Schneider Electric A9MEM3350 Acti9 IEM3350 Three-phase Rail Type Energy Meter

I. Product Overview
The A9MEM3350, part of the Schneider Electric Acti9 iEM3000 series, is a DIN rail-mounted, high-precision, three-phase electronic energy meter capable of direct current measurement up to 125 A. It features a built-in Modbus-RTU communication interface and is designed for end-of-line power monitoring in commercial buildings, industrial switchboards, and data centers.

II. Key Selling Points
• Accurate Metering: Active energy accuracy is Class 1.0, reactive energy accuracy is Class 2.0; bidirectional metering is supported, meeting the requirements of grid-connected sites such as photovoltaic power generation.
• Large, Intuitive Display: The 9-digit LCD displays real-time information on over 20 parameters, including total energy, time-of-use energy, instantaneous power, voltage, current, and power factor.
• Plug-and-Play Communication: RS-485 Modbus-RTU slave with a baud rate of up to 38,400 bps, supporting seamless integration with higher-level software such as EcoStruxure Power Monitoring Expert. • 125 A direct connection: No external CTs are required, saving cabinet space and cabling costs.
• Environmentally friendly: The entire unit has a carbon footprint of 66 kg CO₂e, and over 70% of the packaging is recyclable.

III. Technical Parameters
• System Type: Three-Phase Four-Wire (3P+N) or Three-Phase Three-Wire (3P)
• Rated Voltage: AC 220/380 V (Un ± 20%)
• Rated Current: 125 A direct-connect
• Frequency: 50/60 Hz ± 5%
• Display: 9-digit LCD with backlight, 1-second refresh cycle
• Communication: RS-485 Modbus-RTU (2-wire), supports odd/even/none parity
• Metering Data: Total/minute forward active power, reverse active power, four-quadrant reactive power, real-time power, voltage, current, PF, THD, etc.
• Pulse Output: 1 active pulse (optocoupler isolation, pulse constant 1,000 imp/kWh)
• Operating Temperature: -25°C…+55°C
• Mounting: 35 mm DIN rail, occupies 4 module (72 (mm) Width
• Certifications: CE, IEC 62053-21/22, UL, cUL, MID (optional)

IV. Typical Application Scenarios
1. Commercial Complexes: Individually metered at floor-level distribution boxes to enable tenant energy billing.
2. Industrial Plants: On-site monitoring of production lines, combined with PLC and SCADA systems for energy efficiency management.
3. Data Centers: Accurate metering at the cabinet level or at the UPS input and output to verify PUE indicators.
4. Grid-connected Photovoltaic Systems: Bidirectional metering, real-time recording of generated and connected power.

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