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

Connecting
5.4 Pneumatic connection

Behavior in case of failure of the electrical auxiliary power and/or the supply pressure PZ

(Page 34)
5.4.1

Structure of pneumatic connection

①
②
③
④
*) for double-acting actuators
Figure 5-2
5.4.2 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.
The difference between a failure of supply pressure PZ and a failure of electrical auxiliary
power:
• Failure of electrical auxiliary power means the failure of the signal source at the analog
input 4 to 20 mA.
• Failure of the supply pressure PZ
34
Output: Actuating pressure Y2 *)
Input: Supply pressure PZ
Output: Actuating pressure Y1
Exhaust air outlet with sound absorber, thread G¼
Pneumatic connection, example
CAUTION
Operating Instructions, 06/2023, A5E50188938-AF
SIPART PS100