2CMA170500R1000 ABB A41 112-100 Single-Phase Direct-Connected 80 A Energy Meter with Modbus RS-485
ABB A41 112-100 is a single-phase direct-connected 80 A DIN-rail active energy meter with Class B accuracy, a 57.7–288 V AC rated voltage range and RS-485 communication supporting Modbus RTU and EQ Bus.
The ABB A41 112-100 is a compact and accurate single-phase direct-connected electricity meter designed for active energy measurement in industrial, commercial and building-services installations. As part of the ABB A41 EQ meter series, it combines direct measurement up to 80 A with a clear backlit digital display and integrated RS-485 communication.
Designed for direct connection to single-phase circuits, the A41 112-100 measures active electrical energy with Class B (Class 1) accuracy. Its Steel functionality level also provides useful electrical instrumentation values, while configurable alarm functionality and event logging support detailed monitoring of the connected electrical system.
The meter has a rated voltage range of 57.7–288 V AC and operates at 50/60 Hz. Integrated RS-485 communication using Modbus RTU or EQ Bus enables measured information to be collected remotely by compatible energy-management and building-management systems, while a configurable output can be used for energy pulses or alarm signalling.
Key Advantages
Compact single-phase direct-connected energy meter for professional installations.
Direct measurement up to 80 A without requiring an external current transformer.
Class B (Class 1) active energy accuracy for dependable consumption monitoring.
Integrated RS-485 communication supports remote data collection.
Supports Modbus RTU and ABB EQ Bus communication.
Instrumentation values provide additional visibility of electrical operating conditions.
Configurable output can be used for energy pulses or alarm signalling.
Up to 25 configurable alarm conditions support automated electrical monitoring.
IEC approved and MID approved and verified for professional metering applications.
Key Features
ABB A41 EQ meter series.
Single-phase direct-connected electricity meter.
5 A rated current and 80 A maximum direct current.
57.7–288 V AC rated voltage range.
50/60 Hz rated frequency.
Class B (Class 1) active energy accuracy.
Active electrical energy measurement.
Instrumentation values including active power, voltage, current and power factor.
RS-485 serial communication.
Modbus RTU and EQ Bus protocols.
Infrared communication interface.
One configurable digital output for energy pulses or alarm functions.
Up to 25 configurable alarm conditions.
Event logging functionality.
Large backlit pixel-oriented digital display.
Single-tariff energy measurement.
Compact four-module DIN-rail construction.
Reliable Single-Phase Energy Monitoring
Direct-connected energy meters such as the ABB A41 112-100 allow electricity consumption to be measured without external current transformers on circuits within the meter's direct-current rating. Its 80 A maximum current capability makes it suitable for a broad range of single-phase loads, while Class B active-energy accuracy supports reliable consumption and sub-metering applications.
RS-485 communication allows the A41 112-100 to become part of a wider digital energy-monitoring system. Modbus RTU and EQ Bus connectivity can be used to retrieve meter information remotely, while instrumentation values, configurable alarms, event logging and the pulse/alarm output provide additional tools for monitoring electrical performance and energy consumption.
Typical Applications
Commercial building energy monitoring.
Single-phase electrical sub-metering.
Industrial control and distribution panels.
Building management systems using Modbus RTU.
RS-485 energy-monitoring networks.
Tenant and departmental electricity monitoring.
Lighting and building-services circuits.
Retail, office and public-building installations.
Energy efficiency and electrical consumption analysis.
DIN-rail distribution boards requiring direct energy measurement.
Technical Specifications
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MID Approval
Yes
Measurement Connection Type
Via CT (/5 A)
Current Input Rating (A)
5 A
Device Type
Energy meter
Series
A41 EQ Meters
ABB order code
2CMA170500R1000
Product type
Single-phase electricity / energy meter
Functionality level
Steel
Connection type
Direct connected
Number of phases
1
Rated current
5 A
Maximum current
80 A
Rated voltage
57.7–288 V AC
Voltage range
47–331 V AC
Frequency
50/60 Hz
Measured energy
Active energy
Active energy accuracy
Class B (Class 1)
Communication interface
RS-485
Communication protocols
Modbus RTU / EQ Bus
Additional interface
Infrared
Output
1 configurable digital pulse / alarm output
Alarm capability
Up to 25 configurable alarms
Tariff rating
Single tariff
Display
Backlit pixel-oriented digital display
Protection rating
IP20
Mounting type
DIN rail
Module width
4 DIN modules
Product dimensions (W × H × D)
70 × 97 × 65 mm
Product net weight
approx. 0.246 kg
Operating temperature
−40 to +70 °C
Standards
IEC 62052-11, IEC 62053-21, EN 50470-1, EN 50470-3
Approvals
IEC approved, MID approved and verified
Frequently Asked Questions
What is the ABB A41 112-100 used for?
The ABB A41 112-100 is used for single-phase active energy measurement in commercial, industrial and building-services installations, with direct-connected measurement of circuits up to 80 A.
What is the maximum current of the ABB A41 112-100?
The A41 112-100 supports direct-connected measurement up to 80 A, allowing suitable single-phase circuits to be metered without external current transformers.
What is the accuracy of the ABB A41 112-100?
The meter measures active electrical energy to Class B (Class 1) accuracy and is IEC approved as well as MID approved and verified.
What communication does the ABB A41 112-100 support?
The A41 112-100 includes an RS-485 interface supporting Modbus RTU and ABB EQ Bus, enabling remote meter reading and integration with compatible energy-management systems.
What electrical values can the A41 112-100 monitor?
In addition to active energy, the meter provides instrumentation values including active power, voltage, current and power factor, supporting detailed monitoring of the connected single-phase circuit.
Trusted Energy Measurement from ABB
ABB A41 energy meters combine accurate direct-connected single-phase measurement with instrumentation, alarm functionality and digital communications, providing a practical platform for professional energy monitoring and sub-metering systems.
MID Approval
Yes
Measurement Connection Type
Via CT (/5 A)
Current Input Rating (A)
5 A
Device Type
Energy meter
Series
A41 EQ Meters
ABB order code
2CMA170500R1000
Product type
Single-phase electricity / energy meter
Functionality level
Steel
Connection type
Direct connected
Number of phases
1
Rated current
5 A
Maximum current
80 A
Rated voltage
57.7–288 V AC
Voltage range
47–331 V AC
Frequency
50/60 Hz
Measured energy
Active energy
Active energy accuracy
Class B (Class 1)
Communication interface
RS-485
Communication protocols
Modbus RTU / EQ Bus
Additional interface
Infrared
Output
1 configurable digital pulse / alarm output
Alarm capability
Up to 25 configurable alarms
Tariff rating
Single tariff
Display
Backlit pixel-oriented digital display
Protection rating
IP20
Mounting type
DIN rail
Module width
4 DIN modules
Product dimensions (W × H × D)
70 × 97 × 65 mm
Product net weight
approx. 0.246 kg
Operating temperature
−40 to +70 °C
Standards
IEC 62052-11, IEC 62053-21, EN 50470-1, EN 50470-3
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