External Position Detection System; Principle Of Operation Of External Position Detection System; Mounting The External Position Detection System - Siemens SIPART PS2 Operating Instructions Manual

External position detection with NCS or external position detection system
B.3 External position detection system
B.3

External position detection system

B.3.1

Principle of operation of external position detection system

The external position detection system basically consists of a polycarbonate enclosure and a
potentiometer. The potentiometer has a resistance of 10 kΩ.
B.3.2

Mounting the external position detection system

Function
The SIPART PS2 6DR5... positioner facilitates the separate installation of a position detection
system, e.g. C73451-A430-D78. The stroke or rotary angle is recorded directly at the drive by
means of an external position detection system. It is therefore possible to install the controller
unit at some distance away, e.g. on a mounting pipe or similar. The positioner is connected to
the position detection system by means of an electrical cable. The positioner is connected to
the drive via one or two pneumatic lines.
Such a separate installation is useful whenever the ambient conditions at the valve exceed
the specified positioner values.
The external position detection system is secured to a console on rotary actuators and to a
mounting bracket on linear actuators. The mounting bracket can be a NAMUR type, or any
other mounting bracket.
Auxiliary power is supplied to the external position detection system via the EMC filter module
C73451-A430-D23, and EMC is ensured at the same time.
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SIPART PS2 with and without HART
Operating Instructions, 05/2017, A5E00074631-AC