ABB IEMMU02
ABB IEMMU02
ABB IEMMU02
ABB IEMMU02

ABB IEMMU02 | IEM Series Industrial Energy Measurement Module

  • Brand: ABB
  • Model: IEMMU02
  • Product Type: Industrial Energy Measurement Module
  • Series: IEM Series (Industrial Energy Measurement)
  • Core Function: Measures electrical parameters (voltage, current, power, energy) and analyzes power quality (harmonics, flicker) for integration with ABB DCS/PLC systems; enables energy monitoring and process efficiency optimization.
  • Key Specs: 0.5% measurement accuracy, supports 3-phase 4-wire systems, Modbus RTU/TCP communication, -25°C to +60°C operating temperature.
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Part number: ABB IEMMU02
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Description

IEMMU02: Product Overview
This device is an industrial energy measurement module within ABB’s IEM Series, designed for electrical parameter monitoring and power quality analysis in industrial automation systems. In a DCS/PLC architecture, it functions as a field measurement unit, positioned in electrical panels or metering cabinets to acquire data from voltage/current transformers (VTs/CTs) or direct-connected sensors. Its role is to convert raw electrical signals into standardized data (e.g., kWh, power factor, harmonic distortion) for controller integration, enabling energy accounting, load profiling, and power quality troubleshooting.
The core functionality involves simultaneous measurement of 3-phase voltage (up to 690V AC), current (up to 5A AC via CTs), active/reactive/apparent power, energy (kWh/kvarh), and power quality metrics (total harmonic distortion [THD], voltage flicker). It processes data via a 16-bit ADC, applies calibration coefficients for accuracy, and transmits results to ABB controllers (e.g., AC800M) or SCADA systems via Modbus RTU/TCP. The module also provides event logging (e.g., voltage sags, overcurrents) for post-incident analysis.
It belongs to the IEM Series, a product family optimized for industrial energy management. The platform’s benefits include modular design (compatible with ABB’s S800 I/O chassis), adherence to IEC 62053 (energy metering) and IEC 61000-4-30 (power quality), and integration with ABB’s Ability™ Energy Management software for centralized analytics. This ensures seamless scalability from single-machine monitoring to plant-wide energy optimization.

ABB IEMMU02

ABB IEMMU02

IEMMU02: Technical Specifications
  • Model Number: IEMMU02
  • Manufacturer: ABB
  • Product Type: Industrial Energy Measurement Module
  • Measurement Parameters: 3-phase voltage, 3-phase current, active/reactive/apparent power, energy (kWh/kvarh), power factor, frequency, THD (up to 31st harmonic), voltage flicker
  • Accuracy: 0.5% (active energy), 1.0% (reactive energy), 0.2% (voltage/current)
  • Input Voltage Range: 100-690V AC (phase-to-phase), 57-400V AC (phase-to-neutral)
  • Input Current Range: 0-5A AC (via external CTs, 1A/5A secondary)
  • Communication Protocols: Modbus RTU (RS-485), Modbus TCP (Ethernet), IEC 61850 (optional via gateway)
  • Power Supply: 24V DC (±10%, drawn from controller backplane or external supply)
  • Operating Temperature: -25°C to +60°C
  • Storage Temperature: -40°C to +85°C
  • Protection Rating: IP20 (panel-mount, finger-safe terminals)
  • Dimensions: 99mm x 25mm x 120mm (WxHxD, S800 I/O form factor)
  • Weight: 0.2kg

    ABB IEMMU02

    ABB IEMMU02

Core Features & Customer Value​
The module’s design prioritizes measurement precision, power quality insight, and system integration simplicity. The 0.5% active energy accuracy ensures reliable billing and energy reporting—critical for facilities with strict utility contracts or carbon accounting requirements. For example, in a chemical plant, this accuracy identifies 2-3% energy savings opportunities by pinpointing inefficient motor loads.
Multifunction power quality analysis (THD, flicker) helps diagnose equipment issues: elevated THD (>5%) in a textile mill may indicate failing VFDs, while voltage flicker correlates with arc furnace instability. This enables proactive maintenance, reducing motor/transformer failures. The 31st harmonic measurement meets IEEE 519 standards for industrial systems, ensuring compliance with power quality regulations.
Modbus RTU/TCP support streamlines integration with ABB AC800M controllers or third-party PLCs (e.g., Siemens S7-1200). Engineers configure data mapping via ABB’s Control Builder M software, with automatic generation of energy tags for historian databases. This eliminates manual data entry, cutting commissioning time by 20%.
Compact S800 I/O form factor allows mounting in dense control cabinets, while 24V DC power compatibility simplifies wiring (shared with other I/O modules). For maintenance teams, the IP20 rating and removable terminal blocks facilitate quick sensor/CT replacements without panel disassembly.
Typical Applications​
In a food processing plant, the module monitors 3-phase power to a refrigeration system. It logs kWh consumption and detects voltage sags during compressor startups, correlating them with product temperature excursions. Data from Modbus TCP feeds an ABB AC800M controller, which adjusts compressor staging to reduce energy use by 15%.
At a municipal water treatment facility, it measures energy use across pump stations and analyzes THD from variable frequency drives (VFDs). Harmonic data identifies a faulty VFD causing 8% THD, prompting replacement before it damages transformer windings. Event logs track pump runtime for predictive maintenance.
In a renewable energy microgrid, the module monitors solar inverter output and battery storage current. Power quality metrics (flicker, frequency) ensure stable并网 with the utility grid, while energy data optimizes battery charging/discharging cycles to maximize self-consumption.

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