
9. Appendices Vlinx MESR9xx Modbus Gateway
Page 76 Manual Documentation Number MESR9xx-0712m
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MESR902T-x Serial Port Pinouts
In the RS-422 mode, TX lines are outputs and RX lines are inputs. Connect the Modbus
gateway TXB(+) line to the RXB(+) line of the Modbus network, and the Modbus
gateway TXA(-) to the RXA(-) of the Modbus network.
Ground is signal ground and provides a common mode reference for the RS-422 Receiver
and Transmitters.
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