Mounting The Ncs - Siemens SIPART PS2 Operating Instructions Manual

B.2.2

Mounting the NCS

Function
The positioner facilitates the separate installation of the position detection system. The stroke
or rotary angle is measured directly at the actuator by means of a non contacting sensor. 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.
Such a separate installation is useful whenever the ambient conditions at the valve exceed
the specified positioner values.
The NCS consists of a molded sensor for fixed installation and a magnet. The magnet is
mounted to the spindle on linear actuators, or to the stub shaft on part-turn actuators. The
sensor housing is mounted onto the console on part-turn actuators and to the bracket on linear
actuators. The bracket can be a NAMUR type, or any other mounting bracket.
Auxiliary power is supplied to the NCS via the EMC filter module C73451-A430-D23 and EMC-
compatibility is ensured at the same time.
EMC filter module ordering options:
● Installed in the positioner; see Catalog FI 01
● For retrofitting in the positioner; Order No. C73451-A430-D23. For information on retrofitting
the EMC filter module, refer to the positioner operating instructions, chapter "Installation/
Mounting".
Figure B-3
SIPART PS2 with and without HART
Operating Instructions, 05/2017, A5E00074631-AC
External position detection with NCS or external position detection system
①
Pneumatic line
②
Pneumatic line for double-action actuators
③
Position detection system (10 kΩ potentiometer, or NCS)
④
Electrical cable
⑤
Retrofittable EMC filter module (in the positioner)
⑥
Positioner
Separate installation of the NCS and positioner
B.2 Non-Contacting Sensor
261