Functional Principle, Technical Data; Functional Principle - MICRO-EPSILON induSENSOR MSC 7210 Serie Betriebsanleitung

Functional Principle, Technical Data

induSENSOR MSC 7210
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2. Functional Principle, Technical Data
2.1

Functional Principle

Inductive displacement sensors of the MSC 7210 series measure the displacement or distance to targets. The
mechanical displacement is transferred via a moving plunger, without contact, to the sensor. Exact concentric
guidance of the plunger in the sensor is not necessary. The controller generates a linear output signal from
the changed impedance ratio in the sensor caused by the plunger position.
An oscillator electronics excites the sensor with an alternating current of constant frequency and amplitu-
de. The frequency, amplitude and the phase compensation can be set with DIP switches for best operation
mode, see Chap. 5.
The demodulator transforms the sensor signal into a
stable direct output signal. With the setting possibi-
lities for zero point and gain the user can adapt the
equipment to the task to be performed, see Chap.
If the plunger is moved into the sensor, this results in
an increase of the output signal. Change the inputs
prim+ and prim- if the output signal should decrease
when the plunger is moved in, see Chap. 4.4.2.
The non-contact measuring principle ensures a long
service life.
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20 mA 10 V
5.
12 mA 6 V
4 mA 2 V
0 %
Measuring range
Fig. 1 Output signal of an inductive displacement
sensor
50 % 100 %
Plunger
Sensor
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