HME system 20 drive-thru timer system operations manual.pdf

VI.
ACCESSORIES
The following accessories are available for use with the HME System 20A.
They can be ordered by calling the HME Sales Department at (858) 535-6060.
1. VDB100/101 Vehicle detector board
2. DU1 or DU2 Ultrasonic vehicle detector
3. Remote display unit with 50 foot cable
4. Remote thermal printer with cable
(cable connects to 9-pin connector on top of System 20A control unit)
5. Thermal printer paper
6. RS232 computer (IBM compatible PC) serial port interface cable
(cable connects to 9-pin connector on top of System 20A control unit)
NOTE: The computer cable can be ordered from a computer hardware dealer
according to the following specifications.
!The cable must have a standard 9-pin male D-sub connector at one end, and a
9-pin or 25-pin female D-sub connector at the other end.
!Pin connections for the cable wires must be as shown below.
RX
TX
=
=
Receive Data
Transmit Data
RTS
CTS
=
=
Request To Send
Clear To Send
SG
DTR
=
=
Signal Ground
Data Terminal Ready
DSR = Data Set Ready
DB-25 connector
DB-9 connector
DB-9 connector
Figure 13.
RS232 cable connectors
DB-9 connector
39