ABB – B21 111‑100 (2CMA100149R1000) – 1‑Phase LCD Energy Meter, 5 A – 65 A

The ABB B21 111‑100 (2CMA100149R1000) is a compact, DIN‑rail mountable single-phase energy meter designed for residential and commercial use. Equipped with a backlit LCD and infrared communication, it measures active energy and supports configurable pulse output or alarm functions. Approved to MID Class B, it’s ideal for sub-metering, HVAC, and facility management.

Key Features:

• Model: B21 111‑100 (ABB 2CMA100149R1000)  

• Measurement: Single-phase active energy (direct connected)

• Rated Current: 5 A nominal; up to 65 A max  

• Supply Voltage: 220–240 V; 50/60 Hz (range 176–276 V)  

• Accuracy: Class B (±1%, MID-certified)  

• Display: 6‑digit backlit LCD; shows energy, voltage, current, power, frequency; includes min/max recording, 25 user alarms  

• Outputs & Interface: 1 configurable output (pulse or alarm), infrared port for external reading/commissioning (e.g., KNX)  

• Mounting & Dimensions: DIN‑rail; 35 × 97 × 65 mm; 0.14 kg; 2‑unit width  

• Operating Conditions: –40 °C to +70 °C; IP20 housing; glass/PC front window

• Standards & Compliance: IEC 50470‑1; MID; CE; RoHS; pulse output type S0; 1‑tariff metering