Feature: 1. Excellent long-term reliability, compact size, lightweight design, and easy installation. 2. Directly and accurately measures active power consumption in a single-phase AC grid with a rated frequency of 50 Hz. 3. Utilizes microelectronics technology with large-scale integrated circuits, advanced digital processing, and surface mount technology. 4. Single-phase electronic DIN rail energy meter is a new type of single-phase two-wire active energy meter. 5. Constructed from high-quality materials for enhanced durability. Specification: Condition: Item Type: DIN Rail Energy Meter Material: Pure Copper, Plastic Voltage: 230 V Current: 10 (40) A Frequency: 50 Hz Pulse Constant: 500 imp/kWh Size: As shown in the picture The DS1891 single-phase electronic DIN rail energy meter is a new generation single-phase two-wire active energy meter. It incorporates microelectronics technology, large-scale integrated circuits, advanced digital signal processing, and surface mount technology. Designed with independent intellectual property rights and optimized for minimal footprint. This meter complies with all technical requirements for Class 1 single-phase active energy meters as specified by international standard IEC62053-21. It enables accurate and direct measurement of active power consumption at 50 Hz in single-phase AC systems and displays total energy consumption via a stepper motor pulse register. Key Features: - 35 mm standard DIN rail mounting, compliant with DIN EN50022 - Single pole width (modular 17.5 mm), compliant with DIN43880 - Standard configuration includes 5 + 1 digit LCD backlit display (up to 99999.1 kWh) - Standard passive pulse output (polarized); optional non-polarized long-distance pulse output available - Compatible with various AMR systems, meeting IEC 62053-31 and DIN43864 standards - Dual LED indicators: green for power status, red for energy pulse signal - Unidirectional measurement of single-phase two-wire active energy; current direction insensitive, compliant with IEC62053-21 - Direct connection design with two wiring options: standard S-type, optional U-type - Extended terminal cover for improved safety during operation Package List: 1 x DIN Rail Energy Meter 1 x Instruction Manual