EASTRON SDM72BI Three-Phase Energy Meter with Day Tariff Function (32001)

The EASTRON SDM72BI stands out among three-phase energy meters by integrating a dual-tariff (ZRZ) function with a daily counter, enabling precise time-of-use energy accounting directly at the meter. This direct-connection meter handles up to 100 A, making it suitable for a wide range of residential and light commercial installations. Its backlit LCD and Modbus RTU interface provide both local readability and remote monitoring capability, a combination rarely found in this compact DIN-rail format.

Highlights

• Dual tariff (ZRZ) with daily function for time-of-use billing
• Direct connection up to 100 A, no external CTs required
• Modbus RTU (RS485) and dual pulse outputs for integration
• Backlit LCD for clear reading in low light
• MID B+D certified for billing applications

In daily use

The SDM72BI measures active and reactive energy, voltage, current, power, power factor, and frequency, giving a complete picture of electrical consumption. The dual tariff function allows separate accumulation of energy during high and low tariff periods, while the daily counter resets automatically, simplifying daily consumption tracking. The RS485 Modbus interface enables connection to energy management systems, and the two pulse outputs can be used for remote monitoring or integration with building automation. The meter is designed for DIN rail mounting and occupies only 4 modules, saving space in distribution boards.

Full specifications

• Meter type: Three-phase energy meter
• Connection type: Direct connection
• Maximum current: 100 A
• Nominal voltage: 3x230/400 V AC
• Frequency: 50/60 Hz
• Accuracy class: Class 1 (IEC 62053-21), Class B (EN 50470-3)
• Display: LCD with backlight
• Measured parameters: Active energy (kWh), reactive energy (kvarh), voltage (V), current (A), power (kW), power factor (PF), frequency (Hz)
• Tariff function: Dual tariff (ZRZ) with daily function
• Communication: Modbus RTU (RS485), 2x pulse output (S0)
• Mounting: DIN rail (4 modules)
• Pulse constant: 400 imp/kWh
• Operating temperature: -25°C to +55°C
• Protection class: IP51 (front), IP20 (terminals)
• Power consumption: < 2 W / 10 VA per phase

Final note

The SDM72BI is a robust and versatile meter for installations where tariff management and remote monitoring are required without compromising on accuracy or ease of installation.