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 284)".
● If required, connect the pressure gauge block for supply air and actuating pressure.
● Connection via female thread G¼ or ¼" NPT:
● For double-acting actuators, connect actuating pressure Y1 or Y2 depending on the desired
● Safety position in case of electrical auxiliary power supply failure:
See also
Reaction to failure of auxiliary powers (Page 98)
Changing the operating mode (Page 107)
SIPART PS2 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00127926-AB
WARNING
– 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.
safety setting.
– Positioner with single-acting pneumatic system: Y1 depressurized
– Positioner with double-acting pneumatic system: Y1 pressurized (maximum actuating
pressure), Y2 depressurized
– Positioner with Fail in Place pneumatic system: Hold Y1 and Y2 (current actuating
pressure)
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.
Connect
5.3 Pneumatic connection
101