Technical Specifications:

• Model: MM-PMA1-400
• Manufacturer: AEG Power Solutions
• Measurement Channels: 3-phase 4-wire (3V + 3I) or 1-phase 2-wire configurable
• Voltage Input: 57.7V / 100V / 230V / 400V AC (auto-ranging)
• Current Input: 1A / 5A AC (via CT or direct)
• Voltage Accuracy: ±0.2% of reading
• Current Accuracy: ±0.2% of reading
• Active Power Accuracy: ±0.5% of reading
• Reactive Power Accuracy: ±0.5% of reading
• Power Factor Accuracy: ±0.01
• Frequency Range: 45–65 Hz
• Harmonic Analysis: Up to 63rd harmonic (IEC 61000-4-7 compliant)
• Energy Recording: kWh, kvarh, kVAh — cumulative and interval (1–60 min)
• Sampling Rate: 12.8 kHz per channel
• Data Interface: RS-485 (Modbus RTU), Ethernet (optional)
• Display: LED status indicators (no local display — remote readout only)
• Power Supply: 85–265V AC/DC, 5W
• Operating Temperature: -25°C to +70°C
• Dimensions (W x H x D): 90 mm x 110 mm x 65 mm (DIN rail mount)
• Weight: 0.35 kg
• Enclosure Rating: IP20 (DIN rail mounted in control cabinet)
• Standards Compliance: IEC 61557-12, IEC 61000-4-30 Class A

Material Composition:

• Enclosure: Polycarbonate (PC) flame-retardant housing (UL94 V-0)
• PCB: FR-4 TG150, conformal coated
• Terminals: Screw-clamp terminals, nickel-plated brass
• DIN Rail Clip: Steel with zinc plating

Structural Features:

• Mounting: 35 mm DIN rail (EN 60715)
• Terminal Blocks: 6 screw terminals — 3 for voltage (L1, L2, L3, N), 3 for current (CT inputs)
• Indicators: 4 LEDs — Power, Data, Alarm, Communication
• Communication Ports: RS-485 (RJ45 or screw terminal), optional Ethernet (RJ45)

Working Principle:
The module samples voltage and current waveforms at 12.8 kHz per channel using 24-bit ADCs. A dedicated DSP calculates RMS values, active/reactive/apparent power, power factor, frequency, and performs FFT-based harmonic analysis up to the 63rd harmonic (3,150 Hz at 50 Hz fundamental). Energy is accumulated by time-integrating power values. Data is transmitted via Modbus RTU over RS-485 or TCP/IP over Ethernet to a SCADA system, energy management software, or PLC. The module supports 4-quadrant energy measurement (import/export, active/reactive).

Advantages & Highlights:

• Class A Accuracy: Meets IEC 61000-4-30 Class A — suitable for revenue-grade metering.
• 63rd Harmonic Analysis: Full compliance with power quality standards.
• 3-Phase Capable: Single module handles full 3-phase 4-wire systems.
• DIN Rail Mount: Standard industrial cabinet installation.
• Modbus RTU + Ethernet: Dual communication for flexibility in SCADA integration.

Applicable Industries / Use Cases:

• Industrial energy management (factories, plants)
• Commercial building energy monitoring (BMS integration)
• Renewable energy systems (solar, wind — import/export metering)
• Data center power monitoring
• Utility substation metering
• Power quality auditing

Installation Requirements:

• DIN Rail: Standard 35 mm top-hat rail, mounted vertically.
• Wiring: Voltage inputs connected in parallel to the measured circuit; current inputs via CTs (clip-on or window-type) — never open-circuit a CT secondary.
• Communication: RS-485 daisy-chain — maximum 32 devices per bus; terminate ends with 120Ω resistor.
• Grounding: Chassis ground to protective earth (PE).
• Clearance: Minimum 30 mm above and below for ventilation.

Usage Precautions:

• Never open-circuit CT secondary — this generates dangerous high voltage.
• Verify voltage range before connection — applying 400V to a 230V-rated input destroys the module.
• Use shielded cable for current signals in high-EMI environments.
• Calibration: Verify annually against a reference standard (Class 0.2 or better).
• Do not exceed 85°C ambient temperature — derate accuracy above 50°C.