User manual

6-1
Manual MICOM-2S.Eb
Chapter 6: Connector Pin Assignments
The popular 9-pin D subminiature connector is used for interfacing to communication lines. The
connector is equipped with 4-40 threaded standoffs (female screw lock) to provide strain relief.
Pin No. RS422 RS485
1 Rx- Receive Data (Complementary Input) TRx-
2 Tx+ Transmit Data (Output)
3 Tx- Transmit Data (Complementary
4 Not Used
5 Gnd Isolated Common (Ground) Ground
6 +5V Isolated 5V Supply
7 RTS Request to Send (Output)
8 CTS Clear to Send (Input)
9 Rx+ Receive Data (Input) TRx +
Table 6-1: Connector Pin Assignments
Note
For Simplex, Half-Duplex, and Full-Duplex operation, see the Option Selection chapter of this manual
for pin connection information.
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.