Com Port Connector - Protech Systems PMB-531LF User Manual

Chapter 2 Hardware Configuration

2-4. COM PORT CONNECTOR

COM1 : COM1 Connector
COM1 is fixed as RS-232.
The pin assignment is as follows :
PIN
1
2
3
4
5
6
7
8
9
COM2 : COM2 Connector
The COM2 is selectable as RS-232/422/485.
The pin assignment is as follows :
PIN
RS-232
1 DCD2
2 RX2
3 TX2
4 DTR2
5 GND
6 DSR2
7 RTS2
8 CTS2
9 RI2
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ASSIGNMENT
DCD1
RX1
TX1
DTR1
GND
DSR1
RTS1
CTS1
RI1
ASSIGNMENT
RS-422
TX-
TX+
RX+
RX-
GND
RTS-
RTS+
CTS+
CTS-
RS-485
TX-
TX+
RX+
RX-
GND
NC
NC
NC
NC
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