Global site

ABB's website uses cookies. By staying here you are agreeing to our use of cookies. Learn more

Frequently Asked Questions (FAQ)

Do you want to know more about M4M Network Analyzers?


1. What is the difference between M4M 20 and M4M 30?

M4M 20 provides complete electrical parameters monitoring (current, voltage, energy, power…) and basic power quality features (THD…).

M4M 30 measures additional power quality KPIs (harmonics up to 40th, neutral current measurement...) and advanced data recording features.

Please find more information here.

2. Where is it more suitable to use M4M 20 or M4M 30?

M4M 20 is suitable for use in sub-distribution boards for submetering applications (energy monitoring, cost allocation…).

M4M 30 is more suitable for use in main distribution boards and power centers for power quality monitoring (demand power management, PF management…)


3. Can I directly install this product without the use of any Current Transformer?

No, M4M is not suitable for direct insertion for current measurement. All M4M, except the M4M Rogowski versions, work with either …/1A or …/5A CTs. M4M Rogowski versions only work with R4M Rogowski coils.


4. Do I need external Voltage Transformers to measure 690V L-L?

No, all M4M versions measure voltage up to 400V L-N, thus 690V L-L, without any need for VTs (voltage transformers). For higher voltage levels it is possible to use Voltage Transformers.


5. Which M4M versions work with Rogowski coils? Can I use any Rogowski coil together with M4M?

M4M versions working with Rogowski coils are M4M 20 Rogowski and M4M 30 Rogowski. These only work with ABB’s R4M coils, provided with pre-wired terminals directly fitting M4M inputs.


6. What is the accuracy of M4M together with Rogowski?

The measurement system made of “M4M Rogowski version + R4M coils” is tested and certified as Class 0,5 acc. to IEC 61557-12. Accuracy is referred to measurement range 100A – 12kA with proper installation (cable at the center of R4M coil).


7. Do I need to use different order codes if I have to install M4M with …/1A or …/5A CTs?

No, all M4M versions working with standard CTs (except M4M Rogowski versions) can be installed with either …/1A or …/5A CTs. CT secondary will have to be set as 1A or 5A during M4M’s configuration.


8. Is M4M integrated in any connectivity solution?

Yes, M4M is natively integrated into ABB scalable digital solutions for energy management, such as the sub-distribution management System pro M compact InSite and ABB Ability™ Energy and Asset Manager cloud-solution with automatic recognition and no need for external integration of the meter in the system. 

More information here.


9. What are the Communication protocols available?

Both M4M 20 and M4M 30 are available with different communication protocols: Modbus RTU, Modbus TCP/IP, Profibus DP-V0, BACnet/IP. Each product version has 1 embedded communication protocol.


10. What is the Modbus unit load (UL) for M4M?

Modbus UL for all M4M equipped with Modbus RTU communication protocol is 1/8. Up to 247 M4M can be installed in a RS485 network without the need for a repeater.


11. Do I have to choose a specific product version in order to have a Bluetooth-equipped M4M?

No. All M4M 20 and M4M 30 versions are equipped with Bluetooth for smart commissioning and visualization via EPiC mobile APP, available for both iOS and Android devices.


12. When the customer does not have any supervisory system or cloud-based platform, does the M4M have some memory inside?

M4M 20 has a memory storing the energy value data, configurations of the meter, various logs (notifications, audit, etc). M4M 30 also has a 32MB flash memory allowing to store historical measurements (load profiles, energy trends, etc)


13. Is it needed to have an external gasket to reach IP54?

No, all M4M are tested as IP54 on the front with no need for external gaskets or covers.


14. Can I check when and how the configuration of the meter was changed?

Yes, all M4M have an audit log that stores the configuration data of the meter and timestamp every time FW is updated and/or CT ratio, VT ratio or Type of network is modified


15. Is there any certificate available with the M4M?

Every package of M4M contains its calibration certificate related to the specific device. Moreover, Certificates of Compliance (CoC) released by external certification body are available on the Library, one each for M4M 20 range and M4M 30 range.


16. What is the cable length between R4M Rogowski coil and M4M?

The cable connecting the R4M Rogowski coil and the M4M Rogowski version is 3 meters long.

17. Can I use M4M inside Medium Voltage (MV) systems?

Yes, M4M can measure up to 500kV through Voltage Transformers (VT primary).

18. What are the maximum current that M4M can measure?

Maximum current that can be measured via CT is 50kA (CT primary). 

19. Is there a maximum value of accumulated energy in M4M? What happens to the energy value after such maximum value is reached?

Max value for energy accumulators (active, reactive, apparent) is 999.999.999 kWh/kVArh/kVAh. After exceeding it, the accumulated value will restart from 0.

20. What is M4M sampling time?

Measurement via M4M for TRMS values is done with 128 samples per line cycle at 50Hz. Refresh time for measurements is 25 line cycles, therefore at 50Hz it is 500ms, while at 60Hz it is 416ms.

21. Can I use M4M Ethernet version with multiple TCP clients?

Yes, M4M Ethernet versions work with up to 3 simultaneous TCP clients.

22. Can I update M4M firmware on any M4M?

No, FW update is possible only on M4M versions equipped with Modbus RTU and Modbus TCP/IP communication through Ekip Connect software. FW update does not work over Bluetooth.

Download the firmware update guideline here.

23. Is there a desktop software available to remotely configure M4M?

Yes, Ekip Connect desktop software allows the stand-alone visualization and configuration of an M4M through PC. Connection between M4M and PC should be Modbus RTU or Modbus TCP/IP.

Download the manual "M4M desktop software - Getting started with Ekip Connect".

24. Is there a way to download the flash memory of M4M 30 on my computer?

Yes, Ekip Connect desktop software allows the download of the Historicals features (Load Profile, Max/Min Demand, Energy Cumulative, Energy Trend) as CSV files directly on the computer.

Download the manual "M4M desktop software - Getting started with Ekip Connect"

25. Can I configure M4M through my smartphone or tablet?

Yes, thanks to EPiC Mobile app that allows quick visualization and first commissioning of M4M via Bluetooth. The app is available for Android and for iOS.

26. Can I replicate the configuration of one M4M on several others in my switchboard?

Yes, both via PC (Ekip Connect desktop software) and via smartphone or tablet (EPiC Mobile app) thanks to the "Import/Export" function that allows to save configuration time in case of similar configuration setup of different M4Ms with same product code.

27. What is the difference between "Basic" and "Advanced" min/max demand values in M4M 20 and M4M 30?

Basic feature in M4M 20 implies the visualization of max and min demand values for the instantaneous parameters without a flash memory, therefore max and min values since last power cycle. After a power off, there is a reset of max/min demand values. 

M4M 30 has Advanced feature thanks to the flash memory that allows saving max and min values in the "Max/Min Demand" Historicals functionality. After a power off, max/min demand values are stored in the M4M.

28. When I set date and time on M4M, will it be stored even in case of power outage?

Date and time will be stored only for M4M 30 thanks to the integrated Real Time Clock (RTC) for approximately 3 days without power. For M4M 20, it will be needed to configure again date and time after a power outage.

29. Is it mandatory to use a 4th CT on the Neutral line on M4M 30?

No, it is optional. M4M 30 can measure 4 current inputs for L1, L2, L3, N. In case Neutral line is not measured, Neutral current will be calculated inside the M4M.

30. Does M4M range include only front panel mounting network analyzers?

No, M4M 2X is a network analyzer range without display that can be mounted on DIN-rail.

More information available here.

31. Where is the M4M Modbus map, including registers addresses?

The updated M4M Modbus map can be found in the ABB library.