schmersal EX-ZQ 900 User manual

EX-ZQ 900
Operating instructions
Pull-wire emergency-stop switches
EN 1
1. About this document
1.1 Function
This operating instructions manual provides all the information you
need for the mounting, set-up and commissioning to ensure the safe
operation and disassembly of the safety switchgear. the operating
instructions must be available in a legible condition and a complete
version in the vicinity of the device.
1.2 Target group: authorised qualified personnel
All operations described in this operating instructions manual must
be carried out by trained specialist personnel, authorised by the plant
operator only.
Please make sure that you have read and understood these operating
instructions and that you know all applicable legislations regarding
occupational safety and accident prevention prior to installation and
putting the component into operation.
The machine builder must carefully select the harmonised standards
to be complied with as well as other technical specifications for the
selection, mounting and integration of the components.
1.3 Explanation of the symbols used
Information, hint, note:
This symbol is used for identifying useful additional information.
Caution: Failure to comply with this warning notice could
lead to failures or malfunctions.
Warning: Failure to comply with this warning notice could
lead to physical injury and/or damage to the machine.
1.4 Appropriate use
The products described in these operating instructions are developed to
execute safety-related functions as part of an entire plant or machine. It
is the responsibility of the manufacturer of a machine or plant to ensure
the correct functionality of the entire machine or plant.
The safety switchgear 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 installation standards as well
as all prevailing safety regulations and accident prevention rules.
Further technical information can be found in the Schmersal
catalogues or in the online catalogue on the Internet:
www.schmersal.net.
The information contained in this operating instructions manual is
provided without liability and is subject to technical modifications.
There are no residual risks, provided that the safety instructions as well
as the instructions regarding mounting, commissioning, operation and
maintenance are observed.
1.6 Warning about misuse
In case of improper use or manipulation of the safety switch-
gear, personal hazards or damages to machinery or plant
components cannot be excluded.
Content
1 About this document
1.1 Function ..............................................1
1.2 Target group: authorised qualied personnel..................1
1.3 Explanation of the symbols used ...........................1
1.4 Appropriate use ........................................1
1.5 General safety instructions ...............................1
1.6 Warning about misuse ...................................1
1.7 Exclusion of liability .....................................2
2 Product description
2.1 Ordering code .........................................2
2.2 Special versions........................................2
2.3 Purpose ..............................................2
2.4 Design/operating principle ................................2
2.5 Technical data .........................................2
2.6 Safety classication .....................................2
3 Mounting
3.1 General mounting instructions .............................3
3.2 Dimensions ...........................................3
4 Rear side Electrical connection
4.1 General information for electrical connection..................4
4.2 Contact variants........................................4
5 Set-up and maintenance
5.1 Functional testing.......................................4
5.2 Maintenance ..........................................4
6 Disassembly and disposal
6.1 Disassembly...........................................4
6.2 Disposal ..............................................4
7 EU Declaration of conformity
x.000 / 11.2017 / v.A. - 101212127-EN / D / 2017-11-13 / AE-Nr. 8370
EN Operating instructions. . . . . . . . . . . . .pages 1 to 6
Original

2
Operating instructions
Pull-wire emergency-stop switches EX-ZQ 900
EN
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual. The manufacturer shall accept no liability for damages
resulting from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary
repairs, conversions and modifications to the device are strictly
forbidden; the manufacturer shall accept no liability for damages
resulting from such invasive work, arbitrary repairs, conversions and/or
modifications to the device.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
EX-ZQ 900-
➀
-3D
No. Option Description
➀
11 1 NO / 1 NC
13 1 NO / 3 NC
22 2 NO / 2 NC
02 2 NC
04 4 NC
Only if the information described in this operating instruc-
tions manual are realised correctly, the safety function and
therefore the compliance with the Machinery Directive and
the Explosion Protection Directive is maintained.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Purpose
The emergency stop switch meets the requirements of EN ISO 13850,
IEC/EN 60947-5-1 and IEC/EN 60947-5-5. Pull-wire emergency stop
switches are used on machinery and plants in explosion-endangered
areas of Zone 22 equipment category 3D, where triggering the
emergency stop command must be enabled at arbitrary points on
the wire run. The installation and maintenance requirements to the
standard series EN 60079 must be met.
If the tensioned pull-wire is pulled or in case of wire breakage, the
switching function of the pull-wire emergency stop switch is activated.
(refer to image 1)
F
1
0
0
Image 1: position indication and actuation
2.4 Design/operating principle
The pull-wire emergency stop switches are brought into the operational
condition by the proper pre-tensioning of the wire. Up to two switching
elements located on the inside of the switch have either 2 or 4 contacts,
whereby the NC contacts are closed and the NO contacts are opened
in tensioned condition.
After actuation of the emergency stop function, a latching mechanism
maintains the stop command until the switch is released by pushing
the blue reset button. Prior to the reset of the emergency stop signal,
the reason why the switch has been actuated must be determined. The
switch can only be reset if the switch is correctly pre-tensioned (position
indication in central position, refer to image 1).
The entire concept of the control system, in which the safety
component is integrated, must be validated to the relevant
standards.
Conditions for safe operation
The specific ambient temperature range must be observed. The user
must provide for a protection against the permanent influence of UV
rays.
2.5 Technical data
Equipment category: L II 3D
Ex protection: Ex tc IIIC T100°C Dc
Standards: IEC/EN 60947-5-1, IEC/EN 60947-5-5,
EN ISO 13850, EN 60079-0, EN 60079-31
Enclosure: zinc die-cast, enamel finish
Cover: Steel
Protection class: IP67 to IEC/EN 60529
Contact material: Silver
Max. impact energy: 7 J
Contact type: 1 NC / 1 NO or
2 NC / 2 NO or
3 NC / 1 NO or
2 NC or 4 NC
Switching system: A IEC 60947-5-1 snap action,
NC contacts with positive break
Connection: screw terminals
Cable section: max. 2.5 mm²
(incl. conductor ferrules)
Cable entry: 3 × M20
Rated impulse withstand voltage Uimp:6 kV
Rated insulation voltage Ui:500 V
Thermal test current Ithe:4 A
Utilisation category: AC-15 / DC-13
Rated operating current/voltage Ie/Ue:4 A / 230 VAC;
1 A / 24 VDC
Max. fuse rating: 6 A gG D-fuse to IEC/EN 60269-1
Ambient temperature: −20 °C … +55 °C
Mechanical life: max. 1 million operations
Wire length: max. 75 m depending in relation to the
range of ambient temperature (see image 3)
Features: wire pull and breakage detection
Cable cross-section of the cable glands: min. Ø 7 mm; max. Ø 12 mm
Cable glands: L II 2GD
Tightening torque:
- Cable gland: 8 Nm
- Cover screws: min. 0.6 Nm, max. 0.9 Nm
2.6 Safety classification
Standards: EN ISO 13849-1
B10D NC contact: 100,000
Service life: 20 years
MT
TF
Bdxx
hs/h3600
D
10Dopop
op
n
0,1 x nop tcycle
(Specifications can vary depending on the application-specific
parameters hop, dop and tcycle as well as the load.)

3
EX-ZQ 900
Operating instructions
Pull-wire emergency-stop switches
EN
3. Mounting
3.1 General mounting instructions
Fitting is only authorised in a de-energised condition
The fitting may only be carried out by authorised personnel. The pull-
wire emergency stop switch is fitted by means of two screws (distance
of the dril holes 40 mm or 48 mm), so that a release by hand can be
realised without hazard. The component must be fitted so that the entire
length of the wire can be viewed from the position of the switch.
In accordance with IEC/EN 60947-5-5, the maximum perpendicular
traction force to be exercised on the wire in order to activate the
emergency pull-wire switch is 200 N, the maximum deflection is 400
mm. Sufficient space must be provided so that the required actuating
deflection can be reached. For tensioned span lengths up to 10 m,
intermediate wire supports are required every 3 to 5 m. To avoid
resonance vibrations in the wire on machines with high vibrations, it
is recommended to realise the individual support length differently.
Assembly: refer to image 2.
Please observe the recommendations regarding maximum
impact energy, actuating speed and tightening torque in the
technical data.
64 23 6561
0,1 m
3-5 m
A
46 932
max. 75 m
8238327
0,1 m
3-5 m
A
1 9
Image 2: mounting of the components
Key
1 Pull-wire with red PVC sheath Ø 5 mm (steel core: Ø 3 mm)
2 Eyebolt
3 Nut
4 Wire clamp
5 Tensioner
6 Wire thimble
7 Shackle
8 S900 wire tensioner
9 Tension spring RZ-2041
A Position indication
B Reset button
We recommend the use of the RZ-2041 tension spring to attenuate the
effects of temperature variations.
Due to the thermal expansion behaviour of the wire, the maximum
authorised wire length is determined by the ambient temperature range
(refer to image 3).
-10-20-30
5
15
25
35
45
55
65
75
0102030405060 70
lm[]
T°C[]
■
without
tension spring
■
with
tension spring
Image 3: temperature-dependent maximum wire length with or without
tension spring
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.
EX-ZQ 900
Ø19
48
40 27
71.3
71.5
57
72
Ø6.5
133.4
10
12
221-237
Ø32.7
M20x1,5
A
B
Legend:
A = Position indication
B = Reset-button

4
Operating instructions
Pull-wire emergency-stop switches EX-ZQ 900
EN
4. Rear side 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.
Cable glands (included in delivery) are only authorised for permanent
cables. The constructor must provide for the necessary strain relief.
To open the cover, the cover screws must be loosened. When wiring,
please ensure that no cables are located within the range of the lever
system and the pushbutton. After wiring, the inside of the switch must
be imperatively cleaned (e.g. removal of cable residues), considering
that foreign bodies can affect the switching behaviour. Screw back the
cover after that and uniformly tighten the cover screws.
The external potential equalisation terminal is to be
connected in accordance with EN 60079-14 section 6.3.
4.2 Contact variants
Contact variants are shown in a de-energised condition with
actuator inserted.
EX-ZQ 900-11-3D EX-ZQ 900-02-3D EX-ZQ 900-13-3D
14
13
22
21
12
11
22
21
11 12
2221
14
13
2221
S1 S2
EX-ZQ 900-22-3D EX-ZQ 900-04-3D
13 14
2221
14
13
2221
S1 S2 11 12
2221
12
11
2221
S1 S2
Key
A Positive break contact
5. Set-up and maintenance
5.1 Functional testing
The safety function of the safety components must be tested. The
following conditions must be previously checked and met:
1. Check the correct fitting of the pull-wire emergency stop switch
2. Check cable entry and connections in a de-energised condition
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
In case of correct installation in accordance with the above-described
instructions, the component requires little maintenance. For use in
extreme conditions, we recommend routine maintenance including the
following steps:
1. Check the correct fitting of the pull-wire emergency stop switch
2. Check the functionality of the switch by actuating the wire
3. Check cable entry and connections in a de-energised condition
4. Remove particles of dust and soiling
5. Check the wire tension through the wire position indication and check
the wire and the wire guides for damages and proper fitting
Do not open the device when live.
Damaged or defective components must be replaced. For
explosion protection reasons, the component must be exchanged
after max. 1 million operations.
6. Disassembly and disposal
6.1 Disassembly
The safety switchgear must be disassembled in a de-energised
condition only.
6.2 Disposal
The safety switchgear must be disposed of in an appropriate manner in
accordance with the national prescriptions and legislations.

5
EN
EX-ZQ 900-C-EN
EX-ZQ 900
Operating instructions
Pull-wire emergency-stop switches
7. EU Declaration of conformity
Place and date of issue: Wuppertal, March 29, 2017
Authorised signature
Philip Schmersal
Managing Director
EU Declaration of conformity
Original K.A. Schmersal GmbH & Co. KG
Möddinghofe 30
42279 Wuppertal
Germany
Internet: www.schmersal.com
We hereby certify that the hereafter described components both in their basic design and construction conform
to the applicable European Directives.
Name of the component: EX-ZQ 900
L II 3D Ex tc IIIC T100°C Dc
Type: See ordering code
Description of the component: Pull-wire emergency stop switch for safety applications
Relevant Directives: Machinery Directive
Explosion Protection Directive (ATEX)
RoHS-Directive
2006/42/EC
2014/34/EU
2011/65/EU
Applied standards: DIN EN 60947-5-1:2010,
DIN EN 60947-5-5:2015,
DIN EN ISO 13850:2016,
EN 60079-0:2012,
EN 60079-31:2014
Notied body, which approved
the full quality assurance system,
referred to in Appendix IV, 2014/34/EU:
TÜV Rheinland Industrie Service GmbH
Am Grauen Stein
51105 Köln
ID n°: 0035
Person authorised for the compilation
of the technical documentation:
Oliver Wacker
Möddinghofe 30
42279 Wuppertal
Die aktuell gültige Konformitätserklärung steht im Internet
unter www.schmersal.net zum Download zur Verfügung.

K. A. Schmersal GmbH & Co. KG
Möddinghofe 30, D - 42279 Wuppertal
Postfach 24 02 63, D - 42232 Wuppertal
Telefon +49 - (0)2 02 - 64 74 - 0
Telefax: +49 - (0)2 02 - 64 74 - 1 00
E-mail: [email protected]
Internet: http://www.schmersal.com