The ABB B ‑ (CMAR) is a compact, direct-connected, single-phase energy meter designed for DIN-rail mounting. With a backlit -digit LCD, RS‑ Modbus communication, and programmable pulse output or alarm, it’s ideal for sub-metering, HVAC systems, and industrial energy monitoring. MID and IEC approved for Class B accuracy.

Key Features

Model: B ‑ (ABB P/N CMAR)
Type: Single-phase DIN-rail active energy meter, direct-connected (no CTs)
Current Range:  A nominal, up to  A max; starting current < . A
Voltage Range: – V AC (nominal – V), / Hz
Accuracy: Class . active energy (MID Class B, ±%)
Display: -digit back-lit LCD with navigation buttons for browsing instruments, alarms, and logs
Outputs/Comm:
- configurable pulse/alarm output (S type)
- RS‑ Modbus RTU (EQ-Bus compatible)
Metering & Alarms: Measures voltage, current, power, energy, frequency, power factor; user alarms; event logging
Environmental Specs: – °C to + °C; IP housing (plastic); fire-resistant terminals
Standards: IEC ‑, IEC ‑, EN ‑/; MID //EC certified
Physical Dimensions:  ×  ×  mm ( DIN units); . kg
Connection Capacity: Main circuit: – mm²; comm: .– mm²; torque: main  Nm, comm . Nm

1xPcs ABB B21 112-100 (2CMA100150R1000) – Single-Phase DIN-Rail LCD Energy Meter

1xPcs ABB B21 112-100 (2CMA100150R1000) – Single-Phase DIN-Rail LCD Energy Meter