FMD-01 is a dual channel device capable of accepting frequency modulated carrier
signals from both a front standard (FS) and exciter end (EXC) toothed wheel or
optical signal source.
The input and output signal specifications apply to both the FS and EXC
The FMD-01 is designed for permanent installation.
If you require low cost temporary monitoring of a single speed input,
contact EUMAC about the low cost portable model FMD-T.
Its performance specifications are virtually identical to the FMD-01.
A 1,000 Hz to 6,000 Hz approximately sinusoidal waveform or square wave from a shaft mounted toothed wheel on the turbine generator and stationary magnetic speed sensor. Alternate input is supported from EUMAC model OP-01 optoprobe and striped black & white target affixed to the turbine generator shaft. The allowable input signal range is 1.0 volt peak to peak (p-p) to 50 volts p-p.
first output signal is a voltage proportional to speed deviation from synchronous speed,
denoted as delta omega (Dw).
Typically set to 10.0 volts peak-to-peak output for a 1.0% speed change from
synchronous speed. Customer may specify other calibrations at time of
order. The second output signal is a voltage proportional to speed change
from 60Hz, denoted as omega (w).
is calibrated such that a ±
1.0 Hz change in speed produces a ±2.0 volt change in output up to a
maximum of ±5.0Hz (or ±10.0 volts). The
difference between delta omega and omega is that delta omega tracks average
speed and outputs a signal proportional to deviations from average speed.
Omega tracks speed changes from an absolute 60.00Hz basis. Both signals
outputs are capable of driving a 5k Ohm or greater load.
outputs are available in the form of contact closures that provide information on the
state of the FMD-01 and its input signals. Loss of input signal, FS
& EXC channels inoperative, loss of power supply are all alarmed quantities.
The alarm contacts are rated for 125 vdc or ac @ ½
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