User`s guide

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1. Connecting The Serial MODBUS Gateway Hardware
1. Connect Antenna
2. Use communication select jumper to set RS-485 or RS-232C
3. Connect wires from MODBUS to SCADA / PLC / Master
SMG 5-Wire Connector
Red: 4.5 – 36 VDC
Black: Power ground
Orange: RS-232C: TXD gateway’s transmitter data connection.
Connect the MODBUS master’s receiver.
RS-485: D+ Non-inverting 485 transmitter/receiver.
White: Signal ground, internally connected to power ground.
Green: RS-232C: RXD gateway’s receiver data connection.
Connect the MODBUS master’s transmitter.
RS-485: D- Inverting 485 transmitter/receiver.