Frequency Transducers

Frequency Transducers


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.

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Selection Guide

M100-FA1Self powered true zero outputs
M100-FL1Auxiliary powered live zero outputs
M100-FX1Auxiliary powered true zero outputs

Typical Applications

The M100 series of frequency transducers are designed to measure frequency in single and 3 phase systems. The A.C. Input is converted to a D.C. output that is directly proportional to the change in input frequency within a specified span. The M100-FA1 is self powered (No auxiliary required). The working voltage range is 75% to 125% of the nominal voltage.

The M100-FL1 is auxiliary powered. The outputs are live zero, either 4mA or 1 volt. The auxiliary enables the working voltage range to be 15%-125% The M100-FX1 is essentially the same as the FA1 but an auxiliary is provided to enable the unit to have a working voltage range of 15%-125%. All types of the above frequency transducers are typically used to monitor and control frequency in such applications as 3 phase mains supplies, A.C. Generating sets and processing control etc.

Technical Specifications

Rated Value Un57.8 << 600V
Power Consumption< 1VA  (FL1, FX1) < 1.5VA (FA1)
Working Range75-125%  Un(FA1)15-125%Un (FL1, FX1)
Measuring Range45-55/45-65/55-65/360-440Hz
Overload Continuous1.5 x Un
Overload for 1 sec2 x Un (VA1 VA3)
Rated value mA0-1/5/10/20mA(FA1,FX1)
Rated value mA4-20mA (FL1)
Rated value volts0-5/10V(FA1,FX1)
Rated value volts1-5V(FL1)
ZeroNo adjustment
SpanNo adjustment
A.C. Voltage115/230/400V (± 25%/45-65Hz/<2VA)
D.C. Voltage24/48/110V( ±20% / galvanically isolated
/ < 3W) Note M100-FA1 is self powered
WEIGHT&CASE SIZEApprox 0.7kg. 100mm case

Ordering Information

Product CodeInput InOutputAuxFreqOptions
M100-VS1110V ±15%20mA50Hz


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

A.C. Current Connection Diagrams