Festo ELGA-BS-KF, Operating Instructions Manual

Page: 28 / 112

ELGA-BS-KF
28 Festo – ELGA-BS-KF – 1508NH English
5.1.3 Mount accessories
To protect the end positions against uncontrolled overtravel:
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 (
è
Mounting instructions of the accessory).
Mounting options of the proximity sensor
in the slots With sensor bracket
1
2
1
3
1
Switch lug
2
Slot for proximity sensor
3
Sensor bracket
Fig. 11
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
(
9 è
Fig. 12) on the cover and connect compressed air/
vacuum.
Fig. 12
9