SW MODBUS
1 2 3
Pull-up resistor Pull-down resistor Terminator
ON 1 kΩ 1 kΩ 120 Ω
OFF 150 kΩ (default) 150 kΩ (default) – (default)
Pin Assignments
The MGate 5111 uses DB9 serial ports to connect to Modbus RTU or ASCII devices. Each port supports three
serial interfaces that is selected by software: RS-232, RS-422, and RS-485 (both 2 and 4-wire).
RJ45 (Ethernet, Console)
Pin Ethernet Console (RS-232)
1 Tx+ DSR
2 Tx- RTS
3 Rx+ GND
4 – TxD
5 – RxD
6 Rx- DCD
7 – CTS
8 – DTR