Hardware Guide AG-811
PIN number
Function
Remark
4
DC +
Power supply positive
5
DC +
Power supply positive
6
TX-
Data
7
DC -
Power supply negative
8
DC -
Power supply negative
3.4.
RS485 – Modbus
The device has opto-isolated RS485 interface with support of Modbus RTU. It is dedicated to
energy meter, voltage meter and any Modbus device like PLC which support Modbus RTU
protocol. The device supports multiple Modbus devices with separate address range. It is
possible to directly send and receive any value of register from server. Please follow proper
connection of A and B signals from device to A and B signals in power meter. If the polarity is
reversed there will be no data transmission. All modbus configuration like baud-rate, parity,
address available in internal website.
The device provide on-board 120Ω termination resistor for RS-485 port.
3.5.
SIM card
The device support microSIM with voltage 1.8 and 3V. The card holder is push-in/push-out
type. Ensure inserting SIM card in proper direction according to the illustration.
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