EM111 | Sofar EMS Documentation

Supported Devices

Device Type	Modbus TCP (Ethernet)	RS485
Carlo Gavazzi EM111	❌	✅

Wiring

RS485

RS485 Wiring

For correct RS485 wiring: follow the RS485 wiring guidelines.
If the wiring shown in the table below is incorrect, please let us know.
There is no general industry consensus on the use of A and B for RS485 polarity, so the naming may be counterintuitive for some devices.

Device	Sofar EMS model OM1	Sofar EMS model IG8	RS485-USB converter	RS485-Ethernet converter
Terminal 8 / A-	RS485 A	RS485_POS	RS485 A	TX+
Terminal 6 / B+	RS485 B	RS485_NEG	RS485 B	TX-
N/A	RS GND	GND	Not available	G

Configuration

Check that the Carlo Gavazzi meter is set to read both import and export power. An unsuitable mode may lead to:

Missing readings of feed-in, or
Feed-in being counted as offtake (on top of the ‘actual offtake’)

You can set this in the ‘MEASurE’ configuration menu on the energy meter. This should be set to ‘b’.

Warning

This setting may not be present on MID certified models (model numbers ending in PFA and PFB).

NOTE: RS485 Device Addresses

You MUST give each device a unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the Sofar EMS will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The Sofar EMS will scan those first.

Set the Modbus address through the power meter's “Address” configuration menu.

Last updated August 24, 2026

Supported Devices

Device Type	Modbus TCP (Ethernet)	RS485
Carlo Gavazzi EM111	❌	✅

Wiring

RS485

RS485 Wiring

For correct RS485 wiring: follow the RS485 wiring guidelines.
If the wiring shown in the table below is incorrect, please let us know.
There is no general industry consensus on the use of A and B for RS485 polarity, so the naming may be counterintuitive for some devices.

Device	Sofar EMS model OM1	Sofar EMS model IG8	RS485-USB converter	RS485-Ethernet converter
Terminal 8 / A-	RS485 A	RS485_POS	RS485 A	TX+
Terminal 6 / B+	RS485 B	RS485_NEG	RS485 B	TX-
N/A	RS GND	GND	Not available	G

Configuration

Check that the Carlo Gavazzi meter is set to read both import and export power. An unsuitable mode may lead to:

Missing readings of feed-in, or
Feed-in being counted as offtake (on top of the ‘actual offtake’)

You can set this in the ‘MEASurE’ configuration menu on the energy meter. This should be set to ‘b’.

Warning

This setting may not be present on MID certified models (model numbers ending in PFA and PFB).

NOTE: RS485 Device Addresses

You MUST give each device a unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the Sofar EMS will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The Sofar EMS will scan those first.

Set the Modbus address through the power meter's “Address” configuration menu.

Last updated August 24, 2026

Supported Devices

Wiring

RS485

RS485 Wiring

Configuration

Warning

NOTE: RS485 Device Addresses

On this page

Supported Devices

Wiring

RS485

RS485 Wiring

Configuration

Warning

NOTE: RS485 Device Addresses

On this page