2CMA100242R1000 ABB A42 113-100 Single-Phase CT Energy Meter M-Bus
ABB A42 113-100 single-phase CT-connected DIN-rail active energy meter with 1 A nominal current, 6 A maximum meter input, 57.7-288 V AC voltage range, Class B MID accuracy and integrated M-Bus communication.
The ABB A42 113-100 is an advanced single-phase transformer-connected DIN-rail energy meter designed for accurate active energy measurement in commercial, industrial and building energy-monitoring applications. Part of ABB's DIN Rail Mounted Meters range, it combines CT-connected measurement, a large backlit digital display and integrated M-Bus communication in a compact four-module format.
Designed for transformer-connected applications, the A42 113-100 has a 1 A nominal current, a maximum meter input current of 6 A and a wide 57.7–288 V AC phase-to-neutral voltage range. Its Class B MID / Class 1 active-energy accuracy makes it suitable for installations requiring dependable energy measurement through external current transformers.
Integrated M-Bus communication enables energy and instrumentation data to be accessed by compatible automatic meter-reading, building management and energy-monitoring systems. The meter also provides a configurable output for pulse or alarm functions, multiple instrumentation values, up to 25 possible alarms and event logging for comprehensive monitoring of electrical installations.
Key Advantages
Single-phase CT-connected energy measurement for higher-current electrical installations.
1 A nominal current with a maximum meter input current of 6 A.
Wide 57.7–288 V AC phase-to-neutral voltage range.
Class B MID / Class 1 active-energy accuracy.
Integrated M-Bus communication for remote meter reading and system integration.
Configurable output for energy pulses or alarm functions.
Multiple instrumentation values support detailed electrical monitoring.
Compact four-module DIN-rail construction for straightforward panel installation.
Key Features
ABB A42 series energy meter.
Single-phase transformer-connected measurement.
1 A nominal current.
6 A maximum meter input current.
57.7–288 V AC phase-to-neutral rated voltage range.
50–60 Hz rated frequency.
Active energy measurement.
Class B MID / Class 1 active-energy accuracy.
M-Bus communication interface.
One configurable output for pulse or alarm functions.
Configurable pulse rate from 1–999999 imp/kWh.
Multiple instrumentation values for electrical monitoring.
Up to 25 possible alarms and event logging.
Large backlit digital display.
IP20 degree of protection.
MID approved and verified and IEC approved.
Single-Phase CT Energy Monitoring with M-Bus
The ABB A42 113-100 uses external current transformers to provide accurate single-phase active energy measurement where direct-connected metering is unsuitable. Its transformer-connected architecture allows higher primary circuit currents to be monitored while the meter itself operates with a 1 A nominal current and accepts up to 6 A at its current input.
Integrated M-Bus communication enables energy and instrumentation data to be incorporated into compatible automatic meter-reading, building management and energy-monitoring systems. Combined with its configurable pulse or alarm output, instrumentation values, up to 25 alarm conditions and event logging, the A42 113-100 provides a flexible platform for both local and centralised energy monitoring.
Typical Applications
Commercial building energy monitoring.
Industrial single-phase energy metering.
Distribution board and switchboard monitoring.
CT-connected submetering applications.
Building management systems using M-Bus communication.
Centralised automatic meter-reading systems.
Plant and equipment energy monitoring.
Energy efficiency and consumption analysis.
Tenant, departmental and cost-centre energy monitoring.
Higher-current single-phase circuits requiring external current transformers.
Technical Specifications
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MID Approval
Yes
Device Type
Energy meter
Series
A42
Product group
DIN Rail Mounted Meters
ABB order code
2CMA100242R1000
EAN
7392696002424
Product type
Single-phase transformer-connected electricity meter
Phase configuration
Single phase
Connection type
CT / transformer connected
Nominal current
1 A
Maximum meter input current
6 A
Rated voltage (N-L)
57.7–288 V AC
Rated frequency
50–60 Hz
Energy measurement
Active energy
Active energy accuracy
Class B MID / Class 1
Tariff type
Single tariff
Communication
Wired M-Bus
Output
1 configurable pulse or alarm output
Pulse type
S0
Pulse rate
1–999999 imp/kWh
Alarm functionality
Up to 25 possible alarms
Event logging
Yes
Display
Backlit digital display
Protection rating
IP20
Power consumption
0.801 W
Operating temperature
-40 to +70 °C
Dimensions (W × H × D)
70 × 26.5 × 65 mm
Mounting type
DIN rail
Module width
4 modules
Standards
IEC 62052-11; IEC 62053-21; EN 50470-1; EN 50470-3
Approvals
IEC approved; MID approved and verified
Weight
approx. 0.20 kg
Frequently Asked Questions
What is the ABB A42 113-100 used for?
The ABB A42 113-100 is a single-phase transformer-connected energy meter designed to measure active electrical energy in commercial, industrial and building energy-monitoring applications using external current transformers.
Does the ABB A42 113-100 require current transformers?
Yes. The A42 113-100 is a CT-connected meter with a nominal current of 1 A and a maximum meter input current of 6 A. External current transformers allow higher primary circuit currents to be measured indirectly.
What communication interface does the A42 113-100 use?
The ABB A42 113-100 features integrated wired M-Bus communication, allowing energy and instrumentation data to be accessed by compatible automatic meter-reading, building management and energy-monitoring systems.
What voltage range does the ABB A42 113-100 support?
The A42 113-100 supports a wide phase-to-neutral rated voltage range of 57.7–288 V AC at 50–60 Hz, providing flexibility across a range of transformer-connected metering applications.
Is the ABB A42 113-100 MID approved?
Yes. The A42 113-100 is MID approved and verified with Class B active-energy accuracy. It is also IEC approved and provides Class 1 active-energy accuracy.
Trusted ABB Energy Metering
ABB A-series DIN-rail energy meters combine accurate transformer-connected measurement, clear local indication and digital communication capabilities, providing a practical platform for submetering, energy monitoring and integration with modern building and industrial energy-management systems.
MID Approval
Yes
Device Type
Energy meter
Series
A42
Product group
DIN Rail Mounted Meters
ABB order code
2CMA100242R1000
EAN
7392696002424
Product type
Single-phase transformer-connected electricity meter
Phase configuration
Single phase
Connection type
CT / transformer connected
Nominal current
1 A
Maximum meter input current
6 A
Rated voltage (N-L)
57.7–288 V AC
Rated frequency
50–60 Hz
Energy measurement
Active energy
Active energy accuracy
Class B MID / Class 1
Tariff type
Single tariff
Communication
Wired M-Bus
Output
1 configurable pulse or alarm output
Pulse type
S0
Pulse rate
1–999999 imp/kWh
Alarm functionality
Up to 25 possible alarms
Event logging
Yes
Display
Backlit digital display
Protection rating
IP20
Power consumption
0.801 W
Operating temperature
-40 to +70 °C
Dimensions (W × H × D)
70 × 26.5 × 65 mm
Mounting type
DIN rail
Module width
4 modules
Standards
IEC 62052-11; IEC 62053-21; EN 50470-1; EN 50470-3
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