Switch Setting Of Rs-485 Serial Port (Com1) & Rs-4222/485 Serial Port (Com2); Rs-232 Serial Port (Com3) - Advantech UNO-1251G User Manual

A.3 Switch setting of RS-485 Serial Port (COM1) &
RS-4222/485 Serial Port (COM2)
SW
Description
Default
Termination resistor ON COM1 RS485: Contact to Pin 8,
RS-422 master mode
A.4

RS-232 Serial Port (COM3)

Table A.3: Connectors and Jumpers
Pin
1
2
3
4
5
6
7
8
9
UNO-1251G User Manual
SW7
COM1 RS485; COM2 RS422/485 termination resistor setting
COM2 RS422/485 mode setting
1. Termination resistor ON
2. COM2 RS-422 mode (contact to Pin 5, 6, 7, 8)
COM2 RS485: Contact to Pin 7,
COM2 RS422 Tx: Contact to Pin 7,
COM2 RS422 Rx: Contact to Pin 6
(if switch to termination resistor OFF, Contact
to Pin 1, 2, 3)
Contact to Pin 5
(if switch to RS-422 slave mode/RS-485,
contact to Pin4)
Description
DCD
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
20