Hager

Teleport can connect to the Hager ECR300C series energy meters using Modbus RTU over the RS-485 serial interface. For additional information, please refer to the official documentation.

Supported models

• ECR300C — 3-phase CT meter, screw terminals, magnitude summation (WELMEC)
• ECR301C — Swiss market variant (no reactive energies on display)
• ECR302C — Vectorial summation (ARN) variant

Note

The Hager ECR300C is a CT-connected meter. It does not measure current directly — it requires external current transformers (CTs) with a 1 A or 5 A secondary output wired to the S1/S2 terminals on each phase. The CT ratio must be configured via the front-panel display before commissioning.

Configuration

Modbus RTU over RS-485

1. Connect the RS-485 serial cable between the serial port of the Teleport and the RS-485 terminal block of the Hager meter. The terminal block is labelled −, +, and 0 (Data−, Data+, and Signal Ground respectively).

2. Configure the CT ratio on the meter via the front-panel display. Navigate using the three buttons (OK, SCROLL, ESCAPE):

   • From the main page, press SCROLL to navigate to Configuration.
   • Press OK to enter, then scroll to Meter type / CT settings.
   • Set the CT primary (e.g. 400 for a 400/5 A CT) and CT secondary (1 or 5) to match your installed current transformers.
   • Press OK to confirm each value.

3. Configure the Modbus communication parameters on the meter. Still within the Configuration menu, scroll through and set each parameter:

   • Modbus address: 1
   • Baud rate: 19200
   • Parity: None
   • Stop bit: 1

   Press OK to confirm each value. Press ESCAPE to return to the main page.