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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

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