M2M Basic

The measure of efficiency

M2M Basic provides exactly what is needed for energy and power monitoring purposes, as it measures more than 40 electrical parameters on 3-phase and single phase networks. From commercial buildings to industrial applications, M2M Basic is a power meter for constant, real time power and energy monitoring in main and sub distribution switchboards. Improvement of power quality and preventative maintenance of equipment are made simple through this easy-to-use power meter. Thanks to bidirectional metering of energy on 4 quadrants, it is possible to visualize both energy production and consumption on a single device. This enhances the awareness towards correct energy consumption and increases energy efficiency in the common user behaviour.

Main benefits

Panel Builder: Simple installation and cabling of M2M Basic is guaranteed by the removable terminals, with cables that can be connected by using a single screwdriver. The device is held strongly to the panel thanks to easy-to-tighten fixing screws, which quickly fit the sides of the product.
End user: M2M Basic is a perfect solution for energy and power monitoring. Most accurate measurement is guaranteed by the compliance to IEC 61557-12. Setup of the device is easy and secure, as it is password-protected, which avoids that anyone can change the configuration of M2M Basic. Moreover M2M SW enables the remote setting of the device parameters.
System Integrator: Availability of Modbus RTU protocol for easy communication capabilities allows M2M Basic to cover many of current applications in buildings and industry. The whole solution can be integrated through as less time and effort as possible thanks to the communication protocol map. The device can thus be easily integrated into a supervisory software to remotely obtain measurements.

Main features

Measure in TRMS (True Root Mean Square) of voltage and current inputs
Calculation of power factor, cosφ and demand of active, reactive and apparent power and current
Measure of active, reactive, apparent powers and energies, in single line and total
Upgradable firmware
Remotely data reading and export through M2M SW
Four quadrant – bidirectional measurement of energy: monitoring of energy in two directions, both consumed and generated
Safety password allows only authorized personnel to configure the device

Learn more about

FAQ

What can I do if the instrument does not switch on?

Verify that the auxiliary power supply is within the limits. If the power supply is A.C., the voltage range must fall in the range between 85 V and 265 V and the frequency must fall in the range between 45 Hz and 65 Hz. If the power supply is D.C., the voltage range must fall in the range between 90 V and 300 V.
Verify the status of fuses or that the circuit breaker has not tripped.
Verify that the power supply is connected to the correct terminals.

What can I do if the instrument does not register any values?

Verify that the device is switched on.
Verify the status of fuses or that the circuit breaker has not tripped.
If it is installed a VT: verify that the secondary phase voltage falls in the range between 40 V and 300 V A.C. and that the secondary line voltage falls in the range between 69 V and 515 V A.C.; verify that the real phase voltage (primary phase voltage) falls in the range between 40 V and 800,000 V A.C.
If it is not installed a VT: verify that the phase voltage falls in the range between 40 V and 300 V A.C. and that the line voltage falls in the range between 69 V and 515 V A.C.
Verify that the current coming from secondary terminal of the CT falls in the range between 0.02 A and 6 A and that the real current flowing through the primary of the CT falls in the range between 1 A and 10,000 A (ensuring that the CT selected have a full scale of the primary compatible with real current in the primary).
Verify that the measuring terminal block is in the correct position.
Verify through a voltmeter that there is any voltages between the voltage input terminals: a. Between L1 and N for phase L1 b. Between L2 and N for phase L2 c. Between L3 and N for phase L3
Verify through an ammeter that there is any currents in the terminals of the meter: a. I1 (S1, S2) b. I2 (S1, S2) c. I3 (S1, S2)

What can I do if the instrument shows incoherent values?

Verify that the device is correctly switched on and working.
Please refer to the “5.2 Configuration mode” paragraph of User Manual and verify that all parameters (CT, VT and connection type) are correctly set up.
Verify that the sign of the active power, reactive power and power factor are coherent with the application
Please refer to the “4.3 Wiring diagrams” paragraph of User Manual and verify that the connection between current and voltage input terminals are coherent with the phase: a. Connect phase 1 or the VT connected to phase 1 to L1 voltage terminal and connect the current transformer installed in phase 1 to I1 current terminal (S1 and S2) b. Connect phase 2 or the VT connected to phase 2 to L2 voltage terminal and connect the current transformer installed in phase 2 to I2 current terminal (S1 and S2) c. Connect phase 3 or the VT connected to phase 3 to L3 voltage terminal and connect the current transformer installed in phase 3 to I3 current terminal (S1 and S2)
Verify that there is not a phase inversion on CT between S1 and S2.

What can I do if the instrument does not communicate?

Verify that the device is correctly switched on and working.
Verify that the following parameters are correctly setup in the meter and in the master device, which was used to do the request to the meter: a) Address in the network communication b) Baud rate c) Byte format
Verify that the RS485 terminals B, A and S are correctly connected.
Verify that the installed infrastructure complies with the requirements of the network.
Verify that Modbus RTU protocol is correctly set up in the master device and with the same parameter used in the M2M Basic communication configuration.

What can I do if the instrument shows wrong energy values?

Verify that the device is correctly switched on and working.
Please refer to the “5.2.9 Energy resolution” paragraph of User Manual and verify the energy resolution.

What can I do if the instrument does not allow to configure?

Please refer to the “5.2.3 Enabling the configuration” paragraph of User Manual and verify that the password was correctly entered.
What to do if I forgot the password?

Contact your ABB referent person or technical support. What is the serial port for Modbus communication and how can I recognize it?

The serial port is the Modbus communication interface, through which it is made possible to transfer data remotely to the master device. In M2M Basic Modbus it is installed a RS-485 Serial port. It is composed of 3 terminals (B-A-S terminals), located on the back side of the device, in the central section.
What is the difference between B-A-S terminals of the RS485 Serial port?

The B-A-S terminals compose the RS485 Serial port, through which it is made possible to transfer, with Modbus communication protocol, data remotely to a master device.

A represents the positive terminal connection
B represents the negative terminal connection
S represents the ground connection

What can I do if the A-B terminals are inverted?

If the A-B terminals are inverted the device does not communicate through Modbus interface.
Ensure to connect all positive cables in A terminal and all negatives cables in B terminal.

How can I set the CT ratio?

For setting the primary of the CT please refer to the “5.2.4 Primary of the CT” paragraph of User Manual.
For setting the secondary of the CT please refer to the 5.2.5 Secondary of the CT paragraph of User Manual.

How can I set the VT ratio?

For setting the primary of the VT please refer to the “5.2.6 Primary of the VT” paragraph of User Manual.
For setting the secondary of the VT please refer to the “5.2.7 Secondary of the VT” paragraph of User Manual.

What can I do if the CT or VT ratio is wrong?

If the CT or VT ratio is wrong the values displayed by the device are incorrect.
Ensure that the selection of the parameter reflect the CT and VT selected.

How can I set Modbus communication parameters?

For setting the communication baud rate please refer to the “5.2.10 Communication baud rate” paragraph of User Manual.
For setting the communication byte format please refer to the “5.2.11 Communication byte format” paragraph of User Manual.
For setting the communication address please refer to the “5.2.11 Communication Address” paragraph of User Manual.

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