14
Comm 2 defaults to NGC Interface, communicates via Modbus and
functions as a Modbus Slave.
Both communication ports (Comm 1 and Comm 2) can function as RS-
232, RS-422 or RS-485. The following table details the connections for
remote communications.
Comm 1 and Comm 2 Pin-Outs/Terminations
RS232 RS485 RS422
PIN COMM 1 (J8) COMM 1 (J8) COMM 1 (J8)
1 Power Out Power Out Power Out
2 Ground Ground Ground
3 Switched Power Out Switched Power Out Switched Power Out
4 Operate Operate Operate
5 Not Used RRTS RTS
6 Request To Send Bus + Transmit Bus +
7 Transmit Data Bus - Transmit Bus -
8 Receive Data No Connection Receive Bus +
9 Clear To Send (CTS) No Connection Receive Bus -
COMM 2 (J10) COMM 2 (J10) COMM 2 (J10)
1 Power Out Power Out Power Out
2 Ground Ground Ground
3 Switched Power Out Switched Power Out Switched Power Out
4 Operate Operate Operate
5 Not Used RRTS RTS
6 Request To Send Bus + Transmit Bus +
7 Transmit Data Bus - Transmit Bus -
8 Receive Data No Connection Receive Bus +
9 Clear To Send (CTS) No Connection Receive Bus -
TERMINATIONS Comm 1 (J9) Comm 2 (J11)
First or Intermediate Unit (RS-485) Pins 2–3 Pins 2–3
Last or Only Unit (RS-485) Pins 1–2 Pins 1–2
RS232 Pins 2–3 Pins 2–3
All communication parameters are found in the Setup tabs for each
instantiated Communication application in PCCU32. Systems are
shipped with default settings for communications but may need further
modification. For additional information, please refer to the NGC8206
User’s Manual.
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