P1 Modbus Dongle

P1 Modbus Dongle

The Modbus P1 Dongle is a device that enables communication between your TeltoCharge EV charging station and a smart meter using the Modbus RS-485 protocol. This setup is essential for accurately monitoring and controlling the energy usage during EV charging sessions.

Smart Meter Connection

The dongle is connected to the P1 port of the smart meter via a provided P1 cable. This connection allows the dongle to read energy consumption data directly from the smart meter:

   === RS-485 Connection ===

The dongle features RS-485 terminals which are critical for establishing communication with the TeltoCharge system. These terminals are usually labeled as Ground (GND), A+ (positive differential signal), and B- (negative differential signal).

To connect the dongle to the TeltoCharge system, you'll need to use an appropriate RS-485 cable:

Connect the 'A+' terminal of your cable to the 'A+' port on the TeltoCharge device.

Connect the 'B-' terminal of your cable to the 'B-' port on the TeltoCharge device.

In case of communication errors, swapping the 'A+' and 'B-' connections might resolve the issue./p>