Electropneumatic positioner for series ST 61.. pneumatic actuators 
•      automatic initialization
•      two line LCD display
•      simple menu-assisted parameter setting
•      safety position if auxiliary energy fails
•      galvanic separation between input and check-back signal
•      Optional: 4-20mA check-back signal (2-wire) (Iy- module)
•      Optional: alarm moduleOptional: Profibus PA connection