3
TQ 900
Operating instructions
Pull-wire switches
EN
The pull-wire must be fixed to the ring and then be pre-tensioned until
the position indication is in the central position (refer to image 1).
As the thimbles are subject to deformation in case of wire pull, the wire
should be pulled several times after fitting. After that, the wire must be
re-tensioned (see image 4).
Image 4: deformation of the wire thimbles
In order to ensure an optimal operation safety and to save
time during fitting, we recommend using the wire rope and
the combined fixing and tensioning system from Schmersal.
Alternatively, wire thimbles and wire clamps can be used in
conjunction with a tensioner. In this case, the red PVC sheet
must be removed in the clamp area prior to installing the wire
rope.
3.2 Dimensions
All measurements in mm.
TQ 900
71,5
40
48
¤6,5
12
10
133,4
69,7
27
49,5
220,
3-
236,3
¤15
M20x1,5
Key
A
Position indication
4. Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by authorised
personnel in a de-energised condition.
1. Cover screws must be loosened
2. Dust shield cap remove
3. Cable glands M20 x 1.5 with an appropriate degree of protection
must be used
4. When wiring, please ensure that no cables are located within the
range of the lever system
5. The inside of the switch must be imperatively cleaned (e.g. removal
of cable residues), considering that foreign bodies can affect the
switching behaviour
6. Unused cable entries must be sealed by means of locking screws,
included in delivery (tightening torque 4 Nm)
7. The cover screws must be tightened uniformly (tightening torque 1 Nm)
Accessories cable gland:
Ordering code:
103006013
Authorised cable diameter:
6 - 12 mm
Tightening torque:
4.5 Nm
4.2 Contact variants
The symbols are shown for the switch in non-actuated condition.
TQ 900-11
TQ 900-02
14
13
22
21
12
11
22
21
TQ 900-22
TQ 900-04
TQ 900-13
13
14
22
21
14
13
22
21
S1
S2
11
12
22
21
12
11
22
21
S1
S2
11
12
22
21
14
13
22
21
S1
S2
Key
A
Positive break NC contact
5. Set-up and maintenance
5.1 Functional testing
The function of the component must be tested. The following conditions
must be previously checked and met:
1. Correct fixing of the pull-wire switch
2. Check the integrity of the cable entry and connections
3. Check the switch enclosure for damage
4. Check the functionality of the switch by actuating the wire
5. Check the cable tensioning by means of the position indicator
5.2 Maintenance
A regular visual inspection and functional test, including the following
steps, is recommended:
1. Check the wire tension through the wire position indication and check
the wire and the wire guides for damages and proper fitting
2. Check the functionality of the switch by actuating the wire
3. Check the cable entries and the wire connections
4. Remove particles of dust and soiling
Do not open the device when live.
Damaged or defective components must be replaced.
6. Disassembly and disposal
6.1 Disassembly
The switch must be disassembled in a de-energised condition only.
6.2 Disposal
The switch must be disposed of in an appropriate manner in accord-
ance with the national prescriptions and legislations.
