ABB – B21 312-100 (2CMA100155R1000) – 1-Phase Direct-Connected Energy Meter, 65A

Manufacturer & Model: ABB B ‑, internal code CMAR  

Measurement Type: Single-phase direct‑connected meter for currents up to  A  

Accuracy: Class  for active energy (or Class B under MID), Class  for reactive energy  

Display & Readings: -digit backlit LCD displaying active/reactive energy (import/export), power, current, voltage, frequency, power factor, apparent power  

Tariffs & Counters:

• Supports intermediate counters, up to tariffs

• Built-in real-time clock  

Inputs & Outputs:

• general-purpose inputs and outputs — configurable as pulse outputs (energy) or alarm outputs

• Up to alarm thresholds with time delays  

Communication:

• RS‑ with Modbus RTU/EQ‑Bus

• Infrared interface for optional KNX connection  

Standards & Certification: IEC ‑/-‑/-‑, EN ‑/-; MID‑approved  

Physical Specs:

• DIN‑rail, TE width ( mm), IP; compact housing (×× mm), weight ~. kg  

• Operating – °C to + °C  

Pulse Output: Programmable rate (– imp/kWh/min/Wh), pulse width – ms