Siemens SIPART PS2 Handbuch Seite 45

Operating Instructions
Magnet
Sensor
Figure 2 Relative change in resistance depending on the angle of the magnet.
As the figure shows, a circular movement of the magnet causes a sinusoidal
change in the resistance. The mechanical stops of the fitting ensure that
only one part (quadrant) of the sinusoidal curve is used at any one time. The
principle-based non-linearity is corrected by a curve stored in the SIPART
PS2 positioner.
When the magnet is moved linearly past the sensor, there is also a change
in resistance which can be used to determine the position. The following
figure explains the principle.
H
N S
Figure 3 Change in resistance dependent on the position of the magnet.
NCS
A5E00097485-06
General information and function of the NCS
Sensor
+1
0
-1
Winkel
Angle
Position
43