Pneumatic Connection; Response To Failure Of Auxiliary Power - Siemens SIPART Series Operating Instructions Manual

See also
Overview of device components (Page 7)
4.4.2

Pneumatic connection

Pneumatic auxiliary power
Owing to safety reasons, the pneumatic auxiliary power supply must be fed after installation
only if the positioner is switched to the "NO INIT" mode when an electrical signal is available.
Note
Specifications regarding air quality
Observe the specifications regarding the air quality, see section "Technical specifications >
Pneumatic data (Page 38)".
Note
Leakage
Besides continuous air consumption, a leakage can cause the positioner to try to compensate
the position deviation. This will result in premature wear in the entire control device.
● Check with "LECKAGE TEST" [04] if there is leakage.
● If there is leakage, check the pneumatic connections for leaks.
4.4.3

Response to failure of auxiliary power

Overview
The following overview diagram shows the pneumatic connection versions for different actuator
types, regulating action and safety position after an auxiliary power supply failure.
Before working on the control valve
Note that, before working on the control valve, you must first move it to the safety position.
Make sure that the control valve has reached the safety position. If you only interrupt the
pneumatic auxiliary power supply to the positioner, the safety position may in some cases
only be attained after a certain delay period.
SIPART PS100
Operating Instructions, 10/2018, A5E45863537.-AA
WARNING
CAUTION
Connecting
4.4 Pneumatic connection
19