B.3 External position detection
B.3.1 Mode of operation for external position detection
The Position Transmitter essentially consists of an enclosure and an internal position detection
system. The position is recorded by a potentiometer or an internal NCS module, section
"Principle of operation of NCS (Page 272)". The controller unit is separated from the positioner.
Such a separate installation is useful whenever the ambient conditions at the valve exceed the
specified positioner values.
The Position Transmitter is secured to a console with part-turn actuators and to a mounting
bracket with linear actuators, section "Mounting to linear actuator (Page 40)".
Auxiliary power is supplied to the Position Transmitter via the Analog Input Module (AIM) and
EMC compatibility is ensured at the same time.
â‘ Pneumatic line
â‘¡ Pneumatic line for double-action actuators
â‘¢ Position Transmitter
â‘£ Electrical cable
⑤ Analog Input Module (AIM) (fitted in the positioner or retrofittable)
â‘¥ Positioner
Figure B-10 Position Transmitter and positioner
B.3.2 Installation of external position detection system
Mounting of the Position Transmitter corresponds to the mounting of the positioner in a non-
flameproof enclosure. Proceed as described in Section "Installing and mounting (Page 37)".
The connection of the Analog Input Module (AIM) is described in the section "Analog Input
Module (AIM) 6DR4004-6F / -8F (Page 87)".
External position detection
B.3 External position detection
SIPART PS2 with 4 to 20 mA/HART
288 Operating Instructions, 11/2019, A5E00074631-AE
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