Description   
3.4 Mode of operation 
  SIPART PS2 with and without HART 
28  Operating Instructions, 10/2013, A5E00074631-11 
 
Block circuit diagram for signal-acting or dual-acting drives 
 
Basic electronics with microcontroller and input circuit 
Control pad with display and buttons 
Single-acting (6DR5.1.) or double-acting (6DR5.2.) pneumatic block 
Alarm module for three alarm outputs and one binary input 
SIA module (slot initiator alarm module)  
Spring-loaded pneumatic positioning drive (single-acting) 
Pneumatic actuator (double-acting) 
Figure 3-12  Block circuit diagram for the electropneumatic positioner, functional diagram  
 
 
Note 
Alarm module and SIA module 
Alarm module 
⑥ and SIA module ⑦ can only be alternatively used.