Technical data
Safety settings on failure of auxiliary electrical or pneumatic energy
Actuator type
Designation
Single-acting
SFA
Single-acting
SFB
Double-acting
SFI
S
YSTEM
Safety position after
failure of auxiliary energy
Electrical
Pneumatic
down
up
down / up
(depending on
connection of
control
conductors)
D
ESCRIPTION
down
up
undefined
8630 - 29