Safety End Positions After Failure Of The Electrical Or Pneumatic Auxiliary Power - Burkert 8791 Manuel D'utilisation

Type 8791
Technicaldata
8.7 safety end positions after failure of the electrical
or pneumatic auxiliary power
The safety end position depends on the fluid connection of the actuator to the working connections A1 or A2.
actuator system
up
down
up
down
upper
chamber
lower
up
chamber
down
Table 4: Safety end positions
fluid connection: Description for "Table 4"
single-acting actuators
Control function A and B
Connection:
working connection A1 to actuator
A2 sealing
Figure 6: Connection A1
Designation
single-acting
→
Connection according to "Figure 6"
Control function
A
→
Connection according to "Figure 7"
→
Connection according to "Figure 6"
single-acting
control function
B
→
Connection according to "Figure 7"
→
Fluid connection see "Figure 8"
double-acting
up = lower chamber of the actuator to A2
Control function
I
down = upper chamber of the actuator to A2
Connection:
working connection A2 to actuator
A1 sealing
Figure 7: Connection A2
safety end positions after failure of the
electrical auxiliary power
down
up
up
down
Double-acting actuators
Connection:
Working connection A1 and A2
to actuator
Safety end position:
up = lower chamber to A2
down = upper chamber to A2
Figure 8:
english
pneumatic
auxiliary power
down
up
not defined
Control function I
Connection with CFI
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