The Siemens 7KM3220-0BA01-1DA0 is a SENTRON PAC3220 energy monitor — a step above the PAC3120 in the SENTRON panel-mount portfolio. With a 96 x 96 mm form factor, IP65 front protection, and a graphical LCD, it is designed for control cabinet door installation in demanding industrial environments. The dual RJ45 Ethernet ports with Modbus TCP provide network redundancy, while the wide-range 100-250 V AC/DC auxiliary supply adapts to virtually any control panel voltage.

PAC3220 vs PAC3120: What the Upgrade Delivers

Compared to the PAC3120, the PAC3220 adds: dual Ethernet ports for redundant network topologies, a wider auxiliary supply range (100-250 V AC/DC vs 24-60 V DC), Class 0.5 accuracy for active energy (vs 0.5S), two digital inputs and two digital outputs (vs one each), and expandability via additional modules for analogue inputs, N-conductor direct measurement, and residual current monitoring. The PAC3220 is positioned for applications where measurement precision, network reliability, and future expandability are critical.

Wide-Range Auxiliary Supply for Flexible Deployment

The 100-250 V AC/DC supply range means this monitor can be powered from the same control voltage used for contactors, relays, and PLCs — whether that is 110 V AC, 230 V AC, or 24 V DC. No dedicated power supply or voltage converter is needed, simplifying panel design and reducing the bill of materials.

Decision Parameters