Chapter 2 Hardware Configuration
Page: 2-6 PSB-1688LF USER
′
S MANUAL
COM1 : COM1 Connector, fixed as RS-232.
The pin assignment is as follows :
PIN ASSIGNMENT
1 NDCDA
2 NSINA
3 NSOUTA
4 NDTRA
5 GND
6 NDSRA
7 NRTSA
8 NCTSA
9 JNRIA
COM2 : COM2 Connector, selectable as RS-232/422/485.
The pin assignment is as follows :
PIN ASSIGNMENT
RS-232 RS-422 RS-485
1 NDCDB TX- TX-
2 NRXDB TX+ TX+
3 NTXDB RX+ RX+
4 NDTRB RX- RX-
5 GND GND GND
6 NDSRB RTS- NC
7 NRTSB RTS+ NC
8 NCTSB CTS+ NC
9 JNRIB CTS- NC
10 NC NC NC
All COM port’s pin 9 is selectable for RI, +5V and +12V.
For more information, please refer to our “COM Port RI &
Voltage Selection”.