Com Port Connector - Protech Systems PMB-881LF 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
1 COM2_DCD#
2
3
4 COM2_DTR#
5
6
7
8
9
10
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ASSIGNMENT
COM1_DCD#
COM1_RX
COM1_TX
COM1_DTR#
GND
COM1_DSR#
COM1_RTS#
COM1_CTS#
COM1_RI#
ASSIGNMENT
RS-232
COM2_RX
COM2_TX
GND
COM2_DSR#
COM2_RTS#
COM2_CTS#
COM2_RI#
NC
RS-422 RS-485
TX- TX-
TX+ TX+
RX+ RX+
RX- RX-
GND GND
RTS- GND
RTS+ GND
CTS+ GND
CTS- GND
NC NC
COM2
PMB-881LF USER
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S MANUAL