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APPENDIX E
Main Bay Rear Panel Connector Pinouts
Console Port RS-232 Pinouts
Pin # Designation
1 CHASSIS GND
2 Rx
3 Tx
4 CTS
5 RTS
6 NO CONNECTION
7 DATA GND
8 NO CONNECTION
9 NO CONNECTION
Alarm Port RS-232 Pinouts
Pin # Designation
1 RTS
2 Tx
3 CHASSIS GND
4 DATA GND
5 DATA GND
6 Rx
7 CTS
8 12 VAC
9 12 VAC
Keyboard RS-485 Ports
Pin # Designation
1 12 VAC
2 GND
3 -DATA
4 +DATA
5 GND
6 12 VAC
Printer Port RS-232 Pinouts
Pin # Designation
1 CHASSIS GND
2 Rx
3 Tx
4 CTS
5 RTS
6 NO CONNECTION
7 DATA GND
8 NO CONNECTION
9 NO CONNECTION
Code Port Pinouts
Pin # Designation
1 +DATA
2 -DATA
3 GND
4 GND
5 GND
6 NO CONNECTION
7 NO CONNECTION
8 12 VAC
9 12 VAC
COMM PORT 1 And COMM PORT 2
(Not Applicable To All Systems)
Pin # Designation
1 CHASSIS GND
2 +TXD
3 -TXD
4 +RXD
5 -RXD
6 GND
7 GND
8 GND
9 GND
For reference, a cable (part number 303 0753 003) to connect
the Allegiant’s CONSOLE port to an external PC would use the
following pinouts:
9-Pin Male Allegiant 9-Pin Female
(CONSOLE) Designation (PC Side)
1 Chassis GND None
2 Receive Data 3
3 Transmit Data 2
4 CTS 1
5 RTS 8
6 No Connection None
7 Data GND 5
8 No connection None
9 No connection None
(pins 4 & 6 jumpered)
(pins 1 & 7 jumpered)
For reference, a cable (part number 303 0753 002) to connect
the Allegiant’s PRINTER port to an external serial printer would
use the following pinouts:
9-Pin Male Allegiant 25-Pin Male
(PRINTER) Designation (Printer Side)
1 Chassis GND 1
2 Receive Data 2
3 Transmit Data 3
4 CTS 4,8
5 RTS 5
6 No Connection None
7 Data GND 7
8 No connection None
9 No connection None
(pins 6 & 20 jumpered)
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