the left-hand side of the coin 

validator will light up once if the saving 

operation has been successful and it will 

light up twice if there has been an error during the saving operation. 

To abort the operation, first set the DIL switch of the respective coin 

channel (here: S2.3) and then S2.7 downward to OFF. 



To save with a wide acceptance band: 

5b Set an additional unassigned DIL switch 

(S2.1–6, here: S2.4) upward to ON. 

The acceptance band has been widened. 

Now you can set DIL switch S2.7 downward 

to OFF. 

The LED on the left-hand side of the coin 

validator will light up once if the saving 

operation has been successful and it will light up twice if there has been 

an error during the saving operation. 


To abort the operation, first set the DIL switch of the respective coin 

channel (here: S2.3) and then S2.7 downward to OFF. 

6 Set DIL switch (S2.1–6, here: S2.3) for the 

taught coin channel downward to OFF. 

The new coin type/token will now be 

accepted for payment by the coin validator. 

7 Set DIL switches S2.1–6 back to the desired position for the normal 

operating mode (cp. also section "Inhibiting coins" in this chapter). 

39

MAINTENANCE AND SERVICE G-18.mft with vending machine control system 

8 Maintenance and service 

In this chapter you will out how to 

• clean the G-18.mft, 

• indicate the battery voltage using the light-emitting diodes on the 

validator, 

• test the vending machine components to be controlled manually, 

• interpret status and error messages of the pilot lights in the machine 

door or clear faults, 

• remedy the cause of other malfunctions. 

Cleaning coin validator 

The coin validator must only be wiped clean from time to time with a damp 

cloth (lukewarm water with a small amount of washing-up liquid): Beyond 

that, no further maintenance work is required. 

Under no circumstances may the cloth be so wet that fluid 

runs into the device. Otherwise the PCB will be damaged. 

Do not use any solvents or scouring agents that will attack the 

plastic material of the device. 


2 Carefully open the flight deck 1 on the left-hand side and hold it open 

(see Fig. 4). 

3 Use a cloth to wipe off the coin runway inside the coin validator. 

4 Close the flight deck again. 

5 Provide the coin validator with voltage again. 

Fig. 4: Opening the flight deck 


1

G-18.mft with vending machine control system MAINTENANCE AND SERVICE 

Displaying battery voltage 

The light-emitting diode (LED) on the left-hand side of the coin validator can 

be used to display the actual voltage of battery: 


The coin validator is now in the wake-up mode and no longer in the 

sleep mode. 


If the coin is inserted at too low battery voltage, the coin is no longer 

accepted. 

2 Keep the return lever pressed down. 

The LED now indicates one of the following voltage states of the 

battery: 

LED flashes and does not light up Battery voltage max. 

LED flashes2 times per second Battery voltage no longer max. 

3 times per second Battery voltage continues to drop 

. 

. 

. 

11 times per second Battery voltage almost min. 

LED lights up constantly Battery voltage min. 

3 Release the return lever. 

41


Testing escrow, selection buttons, product ejectors, 

motorized return mechanism manually 

If there is a malfunction in the vending machine components to be controlled, 

you can use the lower DIL switch on the additional control PCB and perform 

the respective function to determine whether the individual contacts are still 

intact: 

1 If necessary, unhook the coin validator and 

set the eighth DIL switch of the upper 

switching block on the rear of the device 

upward to ON (only if the operating elements 

on the additional control PCB are disabled). 



The device is now in the wake-up mode. 

4 Use a pointed object to set the lower DIL switch 1on the additional 

control PCB (see Fig. 5) leftward to ON. 

The flashing green and red LEDs indicate that the coin validator is no 

longer in the operating mode. 

5 Perform the function of the supposedly defective component 

(e.g. press selection button or return button). 

If the electrical contacts are still intact, you will hear an acoustic 

signal. 

6 Set the lower DIL switch 1 rightward again (to OFF). 

The LEDs stop flashing. The coin validator is in operating mode 

again. 

7 If necessary, unhook the coin validator again and set the eighth DIL 


hang the coin validator back in the vending machine. (Only if the 

operating elements on the additional control PCB are to be disabled) 

Fig. 5: Button and switches on the additional control PCB 

8 If necessary, repair or replace the component. 

12 


3


Status and error messages of the pilot lights in the machine 

door 

LED 

green LED 

is flashing 

red LED 

is flashing 

green and 

red LED 

are flashing 

The two pilot lights (LEDs) in the vending machine door that are controlled 

via the additional PCB are supposed to make it easier for the customer to 

operate the vending machine in normal operation. However, these LEDs 

also tell the service technician that there is a malfunction and what kind of 

malfunction it is. Accordingly, the green LED is used during a correct selling 

sequence and the red LED in the event of a malfunction or an error during 

the selling sequence: 

Meaning 

Credit sufficient for purchase 

Upon coin insertion 

(coin acceptance inhibited) 

• Credit has reached the highest 

price 

• All chutes are empty/defective 

• Malfunction in the escrow/ 

motorized return mechanism 

Upon pressing the selection 

button 

• Credit not sufficient for purchase 

• Chute is empty/defective 

Coin validator is in the service 

mode and not in the operating 

mode 


Troubleshooting 

No error, press selection button or 

insert additional coins for more 

expensive product 

• No error, do not insert any more 

coins and press selection button 

• Fill the chutes or reset the error 

by activating the automatic test 

run (see Chap. 6 "Starting up") 

• Reset the error by activating the 

automatic test run (see Chap. 6 

"Starting up") 

• No error, insert additional coins 

(with "exact price", until credit = 

price; with "overpay", until credit 

≥ price) and press selection 

button 

• Fill the chute or reset the error by 

activating the automatic test run 

(see Chap. 6 "Starting up") 

No error, set DIL switch on 

additional control PCB back again 

(to OFF) 

43


Troubleshooting 

Malfunctions can occur in all electronic devices. These do not always have 

to be faults in the device. In many cases the reason is improper connections 

or incorrect settings. Therefore: please first of all check, whether the 

malfunction can simply be remedied using the following table. 



Problem 

Coin 

validator 

does not 

accept coin 

Coin 

validator 

accepts 

coin, but no 

credit is 

given 

LED on the 

left of the 

validator is 

on 

Possible causes 

No power supply 

Return lever pressed/ 

got stuck 

Coin runway dirty 

Coin inhibited 

Coin does not exit the 

device 

• Battery voltage too 

low 

• Validator is loading 

new memory block 


Remedy, hints 

• Connect machine battery to additional 

control PCB and ribbon cable to control 

PCB and validator correctly (see section 

"Install coin validator and additional 

control PCB" in Chap. 6 "Starting up") 

• Check battery voltage (see section 

"Displaying battery voltage" in this 

chapter), if necessary, replace battery 

Make sure, that return lever is not 

inadvertently pressed 

Open flight deck and clean coin runway 

(see section "Cleaning coin validator" in this 

chapter) 

Make sure, that the coin is not inhibited 

using the DIL switches on the rear of the 

device or not only the narrow coin channel 

is enabled and the normal one is inhibited 

(see section "Inhibiting coins" in Chap. 7 

"Operation") 

Make sure, that the coin outlet is not 

jammed by foreign objects or devices 

connected to the bottom of the coin 

validator 

• Replace battery 

• No error, LED goes out, as soon as 

memory block selected has completely 

been loaded 

If the malfunction cannot be remedied, you can use the NRI testers 

• G-19.0594 (for power supply of 220/230 V, ordering code 11801)/ 

• G-19.0651 (for power supply of 110/115 V, ordering code 21410) 

to test the signal lines of the connecting cable. 

To remedy other faults please contact our service technicians. 

45

WINEMP/PALMEMP G-18.mft with vending machine control system 

9 Which functions can be set using 

WinEMP/PalmEMP? 

The NRI software solutions WinEMP or PalmEMP serve the purpose of 

diagnosing and configuring NRI coin validators as well as updating the data 

blocks in the device memory. 

WinEMP is PC software and part of a programming station for the workshop. 

For more information, please see the section "Accessories" in Chap. 10 

"Technical data". 

PalmEMP is software which can be installed as an additional application on 

a Palm handheld. If the Palm handheld is linked to the coin validator via a 

dongle (see section "Accessories" in Chap. 10 "Technical data"), the 

G-18.mft can be directly configured on site inside the vending machine. 

Both programs identify the connected coin validator and its device-own data 

and present them on the screen of your PC or on the Palm handheld display 

for the purpose of inspection or configuration. 

The device functions listed below can be set using WinEMP/PalmEMP (see 

separate software instructions). 

• Optimize acceptance of genuine coins and rejection of false coins 

(acceptance band adjustment following the insertion of genuine coins 

and false coins) 

• Prices 

• Not installed chutes 

• Smallest coin value 

(as a reference value and basis of calculation for all coin values) 

• New coins/tokens 

(creating a new acceptance band and assigning a coin value) 

• Data block download for current coin information 

The WinEMP and PalmEMP functions that are relevant for the 

vending machine control system of the G-18.mft are currently being 

revised. 


G-18.mft with vending machine control system TECHNICAL DATA 

10 Technical data 

The G-18.mft is designed in accordance with the BDTA standard: 

Supply voltage 9 V/12 V battery 

Current consumption 

U nom = 9 V Sleep mode: approx. 10 µA 

Standby mode: approx. 40 mA (wake-up mode) 

Coin acceptance: approx. 370 mA (for approx. 35 ms) 

approx. 145 mA (for approx. 300 ms) 

U nom = 12 V Sleep-Mode: approx. 13 µA 

Standby-Mode: approx. 40 mA 

Münzannahme: approx. 320 mA (for approx. 35 ms) 

approx. 120 mA (for approx. 300 ms) 

Temperature range -25 °C to 70 °C 

Temperature change Max. 0.2 °C/min. 

Rel. humidity Up to 93 % 

Condensation Short, rare, and slight condensation permitted 

Machine interface Aditional control PCB 

for pin assignment see section "Pin assignment and 

connection diagrams" in this chapter 

Coin acceptance Max. 24 coin in 2 x 12 channels 

Coin diameter: 29,5 mm (optionally up to 32.5 mm) 

Coin thickness: 2,6 mm (optionally up to 3.5 mm) 

Speed: 2 coins/sec. 

Device dimensions Height: 185.7 mm 

Width: 126.7 mm 

Depth: 49.5 mm (57 mm with pressed return lever) 

(all mounting dimensions according to BDTA standard, 

see section "Mounting dimensions" in this chapter) 

Mounting position Vertical, max. deviation: ± 2° 

Mark of conformity CE (see next section) 


47

TECHNICAL DATA G-18.mft with vending machine control system 

CE certification 

The CE certificate (CE = Communautés Européennes) confirms 

that our products comply with specified basic requirements of 

the applicable directive. The CE certificate is not a quality 

assurance certificate in terms of the quality expected by the 

manufacturer but only in terms of the quality demanded legally. It is a pure 

administrative certificate and is intended only as proof of compliance with 

the directives for the monitoring authorities and not directed at clients or final 

customers. 

Which directives were applied can be seen in the declaration of conformity. 

The manufacturer must keep this declaration available for the monitoring 

authorities only (for a minimum period of 10 years after the last product has 

been introduced to the market). However, upon request we can provide 

copies of this declaration for our customers. 

The following directives and their subsequent changes can be partially 

applied to our devices: 

1. The EMC Directive (89/336/EEC) 

for devices which cause electromagnetic interference or are interfered 

with by such. 

2. The Low Voltage Directive (73/23/EEC) 

for electrical operating means which are used with a nominal voltage 

of between 50 and 1000 V AC and 75–1500 V DC. 

3. The CE Certificate Labelling Directive (93/68/EEC) 

Modification directive regarding the application and use of CE labels. 



Mounting dimensions 

TheG-18.mft is designed in accordance with the BDTA standard, also 

compare: 

• Mounting dimensions according to DTG standard 1.3 (30/09/88) in 

"BDTA-Norm Münzprüfer, Abschnitt B, „Batteriebetriebener Münzprüfer“ 

(Dez. 2000)" and 

• Mounting dimensions according to DTG standard 1.1 (18/06/02) in 

"BTA-Standard, MDB-Schnittstelle für batteriebetriebene Münzprüfer, 

Version 1.0 (Nov. 2003)" 

The following drawing shows the mounting dimensions of the manufacturerspecific 

connection field on the rear validator cover: 

70.8 

11.2 

8 

6 

40.5 

24 

4.6 29 

5.5 


10.8 

39.05 34 

49.3 

1.2 

28.8 

13.1 

23.8 

7.7 

21 

75 

11 

23 

49


Pin assignment and connection diagrams for ... 

5 

For the connection of the G-18.mft to the vending machine components to 

be controlled and to the optional MDB periphery, the following pages will 

provide you with information on the pin assignment and connection diagrams 

of the interfaces on the additional control PCB as well as of the 10-pole MDB 

interface on the rear of the coin validator. 

1a 1b1c 1d 1e 

... Product ejectors 1–5 (1a–1e, Fig. 6) 

... Escrow (2, Fig. 6) 

Pin 1 MOT1–MOT5 + 

Pin 2 MOT1–MOT5 GND 

Pin 3 Switch GND 

Pin 4 E1–E5 (no normally open , in final position closed) 

Pin 5 E1–E5 (no normally open ) 

Pin 1 MOT + (+ >> cash-box) 

Pin 2 MOT - 


Pin 4 E1 (no normally open ), left switch from rear 

Pin 5 E1 (no normally open ), right switch from rear 

... Motorized return mechanism (3, Fig. 6) 

... Battery (4, Fig. 6) 

Fig. 6: Vending machine interfaces on the additional control PCB 

Pin 1 MOT + 

Pin 2 MOT GND 


Pin 4 E (no normally open , in final position closed) 

Pin 5 – 

Pin 1 BAT GND 

Pin 2 BAT + 


4 

3 

2 

12 

5 

1 

5 

1 

5 

1 

2 

B1


... Selection buttons, pilot lights, return button (vending machine door) 

(5, Fig. 6) 

Pin 1 GND 

Pin 2 SB1 

Pin 3 SB2 

Pin 4 SB3 

Pin 5 SB4 

Pin 6 SB5 

Pin 7 Return button 

Pin 8 LED1 + 

Pin 9 LED2 + 

Pin 10 GND 

... MDB periphery (10-pole) 

Pin 1 0 V supply 

Pin 2 – 

Pin 3 Master receive 

Pin 4 0 V supply 

Pin 5 Master transmit 

Pin 6 Switch line for WinEMP/PalmEMP software 

Pin 7 Wake-up line (active low) 

Pin 8 + 5 V (I max 10 mA) 

Pin 9 – 

Pin 10 12 V DC supply 


1 2 

9 

10 

1 

10 

51


Accessories 

To adapt the coin validator to suit your individual needs, you can acquire the 

following accessories from NRI: 

Configuration software 

To enable you to react as quickly as possible to new false coins in circulation 

at the workshop or on site at the vending machine and to enable you to make 

your individual settings, the coin validator can be connected to: 

• The NRI PC programming station consisting of: 

– Configuration and diagnostics software "WinEMP”, including card 

reader and chip card (ordering code 20119 for basic module and 

20166 for data block download additional module) 

– either: 

Tester G-19.0594/4 for mains voltage of 230 V 

(ordering code 11801) or 

Tester G-19.0651 for mains voltage of 115 V (ordering code 21410) 

or: 

Tester G-19.0654 (ordering code 24257) and 

24-V DC power pack (ordering code 24684) and 

power cable with Euro plug (ordering code 24683) or with USA plug 

(ordering code 24853) or power cable with Euro plug and international 

adapter (ordering code 24683 and 22502) as well as 

a connecting cable (ordering code 23627) 

The tester mentioned last is still being modified for the connection 

to the G-18.mft, but it also provides the option of being able to 

connect to the WinMDB PC test station (see separate WinMDB 

instructions). 

• NRI Palm application "PalmEMP” (freeware on NRI homepage) 

To be able to connect a Palm handheld m125 and higher to the coin 

validator, you need a dongle with the ordering code 23760; for an 

m105, a dongle with the ordering code 23761. If you wish to perform 

data block downloads with the help of a Palm handheld, you need the 

WinEMP software (see above) with PalmEMP download rights 

(ordering code 23649), which are stored on the WinEMP chip card. 

You can also connect the Palm handheld via the universal dongle 

with a 9-pole D-SUB plug (ordering code 23764). However, the Palm 

handheld must then be equipped with an interface that can be 

connected to the serial HotSync cable (available from Palm TM ). 

For details regarding which settings can be made with the help of WinEMP 

and PalmEMP, please see Chap. 9 "Which functions can be set using 

WinEMP/PalmEMP?”. For details on how to carry out these settings, please 

refer to the separate software instructions. 



Update software 

The coin validator is equipped with a microprocessor including a flash 

memory. This allows the coin validator operating software to be updated 

quickly and without complications. 

In order to load new operating software in the coin validator, you need one 

of the following alternatives (current operating software available on request): 

• NRI PC update station for the workshop, consisting of: 

– software "WinFlash” (ordering code 21524) 

– tester G-19.0641 for voltage supply of the coin validator (ordering 

code 12922) 

– programming adapter G-19.0649 (ordering code 20308) 

• NRI update solution for on-site programming, consisting of: 

– PC software "WinFlash” (ordering code 21524) in order to load the 

current firmware from the hard disk of your PC into the flash 

prommer 

– mobile Flash-Prommer G-55.0350 (ordering code 20308) 

For details on how to install and apply WinFlash and flash prommer, please 

refer to the respective separate instructions. 

GeldKarte card reader and display 

If the vending machine is to be converted to coin and card operation, the coin 

validator can also take over control of the following MDB periphery in addition 

to controlling the vending machine functions: 

• MDB GeldKarte card reader 

– G-55.8417 "compact module” or 

(ordering code differs depending on each model and must be 

requested from NRI) 

– G-55.8497 "modular design" 

(ordering code differs depending on each model and must be 

requested from NRI) 

• MDB display (ordering code 24030) 

The MDB periphery is connected using an MDB cable set (ordering code 

24026). 


53

INDEX G-18.mft with vending machine control system 

Index 

A 

Accentuations in the text 7 

Acceptance 

band 23, 59 

create (new coin) 37 

inhibit 34 

narrow 20, 24 

normal 20, 24 

very narrow 20, 24 

coins 23, 47 

speed 47 

Accepted coin sensor 25 

Accessories 52 

Adapter, WinFlash 53 

Additional control PCB 

Design 21 

install 27 

Advantages 9 

Angle, mounting position 47 

Application, proper 10 

Assignment, pins 50 

B 

Bar code 20 

Battery 

empty detection 26 

pin assignment 50 

voltage, display 41 

BDTA MDB slave protocol 12 

Block 24 

definition 59 

illustration, label 20 

select 36 

Button, additional control PCB 21 

disable 36 


C 

Cable set, MDB periphery 53 

Card reader 26 

ordering code 53 

CE 

certification 48 

directives 48 

Channel 

definition 59 

narrow 20, 24 

normal 20, 24 


Chapter summary 7 

Charge, electrostatic 11 

Cleaning 40 

Coin 

acceptance 23, 47 

band 59 

channel 

definition 59 

narrow 20, 24 

normal 20, 24 


diameter 47 

insert funnel 15 

jam 15 

outlet 15 

properties 59 

rejection 23 

runway, clean 40 

thickness 47 

type 20, 59 

inhibit 34 

teach 37 

Condensation 47 

Configuration 46 

accessories 52 

Conformity declaration 48 

Connection 

diagram, MDB periphery 51 

in the vending machine 27 

in the workshop (WinEMP) 33 

MDB periphery 53 

on the Palm handheld (PalmEMP) 33

G-18.mft with vending machine control system INDEX 

Connectors 

on additional control PCB 21 


on coin validator 19 

dimensions 49 


Conventions, instructions 7 

Cover, mounting dimensions 49 

CP3 25 

Credit 25 

Currency 20 

Current consumption 47 

D 

Data block 

download 59 

number 20 

Deployment, proper 10 

Design 14 

additional control PCB 21 

coin validator 15 

Deviation, mounting position 47 

Device 

dimensions 47, 49 

environment 

PalmEMP 33 

WinEMP 33 

type 20 

DIL switches 16 


disable 36 

set prices 31 

test vending machine components 42 

on coin validator 

dimensions 49 

inhibit coins 34 

select exact price/overpay 32 

select memory block 36 

Dimensions 47, 49 

Diode 


display battery voltage 41 

vending machine door 22 


troubleshooting 43 

Disable 

switch/button, additional control PCB 36 

Discharge, electrostatic 11 

Display 26 


Documentation, additional 8 


Dongle, PalmEMP 52 

Door (vending machine), pin assignment 51 

Download, data block 59 

E 

Ejectors 


test 42 

Electrostatic discharge 11 

EMC directive 48 

Error remedy 43 

Escrow 25 


test 42 

Exact price 25 

set 32 

External devices 19, 26 



F 

Firmware update 53 

Flash prommer 53 

Flight deck, open 40 

Functional principle 40 

Functions 23 

adjustable 46 

G 

GeldKarte card reader, ordering code 53 

General information 

chapter 7 


instructions 7 

Glossary 59 

Guide (chapter contents) 7 

55


H 

Handling 34, 40 

Homepage, NRI 8 

Humidity 47 

I 

Inhibit 

coins 34 

switches/button, additional control PCB 36 

Insert funnel 15 

Installation 27 



MDB periphery 53 

on the Palm handheld (PalmEMP) 33 

Interfaces 




dimensions 49 


Internet pages, NRI 8 

Introduction 

chapter 7 


instructions 7 

J 

Jam caused by coins 15 

L 

Label 20 

LED 






Liability 10 

Light-emitting diode 






Limits, acceptance bands 23 

Low voltage directive 48 


M 

Maintenance 40 

Malfunction remedy 43, 44 

Manuals, additional 8 

Manufacture date 20 

Mark of conformity 47 

Markings in the text 7 

MDB 

cable set 53 

card reader 53 

definition 59 

display 53 

periphery 

interface 19 


Measurement area 15 

Measures 47 

Memory block 24 

definition 59 

illustration, label 20 

select 36 

Motorized return mechanism 


test 42 

Mounting 

dimensions 47, 49 

position 47 

N 

Narrow coin channel 20, 24 

New coin, teach 37 

Nominal voltage 20 

Normal coin channel 20, 24 

Notes 7 

NRI homepage 8 

O 

Open coin validator 40 

Operating 

instructions, additional 8 

modes, additional 12 

software update 53 

voltage 47 

Operation 34 

Order number 20 

Ordering code 



Outlet, coins 15 

Overpay 25 

set 32

G-18.mft with vending machine control system INDEX 

P 

PalmEMP 

adjustable functions 46 

connection 33 


PC programming station 


connection 33 


PCB 

design 21 

install 27 

Periphery 26 



Pictograms in the text 7 

Pilot light 






Pin assignment 50 

Pins 

on additional control PCB 

assignment 50 


assignment 50 

Power 

consumption 47 

supply 47 

Price 25 

set 31 

switch 31 

disable 36 

Product 

ejectors 


test 42 

selection 25 

Programming 46 


adapter, WinFlash 53 

station 


connection 33 


Proper use 10 


R 

Rejection, coins 23 

Relative humidity 47 

Remaining credit 25 

Requests to perform an action 7 

Residual credit 25 

Return 

button 15 


lever 15 

Return mechanism 15 

mechanical 15 

motorized 15 


test 42 

Revision number for data block download 20 

Runway, clean 40 

S 

S1 protocol 12 

Safety instructions 7, 10, 11, 48 

Sale 25 

Scope of delivery 9 

Selection buttons 


test 42 

Selling 

operation 25 

prices 

set 31 

Serial number 20 

Setting 46 


Slave devices 26 

interface 19 



Standard coin validator 12 

Starting up 27 



on the Palm handheld (PalmEMP) 33 

vending machine components 30 

Status messages 43 

Summary, chapter contents 7 

Supply voltage 47 

57


Switching block 16 

definition 60 


inhibit 36 

set prices 31 

test vending machine components 42 


dimensions 49 

inhibit coins 34 

select exact price/overpay 32 

select memory block 36 

Symbols in the text 7 

T 

Teach 

coins 37 

mode 

description 26 

teach coins 37 

Technical data 47 

Temperature 

change 47 

range 47 

Test 

button 21 

run, vending machine components 30 

Tester, ordering code 52, 53 

Text conventions 7 

Tilt, mounting position 47 

Tokens 

definition 60 

teach 26, 37 

Totalizer 12 

Troubleshooting 43, 44 


U 

Update firmware 53 

Use, proper 10 

V 

Validation area 15 

Vending machine door, pin assignment 51 

Very narrow coin channel 24 

W 

WinEMP 


connection 33 


WinFlash 53 

www.nri.de 8

G-18.mft with vending machine control system GLOSSARY 

Glossary 

Acceptance band A range of acceptable measured values of one coin type with 

specific → coin properties defined by an upper and lower limit 

value. 

Block → Memory block 

Channel → Coin channel 

Coin acceptance band → Acceptance band 

Coin channel A coin channel or its → acceptance band serves the purpose 

of accepting → coin types with the same → coin properties. 

Various functions that describe how an accepted coin is 

further-processed (coin value, etc.) are assigned to a coin 

channel. 

Coin properties Coin properties which are measured when a coin is inserted 

into the coin validator. These are e.g. material, thickness, 

volume, minting, diameter, mass, hardness, etc. 

Coin type One coin type includes all coins for which the → coin 

properties agree. 

Data block download When updating a data block set (2 data blocks) using WinEMP 

or PalmEMP, the data blocks for the connected coin validator 

are loaded quickly and easily from the internal hard disk of 

your PC or from the Palm handheld into the coin validator. By 

doing this, a new data block is stored in → memory block 0 

and memory block 1. The new data blocks contain different 

configurations of → coin channel data, e.g., current limit 

values of the → acceptance bands or other coin information. 

MDB Multi Drop Bus. The abbreviation defines a serial interface 

specification for an internal communication protocol for 

vending machines. You will find detailed information about 

the MDB interface in the "NAMA document MDB/ICP, 2.0" 

(www.vending.org). 

Memory block The coin validator can data-manage two independent coin 

configurations using two memory blocks. Twelve individual 

→ coin channels are assigned each of these blocks. 


59

GLOSSARY G-18.mft with vending machine control system 

Switching block The coin validator has three switching blocks, which are 

located on the rear of the coin validator and incorporate a 

number of DIL switches. Each switch has a specific function, 

e.g. inhibiting individual → coin channels or switching the → 

memory blocks. 

Token A token is inserted into the machine as payment instead of 

coins in a currency.

3 Other operating modes of the G-18.mft - NRI

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