The Siemens 7KM2200-2EA30-1CA1 is a SENTRON PAC2200 energy meter for 3-phase low-voltage systems up to 400 V. It uses indirect current measurement via external x/5 A current transformers, making it adaptable to a wide range of feeder capacities. The device is self-powered from the measured voltage — no auxiliary supply wiring needed — and communicates via M-Bus for seamless integration into building automation and utility metering networks.

M-Bus: The Standard for Multi-Vendor Metering

M-Bus (Meter-Bus) is the European standard for remote meter reading, widely deployed in commercial buildings, residential complexes, and campus-style facilities. The 7KM2200-2EA30-1CA1 connects directly to M-Bus master devices and data concentrators without protocol converters or gateways. This makes it the correct choice when the energy meter must coexist with heat meters, water meters, and gas meters on a shared metering bus.

Self-Powered Operation

The meter draws its operating power directly from the measured voltage circuit, eliminating the need for a separate auxiliary supply. This simplifies wiring, reduces installation cost, and ensures the meter continues measuring even if the control panel auxiliary power fails — as long as the main voltage circuit is live.

Decision Parameters