Pneumatic Connection - Siemens SIPART PS2 Operating Instructions Manual

Connection

5.3 Pneumatic connection

5.3.5 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 "P-manual mode" when an electrical signal is available,
refer to the as-delivered condition.
Note
Specifications regarding air quality
Observe the specifications regarding the air quality, see section "Technical specifications >
Pneumatic data (Page 232)".
● If required, connect the pressure gauge block for supply air and actuating pressure.
● Connection via female thread G¼ or ¼" NPT:
– Y1: actuating pressure 1 for single and double-acting actuators
– Y2: actuating pressure 2 for double-acting actuators
– Exhaust air outlet with a sound absorber. Remove the sound absorber if required.
● For double-acting actuators, connect actuating pressure Y1 or Y2 depending on the desired
safety setting.
● Safety position in case of electrical auxiliary power supply failure:
– Positioner with single-acting pneumatic system: Y1 depressurized
– Positioner with double-acting pneumatic system: Y1 pressurized (maximum actuating
– Positioner with Fail in Place pneumatic system: Hold Y1 and Y2 (current actuating
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.
● After installing the pneumatic connections, check the tightness of the entire control valve.
See also
Reaction to failure of auxiliary powers (Page 89)
Changing the operating mode (Page 99)
92
WARNING
pressure), Y2 depressurized
pressure)
SIPART PS2 with and without HART
Operating Instructions, 05/2017, A5E00074631-AC