Com Port Connector - Protech Systems PPC-7400 Operation Manual

Chapter 2 Hardware Configuration

2-4. COM PORT CONNECTOR

There are four COM ports enhanced in this board namely: COM1,
COM2, COM3 and COM4. COM1, COM3 and COM4 are fixed for
RS-232, while COM2 is selectable for RS-232/422/485.
COM1 : COM1 Connector
The COM1 Connector assignments are as follows :
PIN ASSIGNMENT
1 NDCDA
2 NSINA
3 NSOUTA
4 NDTRA
5 GND
6 NDSRA
7 NRTSA
8 NCTSA
9 RIN1
COM2 : COM2 Connector
The COM2 Connector assignments are as follows :
PIN
RS-232
1 NDCDB
2 NSINB
3 NSOUTB
4 NDTRB
5 GND
6 NDSRB
7 NRTSB
8 NCTSB
9 RIN2
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ASSIGNMENT
RS-422 RS-485
TX- TX-
TX+ TX+
RX+ RX+
RX- RX-
GND GND
RTS- NC
RTS+ NC
CTS+ NC
CTS- NC
COM1
COM2
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PPC-740X USER S MANUAL