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Lovato RGK750 Generator Controller

This guide will show you how to connect the Polar Monitoring Gateway to the Lovato RGK750 Generator Controller. It will also take you through the setup and parameters required on the Lovato RGK750 to ensure communications to the Polar Gateway.

Steps to follow:

  1. Connect power to the Gateway.
  2. Connect RS-485.
  3. Mount the EXP 1012 to the module expansion slot.
  4. Final checks.
  5. Power on the system.
  6. Configure the RGK750 Serial Parameters

Lovato RGK750 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. Connect A+ => A and the B- => B.

3. Mount the EXP 1012 to the module expansion slot.

Open any of the four available module expansion slots of the RGK750 and clip in the EXP 1012 RS-485 communication module.

4. Final checks
Before you switch on the Gateway and the device make sure you have done everything correctly in the previous steps.
  • Make sure the wiring is secure – 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 device.
  • Make sure the RS-485 module is correctly mounted on the device. 
  • Re-check the RS-485 twisted pair cable is correctly wired.
5. Power on the system

Now you are ready to go, you can now switch on the Polar Gateway and the RGK750.  

6. Configure RGK750 Serial Parameters
In order for the Gateway to correctly communicate with the Lovato RGK750 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 AddressNode Serial AddressP20.n.0111
Serial SpeedBaud RateP20.n.0296009600
Data FormatCommunication ParityP20.n.038bit – n8bit-n (No Parity)
Stop bitsCommunication Stop BitsP20.n.0411
ProtocolCommunication protocolP20.n.05(Various)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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