User`s guide
Connecting to the Serial MODBUS Gateway
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 – 36VDC
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.
Serial MODBUS Gateway - Indicator Lights
System - Indicates gateway status. A green light
indicates ready and working, a red light indicates
there is a hardware problem.
Wired - Indicates connectivity with MODBUS system.
A green light indicates ready and working, a red light
indicates there is a problem. A ashing green light indicates active
communication.
Wireless - Indicates wireless sensor network activity. A green light
indicates ready and working, a red light indicates that no network
has been formed (no sensors are registered). A ashing green light
indicates radio trafc from the sensors.
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Green - Receive
White - Signal Ground
Orange - Transmit
Black - Power Ground
Red - 4.5 - 36 VDC
RS-485 /
RS-232C
Select
Reset Jumper
Serial MODBUS Gateway
for Wireless Sensors
System
Wired
Wireless
L
L
L