The Siemens 7KM2200-2EA40-1CA1 is a SENTRON PAC2200 energy meter for 3-phase low-voltage systems up to 400 V. Unlike the transformer-rated 2EA30 variants, this 2EA40 model provides 65 A direct measurement — the load current passes through the meter itself, eliminating the need for external current transformers. The M-Bus interface enables integration into building automation and utility metering networks.

65 A Direct Measurement: Simpler Installation

Direct measurement means the meter connects directly in series with the load — no external CTs to specify, mount, wire, or verify. This simplifies installation, reduces component count, and eliminates CT ratio errors from the measurement chain. The 65 A rating covers the majority of sub-distribution feeders, lighting circuits, HVAC panels, and small motor loads found in commercial and industrial buildings.

M-Bus for Building Management Systems

The M-Bus interface connects directly to M-Bus master devices and data concentrators — the standard infrastructure for remote meter reading in commercial buildings and multi-tenant facilities. Without MID certification, this variant is positioned for internal energy monitoring and cost allocation rather than revenue billing.

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