Burkert 8631 Operating Instructions Manual page 40

S S
AFETY ETTINGS AND
Safety positions following failure of electrical or pneumatic
auxiliary power
Type of driving
up
down
up
down
up
down
Maintenance
The TOP Control on/off is maintenance-free if operated according to hte directions given in these
instructions.
38 - 8631
M
AINTENANCE
Designation
single-acting
WW A
single-acting
WW B
double-acting
WW I
Safety settings following failure or auxillary power
supply
electrical pneumatic
down down
up up
down / up not defined
(depending on connection
of control lines)