Burkert Type 8793 - Manual (Page 33)

33
Description of System
11.8. Safety end positions after failure of the electrical
or pneumatic auxiliary power
The safety end position depends on the fluidic connection of the actuator to the working connections A1 or A2.
Actuator.system Designation
Safety.end.positions.after.failure.of.the
electrical.auxiliary.power
pneumatic..
auxiliary.power
up
down
single-acting
Control function
A
down
→
Connection according to “Figure 10”
down
up
→
Connection according to “Figure 11”
up
down
single-acting
control function
B
up
→
Connection according to “Figure 10”
up
down
→
Connection according to “Figure 11”
up
down
lower
chamber
upper
chamber
double-acting
Control function
I
Fluid connection see “Figure 12”
not defined up = lower chamber of the actuator to A2
down = upper chamber of the actuator to A2
Table 8: Safety end position
Fluid.connection:.Description for “Table 8”
Single-acting.actuators.
Control function A and B Double-acting.actuators.
Control function I
Connection:
working connection A1 to actuator
A2 sealing
Connection:
working connection A2 to actuator
A1 sealing
Connection:
Working connection A1 and A2
to actuator
Safety end position:
up = lower chamber to A2
down = upper chamber to A2
Figure 10: Connection A1 Figure 11: Connection A2 Figure 12: Connection with CFI
English
Types 8792, 8793