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Chapter 2 Hardware Configuration
PMB-531LF USER
′
S MANUAL
Page: 2-7
COM3 : COM3 Connector
COM3 is fixed as RS-232.
The pin assignment is as follows :
PIN ASSIGNMENT
1 DCD3
2 RX3
3 TX3
4 DTR3
5 GND
6 DSR3
7 RTS3
8 CTS3
9 RI3
10 NC
COM3’s pin 9 is selectable for RI, +5V or +12V. For more information,
please refer to our “2-5 COM RI and Voltage Selection”.
COM4 : COM4 Connector
COM4 is fixed as RS-232.
The pin assignment is as follows :
PIN ASSIGNMENT
1 DCD4
2 RX4
3 TX4
4 DTR4
5 GND
6 DSR4
7 RTS4
8 CTS4
9 RI4
10 NC
COM4’s pin 9 is selectable for RI, +5V or +12V. For more information,
please refer to our “2-5 COM RI and Voltage Selection”.