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Lovato DMG700-900 Electricity Meter

This guide will show you how to connect the Polar Monitoring Gateway to the Lovato DMED700-900 electricity meter. It will also take you through the setup and parameters required on the Lovato DMG700-900 to ensure communications to the Polar Gateway.

Steps to follow:

  1. Connect power to the Gateway.
  2. Connect RS-485.
  3. Final checks.
  4. Power on the system.
  5. Configure the DMG700-900 Serial Parameters

Lovato DMG700-900 Connection Setup

Lovato DMG700-900- Wiring Diagram
Wiring Diagram
1. Connect power to the Gateway.
Power Polar Gateway

Wire the Polar Gateway to a 12-24 V DC power supply. Connect the positive wire to the positive terminal and the negative wire to the negative terminal.

2. Connect RS-485
RS-485 Connection
RS-485 Connection

Wire the RS-485 cable to allow communication with the Polar Gateway device. Connect A+ => A and the B- => B.

3. Final checks
Before you switch on the device make sure you have done everything correctly in the previous steps.
  • Make sure the power is OFF while doing the cable wiring.
  • Re-check if there are no short circuits.
  • Check if the power cables are not loosely wired to the Gateway.
  • Check if the power cables are not loosely wired to the Electricity Meter.
  • Re-check the RS-485 twisted pair cables is correctly connected A+ => A and B- => B.
4. Power on the system.

Now you are ready to go, you can now switch on the Polar Gateway and the DMED700-900.  

5. Configure DMED700-900 Serial Parameters
In order for the Gateway to correctly communicate with the Lovato DMG700-900 controller, there will need to be some changes made to the communication parameters. 

Note: It is critical to change the default settings to reflect the table below.

Serial Communication Setup






Communication Address

Node Serial Address




Serial Speed

Baud Rate




Data Format

Communication Parity


8bit – n

8bit-n (No Parity)

Stop bits

Communication Stop Bits





Communication protocol


Modbus RTU

Modbus RTU

You may now sign in to the Polar Portal to monitor the device remotely, the button on the right will take you through a setup process.

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