Festo ELFA-RF, Operating Instructions Manual

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ELFA-RF
20 Festo – ELFA-RF – 1509b English
5.1.3 Mounting the accessories
To protect the end positions against uncontrolled excess travel:
Check the necessity of proximity sensors (hardware limit switches).
If proximity sensors are used as limit switches:
Preferably use proximity sensors with normally-closed function.
This protects against excess travel beyond the end position, if the proximity sensor cable is broken.
If proximity switches are used as reference switches:
Use proximity sensors that correspond to the input of the controller being used.
Use proximity sensors with switch lug
aA
(
è
Assembly instructions for the accessory).
Mounting
In the slots
9
(
è
Fig. 1) With sensor bracket
aB
9
aA
aA
aB
Tab. 3
Avoid external influences from magnetic or ferritic parts in the vicinity of the proximity sensors (min­
imum distance of 10 mm from the slot nuts).
Avoid contamination:
– Use slot covers in all unused slots (
è
www.festo.com/
catalogue).
– Connect sealing air. To do this, remove the threaded pin
(
aC è
Fig. 7) on the cover and connect compressed air/va­
cuum. For additional protection, use both sealing air connec­
tions.
Fig. 7
aC