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Top
Control
ON/OFF
english
4 SAFETY POSITIONS FOLLOWING A LOSS OF THE
ELECTRICAL AND/OR PNEUMATIC AUXILIARY
SUPPLY
Type of drive Description Safety position after loss
of the auxiliary supply
electrical pneumatic
single-working down down
WW A
single-working up up
WW B
double-working down / up not defined
WW I (depending on
the connection
of the control
lines)
Table 1: Safety position after loss of the electrical and/or pneumatic auxiliary supply
up
down
up
down
up
down
5 MAINTENANCE
The Top
Control
ON/OFF Type 8633 is maintenance-free for operation
corresponding to the instructions given in these operating instructions.
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