Siemens SIPART Series - 5.2.2 Pneumatic connection

Connection
5.2 Pneumatic
SIPART PS2 with and without HART
98 Operating Instructions, 10/2013, A5E00074631-11
5.2.2
Pneumatic connection
WARNING
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 "
Pneumatic data
(Page
236)".
● 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 at the bottom of the device. Remove the
sound absorber if required.
– P
Z
: Supply air 1.4 to 7 bar
● For double-acting actuators, connect actuating pressures Y1 or Y2 depending on the
desired safety position. Safety position in case of electrical auxiliary power supply failure:
– Y1: Single-acting, depressurized
– Y1: Double-acting, maximum actuating pressure
– Y2: double-acting, depressurized
Note
Leakage
Besides continuous air consumption, the positioner may try to compensate the
position deviation due to leakage. This will lead to premature wear in the entire control
unit.
•
After installing the pneumatic connections, check the tightness of the entire control
valve.
See also
Pneumatic connection versions (Page 96)
Changing the operating mode (Page 105)