Microcontroller MC - Bosch Rexroth

RE 95 050/05.00 

RE 95 050/05.00 

Replaces: 05.99 

Microcontroller MC 

for open and closed loop control of hydrostatic drives 

MC6E/32 - MC6H/32 - MC7/21 - MC8/10 

Index 

Features 1 

Type code 2 

Software library 2 

Software 3 

Technical data 4...5 

MC6E/32 6...9 

MC6H/32 10...13 

MC7E/21 14...17 

MC8/10 18...21 

Test adapter 22 

Safety concept for MC6, MC7, MC8 22 

Features 

"MC" microcontrollers are designed for the programmable control of 

electrically adjustable axial piston pumps and motors from Brueninghaus 

Hydromatik. 

These microcontrollers have been specially developed for use in mobile 

machinery, and they satisfy appropriate protective requirements regarding 

environmental temperatures, water tightness, resistance to shock and 

vibration and electromagnetic interference (EMC). 

The various types of MC microcontroller have similar housings and 

connecting plugs. They differ essentially in their capacity, i.e. their number 

of inputs and outputs. 

On the input side, for example, the MC microcontrollers process signals 

from potentiometers, pressure sensors, speed sensors or switches. The 

supply voltages for potentiometers and sensors with built-in amplifiers 

are provided by the MC. 

As output variables, the MC microcontrollers deliver regulated currents, 

for the direct control of proportional solenoids, and switched currents, 

for example for relays, switching solenoids or warning lamps. The analog 

power outputs are pulse width modulated (PWM) and optimally tuned 

to the electrically operated proportional controls of axial piston machines 

in order to ensure high accuracy and minimal hysteresis. 

For communication with service tools, the MC microcontrollers have 

RS232 serial interfaces. For data interchange between several 

microcontrollers or with other computer systems, e.g. an electronic diesel 

engine management system, CAN bus interfaces are also provided. 

As software for the MC microcontrollers, universal programs are available 

as first option. The parameters of these programs are adjusted to the 

relevant application with the aid of the service tools. Secondly, special 

application-oriented program packages can be created on the basis of 

an existing software library. 

In combination with the pumps, motors, sensors, transducers and 

actuators from the Brueninghaus Hydromatik product range, the MC 

microcontrollers and associated software provide high-class system 

solutions for hydrostatic drive systems. 

MC 1/22

RE 95 050/05.00 

Ordering Code 

Type 

Microcontroller MC 6 7 8 

MC / 

Construction 

standard – – S 

with actuator output – – M 

extended, with actuator output and CAN bus 

E 

half format, with actuator output and CAN bus – – H 

Series/Index 

32 21 10 

● = available – = not available 

Note: Microcontroller MC cannot be used without software. 

Brueninghaus Hydromatik provides software packages for an extremely wide variety of applications. 

Software Library 

Software 

function 

module 

(1) Automotive driving 

(2) Constant preset 

engine speed 

(3) Constant Speed Drive CSD 

(4) Hydrostatic braking 

(5) Reversing 

(6) Inching 

(7) Load limiting control GLR 

(8) Tractive force limitation 

(9) Speed-dependent tractive force 

(10) Automatic gear change SGM 

(11) Synchronous dual-circuit drive 

(12) Anti slip control ASR 

(13) Safety monitoring with 

hardware fault detection 

(14) Parameter setting, diagnostics 

Typical 

applications 

● 

❍ 

❍ 

● 

● 

● 

● 

❍ 

❍ 

❍ 

● 

● 

● 

● 

● 

● 

● 

● 

❍ 

● 

● 

● 

● 

● 

● 

● 

❍ 

● 

Municipal vehicles 

Forestry machinery 

Sweeping machines 

Fork lift trucks 

Wheel loaders 

Backhoe 

● 

● 

● 

● 

● 

● 

❍ 

● 

● 

● 

● 

● 

● 

● 

● 

● 

❍ 

● 

● 

❍ 

❍ 

● 

● 

● 

● 

● 

● 

❍ 

❍ 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

● 

❍ 

● 

● 

● 

Crawler and dozer 

Road finishing machines 

Mobile cranes 

Straddle carrier 

Excavators 

● 

● 

● 

● 

● 

● 

● 

● 

❍ 

● 

● 

● 

● standard 

❍ optional 

Other 

applications 

available on 

request 

Software product 

Note: 

Typical hardware 

applications 

FGR 

FGR 

MC8 




FGR 

FGR 

FGR 

FGR 





FZA 


FZA 

ASR 



For optimisation of software commissioning may need to be carried out by Brueninghaus Hydromatik! 

ASR 

GLB 

Brueninghaus Hydromatik 2/22 MC

RE 95 050/05.00 

Software (RE documentation available on request) 

Electronic load limiting control for excavators (see RE 95072) 

Software GLB 

– Optimum utilisation of power from the engine in every operating mode 

– Load limiting control with any speeds and different power modes 

– Additional functions, such as rotating mechanism control, increased lifting loads and temperature-dependent power reduction 

Electronic drive control for municipal vehicles (see RE 95059) 

Driving software with load limiting control FGR 

– Automotive driving with optimum acceleration, deceleration and reversing 

– Accurate driving control with preset engine speed and load limiting control for operations such as sweeping, mowing and 

snow-clearing 

– Fast and accurate load limiting control 

– Additional functions such as tractive force limiting and automatic gear change 

Electronic drive control for track drives (see RE 95065) 

Driving software for dual-circuit drives FZA 

– Control of speed for accurate forward movement and curve control 


– Safety monitoring and emergency actions 

– Load limiting control and additional functions e.g. control of work functions 

Electronic drive control for fork lift trucks (see RE 95057) 

Driving software with load limiting control FGR 

– Automotive driving with optimum fine speed control, acceleration, deceleration and reversing 

– Programmable dynamics of vehicle movement and load limiting control for the engine 

– Automotive speed increase when actuating the implement functions under retention of the drive speed 

(Constant speed drive CSD) 

– Gear changing of wheel motors under load 

Electronic drive control for wheel loaders (see RE 95058) 

Driving software with load limiting control FGR and automatic gear change SGM 


– Speed-dependent tractive force 

– Load limiting control of engine for every operating mode 

– Automatic gear change (SGM) 

Electronic drive control for vehicles with single wheel drive (see RE 95070) 

Driving software with load limiting control FGR and anti slip control ASR 


– Load limiting control of engine 

– Anti slip control to prevent slipping of drive wheels 

Pump/Motor control (see RD 95077) 

Software PMS 

– Pump / motor sequential control adjustment 

– Control characteristics programmable with control panel BB-3 

– Programmable time-delay functions for the output signals 

Constant Speed Drive 

Software CSD 

– Open loop controlled constant drive speed, independent of the diesel engine speed 

– Operated (increase or reduction of drive speed) by push-buttons 

(in preparation) 

MC 3/22 Brueninghaus Hydromatik

RE 95 050/05.00 

Technical Data 

Type MC6E/32 MC6H/32 MC7S/21 MC7M/21 MC7E/21 MC8E/10 

Nominal voltage 

Supply voltage 

12 V, 24 V 

10 V...33 V DC 

Residual ripple (DIN 40839, part 1) 

max. ± 2 V 

Overall current consumption: approx. approx. approx. 

without load 500 mA 250 mA approx. 250 mA 250 mA 

with max. load < 30 A < 15 A < 15 A < 10 A 

Internal fuse(s) 

none 

External fuse protection 30 A 20 A 15 A 15 A 

No. of: 

analogue inputs 1 ) 10 6 7 4 

switched inputs 12 6 6 6 

speed inputs 8 4 3 2 

proportional solenoid outputs (PWM) 12 6 4 3 

switched outputs 6 3 2 1 

actuator outputs 2 ) (bidirectional PWM) 2 1 – 1 3 ) 1 3 ) 1 

analogue outputs (voltage) 2 1 1 3 ) 1 

RS 232 interfaces for BB-3 4 ) 2 1 1 1 

or "BODEM" PC software 2 1 1 1 

CAN bus interfaces 5 ) 2 1 – – 1 1 

Fault detection 6 ): 

for potentiometer inputs (no.) 8 4 2 4 

for solenoid outputs (no.) 

all solenoid outputs 

Analog inputs: Voltage range 0,05 ... 4,95 V 0 ... 5 V 0,05 ... 4,95 V 

Switch inputs, programmable high active or low active 7 ) 

Supply voltage for potentiometers 

5 V 

Resistance value for external potentiometers 6 ) 

2,5 kΩ...5 kΩ 

Supply voltage for sensors +5 V / 30 mA +5 V / 20 mA +5 V / 20 mA 

Speed inputs: 

Input voltage 

≥ 1 V eff 

Frequency range 

1 Hz...11 kHz 

Proportional solenoid outputs: 

100 or 

Pulse frequency (PWM) 100 or 200 Hz 8 ) 100 or 200 Hz 9 ) 200 Hz 10 ) 

Current range (load-dependent) 

Switch outputs, maximum current 

Actuator outputs: 

PWM frequency 

Maximum continuous current 

Analog outputs, voltage range 

0...1,8 A 

1,3 A 

300 Hz 

±2,7 A 

0,5 ... 4,5 V (load R ≥10 kΩ) 

Microprocessors 2 x C167 1 x C167 C517A C167 

Memory capacity: 

RAM 2 x 1 MBit 1 MBit 256 kBit 1 MBit 

EPROM oder – – 512 kBit – 

Flash-EPROM 2 x 4 MBit 4 MBit – 1 MBit 

EEPROM 2 x 16 kBit 16 kBit 8 kBit 16 kBit 


RE 95 050/05.00 

Technical Data 

Type MC6E/32 MC6H/32 MC7S/21 MC7M/21 MC7E/21 MC8E/10 

Electromagnetic compatibility (EMC) 

line traced interference, electromagnetic interference immunity, 

interference emission, electrostatic discharge 

ISO 7637, european motor vehicle directive 95/94 EC pr EN 13309, increased immunity 11 ) 

Protection against short circuit to 

supply voltage and ground all in-/outputs 12 ) 

Permissible short-circuit current for 

internal connections 

15A short term (

RE 95 050/05.00 

MC6E/32 

The MC6E/32 microcontroller is used for the programmable control 

of a maximum of twelve proportional solenoids and six additional 

switching functions. It can therefore be used to provide open or closed 

loop control of complex drive systems with a single electronic unit. 

For more extensive requirements, the MC6E/32 can be expanded by 

additional microcontrollers connected by CAN bus. 

Internally, the MC6E/32 microcontroller consists of two identical circuit 

boards, each with a digital computing circuit and the analog circuits 

for the inputs and outputs. The two cards are connected to each 

other by a high-speed internal data communication link. 

As input signals, the microcontroller processes analog voltages in 

the 0V to 5V range and switching information. All inputs are protected 

against overvoltage and electric interference. The potentiometer inputs 

are equipped with monitoring circuits to detect cable breaks or short 

circuits. 

As output signals, the output stages of the MC6E/32 deliver closed 

loop controlled currents for the connection of proportional solenoids 

for adjusting pumps, motors or valves. Additional power outputs are 

provided for directly switching relays, lamps and switching solenoids. 

Two special PWM outputs each generate bidirectional currents for 

controlling STM actuator (RE 95120) for operating diesel engine fuel 

injection pumps. 

Two analog voltage outputs are provided for the simple forwarding 

of analog information to other electronic circuits. 

The RS232 serial interfaces permit connection either to the BB-3 

control panel (RE 29798 and RE 95080-B) or to a personal computer 

running the BODEM PC software (RE 95085) for service functions 

such as diagnostics, parameter setting or process variable display. 

Two separate CAN bus interfaces are available on the MC6E/32 

microcontroller for data interchange with other MC microcontrollers 

or other control units (e.g. diesel engine fuel injection, display or 

other special working functions). 

The software created and installed by Brueninghaus Hydromatik in 

the MC microcontroller is application specific. The associated product 

documentation contains the function description, setting specifications 

and diagnostic information. 

Special characteristics 

– High computing power and short program cycle times due to 

powerful 16-bit processors 

– High electromagnetic compatibility (EMC) 

– Fault detection at inputs and outputs for safety monitoring and 

diagnostics 

– Safety features, such as redundant input channels, separate 

voltage supply for the computing circuit and output amplifiers 

and central safety cut-out for all outputs 

– Pulse width modulated (PWM) solenoid currents for minimal 

hysteresis 

– Closed loop control of solenoid currents, i.e. independent of 

voltage and temperature 

– Application-specific functions by programming 

Main components 

– Mobile computer with 16-bit microcontroller module 

– Protected watchdog for program run monitoring 

– RS232 serial data interface for diagnostics, parameterization 

and process variable display 

– 2 separate CAN bus interfaces 

– Voltage supply and ground connections for potentiometers and 

sensors 

– Sturdy, sealed aluminum housing 

– Robust connector design. Watertight with suitable mating 

connector 


RE 95 050/05.00 

MC6E/32 - Block Circuit Diagram 

Battery 

+ 

Central safety 

cut-out 

Battery 

Speed 

inputs 1 ) 

Analog 

inputs 1 ) 

Switch 

inputs 1 ) 

Switch 

inputs 1 ) 

Analog 

inputs 1 ) 

Speed 

inputs 1 ) 

Battery 

+ 

- 

1 

3 

2 

4 

1 

3 

5 

2 

4 

1 

3 

5 

2 

4 

6 

6 

4 

2 

5 

3 

1 

4 

2 

5 

3 

1 

4 

2 

3 

1 

- 

+ 

Voltage 

supply 

Inputs 

Speed 

group 1 1 ) 

Speed 

group 2 1 ) 

Analog 

group 1 1 ) 

Analog 

group 2 1 ) 

Switch 

group 1 1 ) 

Switch 

group 2 1 ) 

Switch 

group 3 1 ) 

Switch 

group 4 1 ) 

Analog 

group 3 1 ) 

Analog 

group 4 1 ) 

Speed 

group 3 1 ) 

Speed 

group 4 1 ) 

Inputs 

Voltage 

supply 

Counter 

inputs 

A/D-converter 

10 bit 

Digital 

inputs 

Digital 

inputs 

A/D-converter 

10 bit 

Counter 

inputs 

Monitoring 

watchdog 

Microcontroller 16 Bit 

Flash- 

EPROM 

4 MBit 

EEPROM 

16 kBit 

RAM 

1 MBit 

Control unit 

for outputs 

Interface 

controller 

Interface 

controller 

Control unit 

for outputs 

Flash- EEPROM RAM 

EPROM 16 kBit 1 MBit 

4 MBit 


Monitoring 

watchdog 

Status feedback 

from all 

outputs 

D/A 

converter 

Internal 

data interface 

D/A 

converter 


from all 

outputs 

PWM output 

stages 

Switch output 

stages 

H bridge 

Outputs 

Interface 

driver 

Interface 

driver 

Outputs 

H bridge 

Switch output 

stages 

PWM output 

stages 

1 

2 

3 

4 

5 

6 

1 

2 

3 

1 

1 

1 

1 

1 

1 

1 

1 

3 

2 

1 

6 

5 

4 

3 

2 

1 

Proportional 

solenoid 

outputs 

Switch outputs 

Output for STM 

actuator 

Analog signal 

output 

RS232 serial 

interface 

CAN bus 

interface 

CAN bus 

interface 

RS232 serial 

interface 

Analog signal 

output 


actuator 


Proportional 

solenoid 

outputs 

Battery 

+ 


cut-out 

1 

) Inputs for safety-related functions should be configured with sufficient redundancy. 

The group 1 and group 2 inputs are mutually isolated by the technical circuitry. 


RE 95 050/05.00 

MC6E/32 - Terminal Connection Diagram 

This connection diagram is an example. Application-specific connection diagrams can be produced on request. 

fuse 

Connector A 

Connector B 

1 A 

emergency stop 

+12V/ 

+24V 

0V/ 

ground 

speed sensors 

1 

2 

3 

4 

30A 

fuse 

A1 

A28 

A2 

A3 

A30 

A13 

A41 

A14 

A43 

A15 

A44 

A16 

supply for power 

outputs 

voltage 

supply 

A32 

A5 

A33 

A6 

A34 

4) 

4) 

4) 

4) 

1 

2 

3 

4 

5 

proportional solenoids 

1 

2 

3 

4 

5 

4) 

4) 

4) 

4) 

B32 

B5 

B33 

B6 

B34 


outputs 

voltage 

supply 

B1 

B28 

B2 

B3 

B30 

B13 

B41 

B14 

B43 

B15 

B44 

B16 

1 

2 

3 

4 

speed sensors 

potentiometers 

4) 

A17 

A35 

4) B35 

B17 

A18 +4,5V 

+4,5V B18 

1 

A19 

6 

6 

B19 

4) 

4) 

2 

A45 +4,5V 

+4,5V B45 

A46 

B46 

A47 

B47 

A36 

B36 

3 

A20 +4,5V 

1 

1 

+4,5V B20 

A21 

B21 

A22 

A37 

4) 

4) 

B22 

B37 

4 

A48 +4,5V 

2 

2 

+4,5V B48 

A49 

B49 

A50 

A38 4) 

4) 

B50 

B38 

+ 3 

3 

+ 

A24 

B24 

5 

A25 

4) 

4) 

B25 

fault detection for 

2.5kΩ...5kΩ potentiometers 

switching solenoids, relays, 

lamps 



1 

2 

3 

4 

5 


sensor 

supply 

switches 

{ 

1 

2 

3 

4 

5 

6 

A23 

A7 

A8 

A9 

A10 

A11 

A12 

A52 

5) 

5) 

5) 

5) 

5) 

5) 

1 ) Short, low-resistance connection from the housing to the vehicle 

ground 

2) The BB-3 connecting cable or BODEM connecting cable are not 

included. Available from Brueninghaus Hydromatik on request 

3) The CANNON TRIDENT diagnostic connector, comprising: 

– Standard receptacle for female contacts 192990-1670 

– 8 gold-plated female contacts 192922-1470 

– Cable clamp, version HC 192990-1540 

– Protective cap for connector 192992-1490 

is not included with the microcontroller. 

Available from Brueninghaus Hydromatik on request. 

+5V 

1) 

TxD 

RxD 

CAN H 

CAN L 

A4 

A31 

A40 

A42 

A39 

A26 

A27 

A55 

M_ 

STM actuator 

A53 

B53 

analog... analog... 

or 5 ) A25 

B25 

or 

0V...5V 0V...5V 

5 ) 

coding for 

plug A 

RS 232 

CAN bus 

RS 232 

M_ 

C 

D 

B 

E 

A 

G 

F 

3) 

B4 

B31 

B40 

B42 

B39 

CAN bus 

B26 

B27 

B55 

TxD 

RxD 

CAN H 

CAN L 

2) 

5) 

5) 

5) 

5) 

5) 

5) 

BB-3 

4 ) Separate ground connection to battery (chassis also possible) 

5) Pull-up or pull-down programmable for these inputs. 

Consequently, the switch inputs (all together) must be switched 

either to +12V/24V or to ground, depending on the application. 

Note to 2) and 3): 

When connecting or disconnecting the BB3-connecting cable or 

BODEM-connecting cable, MC and PC have to be switched off! 

+5V 

B23 

B7 

B8 

B9 

B10 

B11 

B12 

B52 

1 

2 

3 

4 

5 

6 

coding for 

plug B 

BB-3 control panel 

or 

PC with 

BODEM software 

{ 

sensor 

supply 

switches 


RE 95 050/05.00 

MC6E/32 - Unit Dimensions 

approx. ca. 

Connector 

A 

Connector 

B 

Mating connector 

(not included) 



Plug Contacts 

1 

27 

28 55 

The 2 AMP timer connectors for MC6E/32, 

each consisting of: 

– Timer hybrid housing 0185887-1 

– 8 junior power timer contacts 927771-1 

– 47 micro timer type 4 contacts 185158-1 

are not included with the microcontroller. 


Setting and Display Facilities 

All calibration operations and the display of functions, faults and 

system variables are connected via the serial interface to the BB-3 

control panel (RE 29798 and RE 95080-B) or to a PC running the 

BODEM software (RE 95085). 


RE 95 050/05.00 

MC6H/32 

The MC6H/32 contains only one circuit board, which is identical to 

the two in the MC6E/32. 

Consequently, the MC6H/32 is suitable for controlling a maximum of 

six proportional solenoids and three additional switching functions. 

For example, it can provide the complete open loop control of simple 

dual-circuit drive systems for tracked vehicles. 



against overvoltage and electric interference. The potentiometer inputs 


circuits. 

As output signals, the output stages of the MC6H/32 deliver closed 




A special PWM output generates a bidirectional current for controlling 

STM actuator (RE 95120) for operating diesel engine fuel injection 

pumps. 

The analog voltage output is suitable for the simple forwarding of 

analog information to other electronic circuits. 

The RS232 serial interface permits connection either to the BB-3 




A CAN bus interface is available on the MC6H/32 for data interchange 

with other MC microcontrollers or other control units (e.g. diesel 

engine fuel injection, display or special work functions). 






– High computing power and short program cycle times with a 

powerful 16-bit processor. 


– Fault detection at inputs and outputs for safety monitoring and 

diagnostics 

– Safety features, such as redundant input channels, separate 

voltage supply for the computing circuit and output amplifiers 

and central safety cut-out for all outputs 


hysteresis 





– Mobile computer with a 16-bit microcontroller module 




– CAN bus interface 


sensors 



connector 


RE 95 050/05.00 

MC6H/32 - Block Circuit Diagram 

Battery 

+ 


cut-out 

Battery 

Speed 

inputs 1 ) 

Analog 

inputs 1 ) 

Switch 

inputs 1 ) 

+ 

- 

1 

3 

2 

4 

1 

3 

5 

2 

4 

6 

1 

3 

5 

2 

4 

6 

Voltage 

supply 

Inputs 

Speed 

group 1 1 ) 

Speed 

group 2 1 ) 

Analog 

group 1 1 ) 

Analog 

group 2 1 ) 

Switch 

group 1 1 ) 

Switch 

group 2 1 ) 

Counter 

inputs 

A/D-converter 

10 bit 

Digital 

inputs 

Monitoring 

watchdog 


Flash- 

EPROM 

4 MBit 

EEPROM 

16 kBit 

RAM 

1 MBit 

Control unit 

for outputs 

Interface 

controller 


from all 

outputs 

D/A 

converter 

PWM output 

stages 

Switch output 

stages 

H bridge 

Outputs 

Interface 

driver 

1 

2 

3 

4 

5 

6 

1 

2 

3 

1 

1 

1 

1 

Proportional 

solenoid 

outputs 



actuator 

Analog signal 

output 

RS232 serial 

interface 

CAN bus 

interface 

1 

) Inputs for safety-related functions should be configured with sufficient redundancy. 

The group 1 and group 2 inputs are mutually isolated by the technical circuitry. 


RE 95 050/05.00 

MC6H/32 - Terminal Connection Diagram 

This connection diagram is an example. Application-specific connection diagrams can be produced on request. 

fuse 

1 A 


+12V/+24V 

0V/ground 

speed sensors 

15A 

fuse 

1 

2 

1 

28 

2 

3 

30 

13 

41 

14 

43 


outputs 

voltage 

supply 

32 

5 

33 

4) 

4) 

1 

2 

3 

proportional solenoids 

3 

4 

15 

44 

16 

6 

34 

4) 

4) 

4 

5 


sensor supply 

switches 

1 

2 

3 

4 

5 

6 

or 5 ) 

+ 

+ 

{ 

1 

2 

3 

4 

5 

6 

17 

18 

19 

45 

46 

47 

20 

21 

22 

48 

49 

50 

24 

25 

52 

23 

7 

8 

9 

10 

11 

12 

+4,5V 

+4,5V 

+4,5V 

+4,5V 

+5V 

5) 

5) 

5) 

5) 

5) 

5) 



TxD 

RxD 

CAN H 

CAN L 

35 

36 

37 

38 

4 

31 

53 

25 

4) 

4) 

4) 

4) 

4) 

6 

1 

2 

3 

M_ 

analog... 

0V...5V 

switching solenoids, relays, 

lamps 

STM actuator 

40 C 

42 

D 

39 

B 

E 

RS 232 

A 

G 

F 

26 

27 

3) 

55 

2) 

BB-3 


or 

PC with 


CAN bus 

1) 


ground 


















RE 95 050/05.00 

MC6H/32 - Unit Dimensions 

➤ 

➤ 

➤ 

➤ 

235 

ca. 400 

approx. 

5,25 15 

7,5 

➤ 

➤ 

➤ 

➤ 

➤ 

➤ 

➤ 

➤ 

➤ 



51 

➤ 

159 

177 

187 

➤ 

7,5 

➤ 

➤ 

➤ 

283 

➤ 

➤ 

Plug Contacts 

1 

27 

28 55 

The AMP timer connector for MC6H/32, consisting of: 












RE 95 050/05.00 

MC7E/21 

The MC7E/21 microcontroller is used for the programmable control 

of a maximum of four proportional solenoids and two additional 

switching functions. It is therefore for example suitable for the open 

or closed loop control of a hydrostatic drive transmission for mobile 

machinery. For more extensive requirements, the MC6/32 

microcontroller, for example, can be used. 

Internally, the MC7E/21 microcontroller consists of two circuit boards: 

one "processor card" with the computing section and one "peripheral 

card" with the analog circuits for the inputs and outputs. 

As input signals, the microprocessor processes analog voltages in 


against overvoltage and electrical interference. Two of the 

potentiometer inputs are equipped with monitoring circuits to detect 

any cable break or short circuit. 

As output signals, the output stages of the MC7E/21 deliver closed 





STM actuator (RE 95120) for operating diesel engine fuel injection 

pumps. 







A CAN bus interface is available on the MC7/21 for data interchange 








– Robust design with specifications for mobile applications. 


– Inputs and outputs available with fault detection 

– Safety features, such as redundant inputs and central safety 

cut-out of all outputs 


hysteresis 





– Mobile computer with 8-bit microcontroller 






sensors 

– Internal buzzer for programmable monitoring of functions or 

errors 



connector 


RE 95 050/05.00 

MC7E/21 - Block Circuit Diagram 


cut-out 

Battery 

Speed 

inputs 1 ) 

Analog 

inputs 1 ) 

Switch 

inputs 1 ) 

+ 

- 

0 

1 

2 

0 

1 

2 

3 

4 

5 

6 

0 

1 

2 

3 

4 

5 

Voltage 

supply 

Inputs 

Speed 

group 1 1 ) 

Speed 

group 2 1 ) 

Analog 

group 1 1 ) 

Analog 

group 2 1 ) 

Switch 

group 1 1 ) 

Switch 

group 2 1 ) 

Counter 

inputs 

A/D-converter 

10 bit 

Digital 

inputs 

Monitoring 

watchdog 


EPROM 

512 kBit 

EEPROM 

8 kBit 

RAM 

256 kBit 

Control unit 

for outputs 

Interface 

controller 


from all 

outputs 

D/A 

converter 

PWM output 

stages 

Switch output 

stages 

H bridge 

Outputs 

Interface 

driver 

0 

1 

2 

3 

0 

1 

Proportional 

solenoid 

outputs 


Output for 

STM actuator 2 ) 

Analog signal 

output 

RS232 serial 

interface 

CAN bus 

interface 3 ) 

1 ) For safety-related functions, the inputs should be duplicated. 

The group 1 inputs are isolated by the circuitry from the group 2 inputs. 

2) 

Not applicable to MC7S/21 

3) 

Not applicable to MC7S/21 and MC7M/21 


RE 95 050/05.00 

MC7E/21 - Terminal Connection Diagram 

This connection diagram is an example. 

Application-specific connection diagrams can be produced on request. 

fuse 

1 A 


+12V / +24V 

0V / ground 


sensor supply 

switches 

0 

1 

2 

0 

1 

2 

3 

+ 

4 

+ 

5 

+ 

6 

or 5 ) 

15 A 

fuse 

0V...5V 

0V...5V 

{ 

0 

1 

2 

3 

4 

5 

1 

2 

3 

4 

53 

18 

54 

20 

52 

17 

44 +4,5V 

45 

22 

24 

46 

15 

25 

47 

11 

21 

48 

12 

49 

13 

50 

14 

51 

16 

23 

35 

36 

37 

38 

39 

19 

+4,5V 

+4,5V 

+4,5V 

5) 

5) 

+5V 

5) 



5) 

5) 

5) 

5) 

5) 

5) 

TxD 

RxD 

28 

29 

30 

31 

32 

33 

41 

43 

34 

5 

4) 

4) 

4) 

4) 

4) 

4) 

0 

1 

2 

3 

0 

1 

M_ 

40 C 

42 

D 

10 

B 

E 

A 

G 

F 

proportional 

solenoids 

switching solenoids, 

relays, lamps, etc. 

analog signal output 

0 V...5 V DC 

3) 

STM actuator 6 ) 

RS 232 interfaces 

2) 

BB-3 


or 

PC with BODEM software 

signal ground 

connections 

(not for solenoids 

or battery) 

6 

7 

8 

9 

1) 

CAN H 

CAN L 

26 

27 

55 

CAN bus 

interface 7 ) 


ground 

2) The BB-3 connecting cable or BODEM connecting cable, are not 













6 ) Not applicable to MC7S/21 

7) Not applicable to MC7S/21 and MC7M/21 





RE 95 050/05.00 

MC7E/21 - Unit Dimensions 



51 

153,2 

5,3 15 

7,5 

159 

199 

7,5 

ca.300 

approx. 

198 

25,5 

Plug Contacts 

1 

27 

28 55 

The AMP timer connector for MC7/21, consisting of: 












RE 95 050/05.00 

MC8/10 

The MC8/10 microcontroller is used for the programmable control of 

a maximum of three proportional solenoids and one additional 

switching function. It is therefore suitable for simple open or closed 

loop controls, e.g. for hydrostatic drive transmission for mobile 

machinery. For more extensive requirements, the MC7/21 or 

MC6/32 microcontrollers can be used. 

Internally, the MC8/10 microcontroller contains a high-speed 

16-bit processor and all input and output circuits on a single card. 



against overvoltage and electric interference. All potentiometer inputs 


circuits. 

As output signals, the output stages of the MC8/10 deliver closed 


for adjusting pumps, motors or valves. An additional power output 

is provided for directly switching relays, lamps and switching 

solenoids. 


STM actuators (RE 95120) for operating diesel engine fuel injection 

pumps. 







A CAN bus interface is available on the MC8/10 for data interchange 








– Robust design with specifications for mobile applications. 


– Inputs and outputs available with fault detection 

– Safety features, such as redundant inputs and central safety 

cut-out of all outputs 


hysteresis 





– Powerful 16-bit microcontroller module 






sensors 



connector 


RE 95 050/05.00 

MC8/10 - Block Circuit Diagram 

Battery 

+ 


cut-out 

Battery 

Speed 

inputs 1 ) 

Analog 

inputs 1 ) 

Switch 

inputs 1 ) 

+ 

- 

1 

2 

1 

2 

3 

4 

1 

2 

3 

4 

5 

6 

Voltage 

supply 

Inputs 

Speed 

group 1 1 ) 

Speed 

group 2 1 ) 

Analog 

group 1 1 ) 

Analog 

group 2 1 ) 

Switch 

group 1 1 ) 

Switch 

group 2 1 ) 

Counter 

inputs 

A/D-converter 

10 bit 

Digital 

inputs 

Monitoring 

watchdog 


Flash- 

EPROM 

1 MBit 

EEPROM 

16 kBit 

RAM 

32 kBit 

1 MBit 

Control unit 

for outputs 

Interface 

controller 


from all 

outputs 

D/A 

converter 

PWM output 

stage 

Switch output 

stage 

H bridge 

Outputs 

Interface 

driver 

1 

2 

3 

1 

Proportional 

solenoid 

outputs 

Switch output 

Output for 

STM actuator 

Analog signal 

output 

RS232 serial 

interface 

CAN bus 

interface 

1 ) Inputs for safety-related functions should be configured with sufficient redundancy. 

The group 1 inputs are isolated by the circuitry from the group 2 inputs. 


RE 95 050/05.00 

MC8/10 - Terminal Connection Diagram 

This connection diagram is an example. 

Application-specific connection diagrams can be produced on request. 

+12V / +24V 

0V / ground 

fuse 

1 A 


15 A 

fuse 

1 

28 

2 

3 

4 


outputs 

voltage supply 

29 

30 

4) 

1 

2 

proportional 

solenoids 

speed 

sensors 


1 

2 

1 

2 

3 

4 

+ 

54 

20 

52 

17 

44 +4,5V 

45 

22 

24 

46 

15 

25 

47 

11 

48 

12 

+4,5V 

+4,5V 

+4,5V 



31 

33 

41 

43 

4) 

4) 

4) 

3 

1 

M_ 

switching solenoids, 

relays, lamps, etc. 

STM actuator 

sensor supply 6 ) 

21 

+5V 

34 

5 

analog signal output 

0 V...5 V DC 

switches 

or 5 ) 

{ 

1 

2 

3 

4 

5 

6 

35 

36 

37 

38 

39 

19 

5) 

5) 

5) 

5) 

5) 

5) 

TxD 

RxD 

CAN H 

CAN L 

40 C 

42 

DBEAGF 

10 

26 

27 

55 

3) 

CAN bus 

interface 

RS 232 interfaces 

2) 

BB-3 


or 

PC with 


1) 


ground 














6 ) Not permanently short-circuit-proof against ground 

Note to 2 ) and 3 ): 




RE 95 050/05.00 

MC8/10 - Unit Dimensions 



51 

153,2 

5,3 15 

7,5 

159 

199 

7,5 

ca.300 

approx. 

198 

25,5 

Plug Contacts 

1 

27 

28 55 

The AMP timer connector for MC8/10, consisting of: 












RE 95 050/05.00 

Test Adapter 

For the electrical monitoring of the input and output signals, a test adapter (MA) can be 

inserted at every plug-in connection between the MC microcontroller and the mating 

connector. 


Order designation: MA1-MC/11 

Safety Concept for the MC6, MC7, MC8 

Safety features in the microcontroller 

– The input circuits for speed, analog or switching signals are electrically separated into mutually independent groups (see block circuit 

diagrams). Faults can be detected by the microprocessor by means of duplicated (redundant) input function assignments. 

– Cable breakage or short-circuiting at potentiometers can be detected by circuit logic. 

– Faults in the voltage supply are detected by the microprocessor. 

– All output signals can be "read back" by the microprocessor with appropriate software. 

– Independently of the overall voltage supply, the power outputs are supplied by separate connections on the MC. For service purposes, 

the microcontroller can be run with all power outputs de-energized (in the case of the MC7, this feature is only possible with internal 

cut-off). 

– The internal watchdog module centrally cuts off all outputs in the event of program execution errors. 

Safety precautions in the use of the microcontrollers 

(see also safety instructions RDE 90301-01) 

– By means of duplicated input variable assignments (e.g. connection of the drive pedal signal to two independent analog inputs), faults 

can be detected and special programmed safety functions can be activated. 

– If the plausibility check reveals discrepancies between the setpoints and the values read back by the processor, special safety functions 

can be activated. 

– In the event of a fault, all power outputs are cut off. When designing the hydraulic system, safe performance of the machine must be 

ensured in the electrically de-energized state (e.g. braking to standstill). 

Notes: 

– The suggested circuits do not imply any technical liability of Brueninghaus Hydromatik for the system. 

– The safety measures laid down in RDE 90301-01 must be observed. 

– To switch off the system in emergencies, the power supply to the electronic controls must be disconnected by an 

emergency stop switch. The emergency stop switch must be installed in an easily accessible position for the operator. 

Safe braking must be ensured when the emergency stop function is activated. 

– Lines to speed inputs must be screened. This screen must either be connected on one side to the electronics or by means 

of a low impedance connection to the vehicle earth. 

– Lines to the electronic controls must not be routed close to other conducting lines in the machine. 

– A sufficient distance to radio systems must be maintained. 

– During electrical welding operations, all connectors must be unplugged from the electronic unit. 

– The electronic unit must only be tested with connected proportional solenoids. 

– The proportional solenoids must not be connected to spark suppression diodes. 

– Switching solenoids at the outputs of the MC electronic unit and other inductive loads in the system must be fitted with 

spark suppression diodes. 

– In order to preserve the warranty, any installation or replacement of MC software (in the EPROM or flash EPROM) must be 

carried out by Brueninghaus Hydromatik personnel. 

Brueninghaus Hydromatik GmbH 

Plant Elchingen 

Glockeraustraße 2 • D–89275 Elchingen 

Phone +49 (0) 73 08 82-0 

Telefax +49 (0) 73 08 72 74 

Internet: www.rexroth.com/brueninghaushydromatik / E-Mail: info@bru-hyd.com 

The specified data is for product description 

purposes only and may not be deemed to be 

guaranteed unless expressly confirmed in the 

contract. 

All rights reserved – Subject to revision 22/22 MC

Microcontroller MC - Bosch Rexroth

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