ICS Advent PCI-ICOM485/4, Product Manual

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Manual Number: 00650-148-1 Page 19
Chapter 6: Connector Pin Assignments
The popular 9-pin D sub-miniature connector is used for interfacing to communication lines. The
connector is equipped with 4-40 threaded standoffs (female screw lock) to provide strain relief.
Connector pin assignments are as follows:
Pin Connections
RS-485 PIN CONNECTIONS
COM Port A-D RS-485 Signals
Pin 1
Pin 2
Tx+ and Rx+
Pin 3 Tx- and Rx-
Pin 4
Pin 5
GND Ground
Pin 6
Pin 7
Pin 8
Pin 9
DATA CABLE WIRING
Signal Connector Pin Signal Connector Pin
COMA Tx+/Rx+ 37 COMC Tx+/Rx+ 27
COMA Tx-/Rx- 19 COMC Tx-/Rx- 9
COMA Gnd 18 COM C Gnd 8
COMB Tx+/Rx+ 32 COMD Tx+/Rx+ 21
COMB Tx-/Rx- 14 COMD Tx-/Rx- 3
COMB Gnd 13 COMD Gnd 2