Pneumatic Connection; Behavior In Case Of Failure Of The Electrical Auxiliary Power And/Or The Supply Pressure Pz - Siemens SIPART PS100 Operating Instructions Manual

See also
Overview of device components (Page 7)
4.3.2

Pneumatic connection

Supply pressure PZ
For safety reasons, the supply pressure PZ can 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 if there is leakage with "LEAKAGE TEST".
● If there is leakage, check the pneumatic connections for leaks.
4.3.3 Behavior in case of failure of the electrical auxiliary power and/or the supply
pressure PZ
Overview
Note the following 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 process valve has reached the safety position. If you only interrupt the
supply pressure PZ to the positioner, the safety position can in some cases only be attained
after a certain delay period.
SIPART PS100
Operating Instructions, 11/2019, A5E45863537-AC
WARNING
CAUTION
Connecting
4.3 Pneumatic connection
19