Below the devices is the connection panel for measuring voltage and tariff relay:

Measuring voltage
The connection of the measuring voltage is already integrated in the setting gauges. Normally this eliminates manual wiring. For special cases additional voltage connections are available.

Tariff relay
Via controlled connections, up to three tariff relay inputs can be connected. The applied tariff voltage is identical to the measuring voltage. Optionally, customer-specific tariff voltages can also be output.