Com2 Rs232 Connector; Com3 Rs232/Rs422/Rs485 Connector - Nexcom nROK 7251 Series User Manual

Chapter 2: External Connectors Pinout Description

COM2 RS232 Connector

Connector number: 14
1 5
1 5
6 9
6 9
Pin Definition
1 DCD
3 TXD
5 ISO_GND
7 RTS
9 RI
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Pin Definition
2 RXD
4 DTR
6 DSR
8 CTS

COM3 RS232/RS422/RS485 Connector

Connector number: 15
1 5
1 5
6 9
6 9
Pin Definition
RS232 DCD#/RS422 TX- /
1
RS485_DATA-
3 RS232 TX/RS422_RX+
5 GND
7 RTS#
9 RI
17
Pin Definition
RS232 RX/RS422_TX+ /
2
RS485_DATA+
4 RS232 DTR#/RS422_RX-
6 DSR#
8 CTS#
nROK 7251 Series User Manual