2
Operating instructions
Pull-wire emergency-stop switches
ZQ 700
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 resul-
ting from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary re-
pairs, 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:
ZQ 700-
➀
No.
Option
Description
➀
11
1 NO/1 NC contacts
02
2 NC contacts
Only if the information described in this operating instructions
manual are realised correctly, the safety function and therefo-
re the compliance with the Machinery 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 Destination and use
Pull-wire emergency stop switches are used on machinery and plants,
where triggering the emergency stop command must be enabled at
arbitrary points on the wire run. If the tensioned pull-wire is pulled or in
case of wire breakage, the switching function of the pull-wire emergen-
cy stop switch is activated. (refer to image 1)
F
1
0
0
Image 1: position indication and actuation
Design/operating principle
The pull-wire emergency stop switches of the ZQ 700 series are
brought into the operational condition by the proper pre-tensioning of a
maximum 10 m long wire. The inner switching element has 2 contacts;
in a tensioned condition, the NC contacts are closed and the NO con-
tacts are open.
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.
2.4 Technical data
Standards:
IEC/EN 60947-5-1, IEC/EN 60947-5-5,
EN ISO 13850, NBR 13930
Enclosure:
thermoplastic
Cover:
thermoplastic
Protection class:
IP67 to IEC/EN 60529
Contact material:
Silver
Switching system:
Change-over contact with double break,
1 to 2 NC contacts; snap action with
positive break NC contacts
Termination:
Screw terminals
Cable section:
2.5 mm² (incl. conductor ferrules)
Cable entry:
1 x M20
Rated impulse withstand voltage U
imp
:
6 kV
Rated insulation voltage U
i
:
500 V
Thermal test current I
the
:
10 A
Rated operating current/voltage I
e
/U
e
:
4 A/230 VAC,
4 A/24 VDC
Utilisation category:
AC-15, DC-13
Max. fuse rating:
6 A gG D-fuse (DIN EN 60269-1)
Required rated short-circuit current:
1000 A
Ambient temperature:
–25 °C … +70 °C
Relative humidity:
30 … 95%,
no condensation,
no icing
Wire length:
max.10 m depending in relation to the
range of ambient temperature (see image 3)
Mechanical life:
>1 million operations
Input terminal wire size AWG: 14-22
Max. Torque: 7 Lb In
Use solid or stranded copper conductors only.
2.5 Safety classification
Standards:
EN ISO 13849-1
B
10d
Opener (NC):
100.000
Service life:
20 years
MTTF
B
d
x
x
h
s/h
3600
d
10d
op
op
op
n
0,1 x n
op
t
cycle
(Specifications can vary depending on the application-specific parame-
ters h
op
, d
op
and t
cycle
as well as the load.)
3. Mounting
3.1 General mounting instructions
The installation may only be carried out by authorised personnel. The
pull-wire emergency stop switch is fitted by means of four screws (dis-
tance of the drill holes 30 mm or 60 mm), so that a release by hand can
be enabled 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 trac-
tion 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.
