AC Current

DIN rail mounting transducers available in 55mm x 112mm or 100 x 112mm DIN  rail cases.

Used to convert various inputs into standard DC signals for driving panel meters and for use in control devices.

M100-AA1 1ph. self powered ave. sensing RMS calibrated
M100-AL1 1ph. aux. powered ave. sensing RMS calibrated
M100-AR1 1ph. aux powered true RMS sensing RMS cal
M100-AA3 3ph. self powered ave. sensing RMS calibrated
M100-AL3 3ph. aux powered ave. sensing RMS calibrated

The M100 series current transducers are designed to measure A.C. current in single and 3 phase systems. They convert the A.C signal to a D.C. output that is directly proportional to the input signal. The M100-AA1, AA3 are self powered (ie auxiliary required) average sensing RMS calibrated current transducers, mA and voltage outputs are available.

The M100-AL1, AL3 are average sensing RMS calibrated, live zero current transducers. Auxiliary is required to provide power;so that 4mA output signal is present when the input is zero. The M100-AR1 is true RMS sensing RMS calibrated allowing measurement of distorted waveforms of up to 9th harmonic with a crest factor of 5. The AR1 is typically used in current measurement where distorted waveform is common, such as thyristor drives. The above units are used to measure current in energy management systems, switchboards, generator and telemetry controls.

Isolation of 4kV is provided between the input and output signal, allowing the output to be fed to conventional analogue meters, digital meters, PLC and computer systems.

Rated value In: 1 or 5 Amp CT connected. 0.5 to 10 Amp
direct connected
Power consumption: <1VA (AA1, AA3) <0.2VA (AL1, AL3,
Working Range: 10-125% In (AA1,AA3) 0-125% In (AL1,
Rated Frequency 50 / 60 / 400Hz
Frequency Influence 0.005% / Hz
Overload Continuous 4 x In
Overload for 1 sec 50 x In
Rated Value mA 0-1 / 5 / 10 / 20mA (AA1, AA3)
Rated Value mA 0-1 / 5 / 20 & 4-20mA (AR1)
Rated Value mA 4-20mA (AL1 AL3)
Rated Value volts 0-5 / 10V (AA1 AA3)
Rated Value Volts 0-5 / 10 & 1-5V (AR1)
Rated Value Volts 1-5V (AL1, AL3)
Zero No adjustment
Zero 2% (AR1, AL1, AL3)
Span 10% (AA1, AR1, AL1, AA3, AL3)
A.C. Voltage 115 / 230 / 400V (25% / 45-65Hz/<2VA)

D.C. Voltage

24 / 48 / 110V (20% galvanically isolated/<3W)
Note: M100-AA1,AA3 are self powered.
M100-AA1 Approx 0.3kg 55mm case
M100-AL1,AR1 Approx 0.4kg 55mm case
M100-AA3 Approx 0.6kg 100mm case
M100-AL3 Approx 0.7kg 100mm case
Product Code Input In Output Aux Freq Options
M100-AL1 5A 4-20mA 230V 50Hz


1 Non Standard inputs/outputs as far as technically viable
2 A.C. Auxiliary in range of 57.7 to 450 volts
3 Calibration at nominal Hz 35...40Hz
4 Calibration at temperature other than 23ºC