3
EX-T 335
Operating instructions
Position switches
EN
3. Mounting
3.1 General mounting instructions
Fitting is only authorised in a de-energised condition
The enclosure can be fixed by means of 4 mounting holes. The
mounting dimensions are mentioned at the rear of the enclosure. The
fixing screws must be protected against unauthorised tampering. The
use of a protective ground wire is imperative. The enclosure must not
be used as an end stop. Any mounting position.
To ensure a proper functioning, the switch must be installed so that
the required switch travel is obtained. For safety functions, at least the
positive break travel indicated in the switch travel diagram (refer to
catalogue) must be obtained. All components have sufficient after-
travel to compensate for inaccuracies in the guidance of the actuating
system. The actuation of the switch beyond its end stop however must
be avoided.
Please observe the recommendations regarding maximum
impact energy, actuating speed and tightening torque in the
technical data.
Please observe the relevant requirements of the standards
ISO 12100, ISO 14119 and ISO 14120.
3.2 Dimensions
All measurements in mm.
76
40,5
30
7,3
5,3
60
66,5
30,5
6
M20
17
38
9,5
18
3.3 Settings
Changing the switching function (4VH, 4V7H, 4V10H)
Position switches with "4V" actuating head can be set so that they
are switched either only clockwise, only counterclockwise or in both
directions. The following steps are required:
1. Unscrew the retaining screws and remove the actuating head
2. Change the position of both inner plastic parts
3. Replace the actuating head and tighten the screws
4. Tightening torque for the head screws: 1.5 Nm
Changing the switching function
switching in both directions
switching only clockwise
switching only counterclockwise
