Robustel M1000 User Guide - Manual (Page 17)

Robustel GoRugged M1000 User Guide
RT_UG_M1000 _v.2.0.0
20.12.2013 16 / 83
Confidential
2.6 Connect I/O Device and Sensors
Digital Input Dry Contact:
Digital Output (Sink Type)
2.7 Mount the Modem
Use 2 pcs of M3 screw to mount the modem on the wall.
PIN RS232 RS485 (2-wire) I/O
1 Data- (B)
2 RXD -> Data+ (A)
3 TXD <-
4 DO
5 GND GND
6 DI
7 RTS <-
8 CTS ->
9 IO GND