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

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.  

• 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