Schneider A9MEM3250 Energy Meter, Acti9 iEM3250, CT Modbus

The Schneider Electric A9MEM3250 is a CT-connected energy meter from the Acti 9 iEM3000 series, measuring active energy with Class 0.5S accuracy per IEC 62053-22 and IEC 61557-12. It supports 3P, 3P+N, and 1P+N network configurations and communicates via Modbus RTU over RS485, suitable for cost allocation and sub-metering applications.

Technical specifications:

• Commercial reference: A9MEM3250
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Acti 9 iEM3000
• Number of poles: 3P, 3P+N, 1P+N
• CT input rated current: 1 A or 5 A
• Rated voltage: 100...277 V / 173...480 V
• Network frequency: 50 Hz / 60 Hz
• Accuracy class: Class 0.5S active energy (IEC 62053-22, IEC 61557-12); Class C (EN 50470-3)
• Measured quantities: active energy, current, voltage, active power
• Sampling rate: 32 samples/cycle
• Communication: Modbus RTU at 9.6, 19.2, and 38.4 kbauds; RS485 screw terminal; 4000 V isolation
• Display: LCD
• Current circuit connection: screw terminals, 6 mm² cable
• Voltage circuit connection: screw terminals, 2.5 mm² cable
• Overvoltage category: III
• Mounting: DIN rail, clip-on
• IP rating: IP40 front panel / IP20 body (IEC 60529)
• Operating temperature: -25...70 °C
• Storage temperature: -40...85 °C
• Relative humidity: 5...95% at 50 °C
• Operating altitude: less than 3000 m
• Dimensions (W x H x D): 90 x 95 x 69 mm
• Weight: 348 g
• Pollution degree: 2
• Certifications: CE, UKCA, CULus (UL 61010-1), EAC, KZ/NMI (NMI M 6-1)

Features and benefits:

• Class 0.5S active energy accuracy for precise sub-metering and tenant cost allocation
• Modbus RTU RS485 communication with 4000 V isolation for safe BMS integration
• Connects to standard 1 A or 5 A current transformers, enabling retrofit installations
• LCD display with green, yellow, and flashing LED indicators for power status, accuracy verification, and Modbus activity
• Wide operating temperature range of -25 to 70 °C suits demanding environments

Applications:

• Tenant or department cost allocation sub-metering in commercial buildings
• Energy monitoring in industrial distribution and control panels
• Integration with building management systems via Modbus RTU
• Partial metering of specific loads using existing CT infrastructure

Compliant with IEC 61557-12:2021, IEC 62052-11:2020, IEC 62053-21, IEC 62053-22:2020, IEC 61326-1, and IEC 61010-1. Part of the Schneider Electric Acti 9 iEM3000 range.

Also known as: Schneider A9MEM3250, Schneider Electric A9MEM3250, iEM3250 CT energy meter, Acti9 Modbus energy meter.