Siemens 6DR55 Series Manual page 44

Electropneumatic positioner for linear and part--turn actuators
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Design and method of operation
Figure 18
Cable connection
.
42
Setting the two limit values:
1.
Drive the actuator to the first desired mechanical position.
2.
Adjust the top actuating disc (7.2) by hand until the output signal
on terminals 41 and 42 changes.
3.
Drive the actuator to the second desired mechanical position.
4.
Adjust the bottom actuating disc (7.3) by hand until the output si-
gnal on terminals 51 and 52 changes.
NOTE
To avoid the actuating discs (7.2/7.3) being accidentally adjusted du-
ring operation, they are relatively sluggish. The following remedy might
be of help if you are having trouble with the adjustment: open and
close the actuator several times while holding the actuating discs. This
temporarily reduces the friction. This allows an easier and finer adjust-
ment.
SIPART PS2 PA Manual
A5E00127926--05

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