User`s manual

MGate MB3000 User’s Manual Hardware: MB3170, MB3170I
6-5
Pin Assignments
DB9 (Male)
The MGate MB3170 and MB3170I use a DB9 (male) serial port for RS-232 connections to Modbus
RTU or ASCII devices.
15
69
Pin RS-232
1 DCD
2 RxD
3 TxD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
Terminal Block (RS-422, RS-485)
The MGate MB3170 and MB3170I use a terminal block connector for RS-422 and RS-485
connections to Modbus RTU or ASCII devices.
Pin
RS-422
RS-485 (4W)
RS-485 (2W)
1 TxD+ ---
2 TxD- ---
3 RxD+ Data+
4 RxD- Data-
5 GND GND
Power Input, Relay Output
V2+ V2-
V1+ V1-
Shielded
Ground
DC Power
Input 1
DC Power
Input 1
Relay
Output
Relay
Output
DC Power
Input 2
DC Power
Input 2