schmersal EX-T 335 Operating Instructions Manual Download Page 3

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

Summary of Contents for EX-T 335

Page 1: ...tire machine or plant The product must be exclusively used in accordance with the versions listed below or for the applications authorised by the manufacturer Detailed information regarding the range of applications can be found in the chapter Product description 1 5 General safety instructions The user must observe the safety instructions in this operating instructions manual the country specific...

Page 2: ...n in ac cordance with the relevant standards and the required safety level The entire concept of the control system in which the safety component is integrated must be validated to the relevant standards The safety technical data and features according to the applicable test certificate or possible other approvals are mentioned in the technical data 2 4 Technical data Designation in accordance wit...

Page 3: ...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 ...

Page 4: ... the inside of the arm Positioning the lever H 10 10 10 10 The roller lever can be repositioned over 360 on the toothed shaft in 10 steps Unscrew the hexagonal screw approx 4 mm reposition the lever in the desired position and retighten the screw Length adjustable lever 7H 10H To adjust the length of the lever unscrew the fixing screw of the lever Firmly retighten the screw after the length adjust...

Page 5: ... checked and met The installation is executed according to the instructions The connection is executed correctly The cable is correctly executed and connected Check the free movement of the actuating element The safety component is not damaged Remove particles of dust and soiling Check cable entry and connections in de energised condition 5 2 Maintenance In case of correct installation in accordan...

Page 6: ...ervice GmbH Am Grauen Stein 51105 Köln ID n 0035 Certificate number 01 220 4316 06 Notified body DEKRA EXAM GmbH Dinnendahlstraße 9 44809 Bochum ID n 0158 EU prototype test certificate BVS 09 ATEX E 152 Person authorised for the compilation of the technical documentation Oliver Wacker Möddinghofe 30 42279 Wuppertal The currently valid declaration of conformity can be downloaded from the internet a...

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