Introduction
The DIN-Rail Energy Meter is designed for residential and industrial energy metering, offering a cost-effective solution for power and energy measurement. It is suitable for replacing mechanical meters and is applicable in commercial, industrial, and utility settings. The meter supports OEM and ODM services and is equipped with an LCD display for easy data reading.

Applications
The energy meter is used for tenant and cost sharing, metering distribution feeders, transformers, generators, capacitor banks, and motors. It is compatible with middle and low voltage systems and aids in the calculation and settlement of household electricity bills.

Specifications
- Voltage (U), Current (I) accuracy: 0.2%
- Power (P, Q, S) accuracy: 0.5%
- Power factor (H) accuracy: 0.1%
- Frequency (Hz) accuracy: 0.1%
- Consumed (Ep+) and Generated (Ep-) energy accuracy: 0.5%
- Consumed (Eq+) and Generated (Eq-) reactive energy accuracy: 2.0%

Reference Standards
- Basic electricity: IEC 61557-12:2007
- Active energy: IEC 62053-22:2003
- Reactive energy: IEC 62053-23:2003
- EMC test standards include discharge immunity, fast transient burst immunity, and surge immunity.

Main Features
- 35mm DIN-rail installation
- High precision measurement (0.5s)
- Large LCD screen with backlight
- RS485 with Modbus-RTU communication
- 80A current direct input, 0.04A start current
- Built-in energy pulse output and alarm output
- Compatible with 50Hz and 60Hz systems
- Tamper-proof design approved for revenue applications
- Wide range power supply (85-265VAC/DC)

Ordering Information
The DEM series offers various models with different features such as built-in or external CTs, harmonic distortion measurement, and communication options. Models include DEM-2M1D, DEM-3M1C, DEM-4M1D, DEM-7M3D, and DEM-4MC, each with specific parameters and functionalities.

Technical Characteristics
- Wiring methods include single-phase and three-phase options.
- Power supply ranges from self-powered to 85-265 VAC/DC.
- Display capacity varies by model, with maximum readings up to 99,999,999 KWh or MWh.
- Measurement accuracy for current and voltage ranges from 0.2% to 0.5%, with active and reactive energy classes specified.
- Environmental specifications include operating temperatures from -25°C to 55°C and IP protection ratings of IP40 for the front panel and IP20 for the casing.