User manual

Chapter 6: Connector Pin Assignments
The popular 9-pin D subminiature connector (male) is used for interfacing to communication lines. The
connectors are equipped with 4-40 threaded standoffs (female screw lock) to provide strain relief. The
connector labeled P2 is for COM A, and P3 is COM B.
Table 6-1: P2/P3 Connector Pin Assignments
Pin No. RS422 Four-Wire RS485 Two-Wire
1 Rx-
2 Tx+ T/Rx+
3 Tx- T/Rx-
4 Not Used
5 Isolated GND Isolated GND
6 Not Used
7 Not Used
8 Not Used
9 Rx+
Note
If the unit is CE-marked, then CE-certifiable cabling and breakout methodology (cable shields grounded
at the connector, shielded twisted-pair wiring, etc) must be used.
Manual 104-ICOM-2S, 104-COM-2S 22