Mode Of Operation - Siemens 6DR4004-6NN Series Operating Instructions Manual

General information and function of the NCS
Figure 1 Separate installation of NCS and controller unit
1.2

Mode of operation

The NCS contains a magnetic field sensor amongst other things. This
sensor has the property that it changes its electrical resistance when
approached by a permanent magnet. Due to the measuring method used, it
has a large signal-to-noise ratio in relation to external magnetic fields.
The following figure illustrates the functional principle with a rotating magnet.
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1 Pneumatic connection
2 Pneumatic connection in double-action actuators
3 Positioning distance sensing system (potentiometer 10 kΩ or NCS)
4 Electrical connecting cable
5 Retrofittable EMC filter module (in the device)
6 SIPART PS2
Operating Instructions
NCS
A5E00097485-06