2CSG251161R4051 ABB M4M 20 I/O Network Analyser

Why Choose the ABB M4M 20 I/O Network Analyser?

The ABB M4M 20 I/O is a three-phase panel-mounted network analyser designed for comprehensive electrical parameter monitoring and basic power-quality analysis in industrial and commercial electrical distribution systems. As part of the ABB M4M 20 series, it combines accurate electrical measurement with a graphic colour display, flexible I/O and communication capabilities.

This I/O version provides two programmable I/O, two digital outputs and two analogue outputs, offering flexible integration with alarms, control equipment and external monitoring systems. Integrated Modbus RTU via RS485 enables connection to automation and energy-management networks, while Bluetooth supports smart commissioning and local configuration.

Designed for transformer-connected current measurement, the M4M 20 I/O supports 1 A and 5 A current transformers and operates from a wide 48–240 V AC/DC auxiliary supply. Its compact 96 × 96 mm front-panel format, accurate energy measurement and broad range of electrical parameters make it a versatile monitoring solution for switchboards and distribution panels.

Key Advantages

• Comprehensive three-phase network monitoring in a compact panel-mounted format.
• Two programmable I/O provide flexible signalling and integration functions.
• Two digital outputs support external signalling and pulse functions.
• Two analogue outputs simplify integration with external monitoring and control equipment.
• Modbus RTU via RS485 supports industrial communication and system integration.
• Integrated Bluetooth enables smart commissioning and configuration.
• Active energy accuracy of ±0.5% supports dependable energy monitoring.
• Graphic colour display provides clear local visualisation of measured electrical parameters.

Key Features

• ABB M4M 20 network analyser series.
• Three-phase electrical network monitoring.
• Two programmable I/O.
• Two digital outputs.
• Two analogue outputs.
• Modbus RTU communication via RS485.
• Integrated Bluetooth connectivity.
• 48–240 V AC/DC auxiliary supply.
• Transformer-connected current measurement using 1 A or 5 A CTs.
• Graphic colour display for local measurement visualisation.
• Measurement of AC voltage and current.
• Measurement of active, reactive and apparent power.
• Frequency and power-factor measurement.
• True RMS measurement.
• Basic power-quality monitoring including THD.

Flexible Electrical Network Monitoring

The ABB M4M 20 I/O provides detailed visibility of an electrical distribution system by measuring key parameters including AC voltage, current, frequency, power factor, active power, reactive power and apparent power. True RMS measurement and basic power-quality functions such as THD monitoring help electrical professionals evaluate network performance and identify abnormal operating conditions.

Its expanded I/O configuration makes this model particularly suitable where the network analyser must exchange signals with external equipment. The combination of two programmable I/O, two digital outputs and two analogue outputs provides flexible interfacing, while Modbus RTU allows measurement data to be incorporated into supervisory, automation and energy-management systems.

Typical Applications

• Industrial electrical distribution systems.
• Commercial building energy monitoring.
• Main and sub-distribution switchboards.
• Basic power-quality monitoring.
• Energy-efficiency monitoring and analysis.
• Industrial machinery and production facilities.
• Building-management and energy-management systems.
• Applications requiring programmable I/O, digital outputs and analogue outputs.