Lovato DMED301 Electricity Meter
This guide will show you how to wire the Polar Monitoring Gateway to the Lovato DMED301 electricity meter. It will also take you through how to setup the parameters required on the Lovato DMED301 to ensure communications to the Polar Gateway.
Steps to follow:
- Connect power to the Gateway.
- Connect RS-485.
- Final checks.
- Power on the system.
- Configure the DMED301 Serial Parameters
Lovato DMED301 Connection Setup
1. Connect power to the 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
Wire the RS-485 cable to allow communication with the Polar Gateway. Connect A+ => A and the B- => B.
3. Final checks
- 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.
- Re-check the RS-485 twisted pair cable is correctly wired.
4. Power on the system
Now you are ready to go, you can now switch on the Polar Gateway and the DMED301.
5. Configure DMED301 Serial Parameters
Note: It is critical to change the default settings to reflect the table below.
Serial Communication Setup
| Name | Description | Parameter | Default | Required |
| Communication Address | Serial Slave ID | P8-01 | 1 | 1 |
| Transmission Speed | Baud Rate | P8-02 | 9600 | 9600 |
| Communication Protocol | Data Format | P8-03 | 8bit – n | 8bit – n |
| Stop Bits | Communication Stop Bits | P8-04 | 1 | 1 |
| Protocol | Communication Protocol | P8-05 | 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.