How much power does the metering module consume

Typical metering modules, such as the IM1281B, consume very low power, often under 10 mA at 3. 3–5 V DC, making them suitable for continuous monitoring applications. IM1281B Metering ModuleThe IM1281B single-phase AC energy metering module is designed for industrial and commercial monitoring applications, including EV chargers, street lamps, and base stations.

It operates on a DC supply of 3. 3–5. 0 V and has a typical power consumption of ≤10 mA, which translates to approximately 33–50 mW under normal operation.

The module features full isolation for voltage and current sampling, ensuring safety and reliability while maintaining low energy usage. It supports communication via MODBUS-RTU and DL/T645-2007 protocols and provides real-time data updates with a refresh interval of ≥250 ms. SEM3 Embedded Micro Metering ModuleThe SEM3 module from Siemens is designed for integration into panelboards and switchboards for commercial and residential sub-billing applications.

While the exact current draw is not specified in the publicly available documentation, SEM3 is engineered for low-power operation to allow continuous monitoring of up to 45 poles per controller without significant energy overhead. Its compact design reduces the need for additional hardware, contributing to overall energy efficiency.

Io

T Energy Metering ModulesIoT-based metering modules, such as those from Novunex, are designed to monitor electricity, solar PV, gas, and heat pumps. These modules are optimized for low-power operation to support continuous data collection and remote monitoring. They typically operate on low-voltage DC supplies and are suitable for integration into existing systems without significantly increasing energy consumption.

Key Considerations

Voltage and Current Requirements: Most modern metering modules operate on 3. 3–5 V DC with minimal current draw (often