Device overview
ABB A41 312-100 is a single-phase, direct-connected DIN-rail meter for sub-metering, cost allocation, renewable-energy monitoring, and commercial or light-industrial energy management. Its exact order code is 2CMA170503R1000.
Core specifications
The meter accepts a direct circuit up to 80 A, so it does not need an external current transformer. It records active and reactive energy and exposes electrical measurements on its display and RS-485 interface. MID Class B / IEC Class 1 active-energy accuracy makes it suitable where a documented accuracy class matters; reactive energy is Class 2.
Installation and phase support
This is a four-module indoor DIN-rail device for single-phase 57.7-288 V AC line-to-neutral systems. Installation is a mains-panel task for a qualified electrician. Buyers should confirm local metering, sealing, protection, and certification requirements before using it for billing or regulated allocation.
Communication and local access
RS-485 supports Modbus RTU or ABB EQ Bus, while the front infrared interface supports ABB accessories. Metering and configuration do not require a vendor cloud. Home Assistant compatibility is conditional: use a suitable RS-485 adapter or gateway and create a manual Modbus register configuration from ABB's mapping tables.
Solar and import/export monitoring
Separate import and export registers support bidirectional energy accounting. This is useful for grid consumption, on-site generation, tenant sub-metering, and verifying energy flow. It measures energy direction; it does not control an inverter or enforce an export limit.
Selection notes
Choose A41 312-100 when you need an exact 80 A direct-connected single-phase meter with local Modbus and four-quadrant measurement. For higher-current circuits that use external CTs, or for three-phase systems, select a model designed for that sensing and phase topology.
Purchase and source notes
ABB Connect Netherlands lists the model as current but normally non-stocked, with an indicative 11-calendar-day lead time and a EUR 919 gross list price effective 2026-04-01. Confirm net price, taxes, certification, stock, and delivery with the local ABB channel.