LEM012SD is DIN rail single phase two wire active electronic energy meter. It adopts many advanced technologies of research and development, like microelectronic-techniques, specialized large-scale IC (integrated circuit), digital sampling and processing technology, SMT technique, and so on. The technical performances completely conform to International Standards IEC 62053-21 for Class 1 single phase active energy meter. It can directly and accurately measure the load active energy consumption in the single phase AC networks of rated frequency 50Hz or 60Hz. LEM012SD has features with excellent long-term reliability, small volume, light weight, perfect appearance, easy installation, etc.

Functions and features

√ Available as 35mm DIN standard rail mounted, conforming to Standards DIN EN 50022.
√ Single pole width (modulus 17.5mm), complying with Standards DIN43880.
√ Standard configuration 7+1 digits display (9999999.1kWh) without backlight LCD. May select 7+1 digits display (999999.1kWh) by white backlight LCD.
√ Standard configuration pulse output passive (polarity),May select distant pulse output passive (nonpolarity). And contact with all kind of AMR system conveniently,complying with standard IEC 62053-31 and DIN 43864.
√ Bicolor LED instructions power supply state (green) and signal of energy impulse (red).
√ Automatic detection the direction of the flow of load current. And Instructions on LED (when display HELP 1 on LCD, that means the reverse of the flow of load current).
√ Single direction measurement single phase two wire active energy consumption. It is nothing with direction of the flow of load current. Complying with standard IEC 62053-21.
√ Directly type S connection.
√ Extension terminals cover, in order to protect to use safety.

Technical parameters

    Technical parameters
Model Accuracy Reference voltage (V) Current specifications (A) Starting current (A) Insulation performance
LEM012SD Class 1 127 or 230 5(30) 5(32) 0.02 AC voltage 4kV for 1 minute, 
1.2/50us waveform impulse voltage 6kV.

Outer and mounting dimension

Outer and mounting dimension

Wiring diagram

  Wiring diagram (Type S)       
(Inlet wire from bottom, outlet wire on top)
Terminal Note
1 Inlet phase line
4 Inlet neutral line 
3 Outgoing phase line
6 Outgoing neutral line
 (Inlet from top, outlet from bottom)
20 and 21 Port of pulse output passive

Product configuration table