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Schneider MP3250 Power Analyzer

This guide will show you how to connect the Polar Monitoring Gateway to the Schneider MP3250 Power Analyzer. It will also take you through the setup and parameters required on the MP3250 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 Schneider MP3250  Serial Parameters

Schneider MP3250 Connection Setup

Scheneider 3250 Wiring Diagram
Wiring Diagram
1. Connect power to the Gateway
Power Polar Gateway
Power the 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
Polar Gateway RS-485
Scheneider 3250 RS-485 Wiring

Wire the RS-485 cable to allow communication with the Polar Gateway. Connect A+ => D1/+ and B- => D0/-.

3. 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.
  • 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 Schneider MP3250. 

5. Configure Schneider MP3250 Serial Parameters
In order for the Gateway to correctly communicate with the MP3250 controller, there will need to be some changes made to the communication parameters. 

Note: Before communicating with the device using Modbus protocol, use the HMI to change the default communication settings to reflect the table below.

Serial Communication Setup

Communication AddressDevice ID/Unit ID/Node IDAddress11
Serial SpeedCommunication SpeedBaud Rate192009600
ParityError-checking processParityEven, 1None, 1

Note: By default, the MP3250’s data bits is set to an 8 bits.

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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