Operating Instructions Enabling Switch ZSB
EUCHNER GmbH + Co. KG Kohlhammerstraße 16 D-70771 Leinfelden-Echterdingen Tel. +49/711/75 97-0 Fax +49/711/75 33 16 www.euchner.de [email protected]
Subject to technical modifications; no r
esponsibility is accepted for the accuracy of this information. © EUCHNER GmbH + Co. KG
092782-06-12/13 (translation of the original operating instructions)
Correct use
The EUCHNER enabling switch is a manually operated
command switch, which allows work to be carried
out in the danger area of automated production
systems in
manual operating
mode. This mode
must be secured with a lockable selector switch
according to EN 60204, part 1.
The enabling switch must be logically gated with the
machine control system in a manner that ensures
compliance with the requirements applicable to safety
circuits according to VDI 2854 and/or
EN ISO 10218-1. Under the conditions specified
therein, the enabling signal may cancel the protective
action of moving safety guards. Authorized operating
personnel may then enter the danger area:
for setting up
for observing work sequences
for maintenance.
Important:
The user is responsible for the integration of the
device in a safe overall system. For this purpose
the overall system must be validated, e.g. in
accordance with EN ISO 13849-2.
If the simplified method according to section 6.3
EN ISO 13849-1:2008 is used for validation, the
Performance Level (PL) may be reduced if several
devices are connected one after the other.
The enabling switch user must assess and
document remaining risks.
If a product data sheet is included with the product,
the information on the data sheet applies in case of
discrepancies with the operating instructions.
Incorrect use
The enabling signal must not be simulated by fixing
the switching contact in stage 2.
General
Depending on the version, buttons and a key-operated
rotary switch provide additional enabling switch
functionality.
Function
Stage 1: Off function, pushbutton not pressed
Stage 2: Enabling function, pushbutton pressed to
center position (actuating point)
Stage 3: Positively driven Off function, pushbutton
pushed to end stop
The enabling function is cancelled by releasing the
pushbutton or pressing it beyond the actuating point.
The enabling function does not reactivate when
returning from stage 3 to stage 1. For information on
the functions of the various versions, see Figure 1.
Safety precautions
Enabling switches fulfill a personal protection
function. Incorrect use or tampering can lead to
severe injuries to personnel.
All the safety and accident prevention regulations
for the specific application, e.g. guidelines of
the employers liability insurance associations,
safety requirements of the VDI (EN ISO 10218-1,
VDI 2854), EN 60204, EN 12100,
EN ISO 13849, EN 61062, DIN VDE 0106 part
100, etc., must be observed.
Electromechanical enabling switches/devices
are to be logically gated with the control system
in a manner that ensures compliance with the
requirements applicable to safety circuits
according to EN ISO 10218-1, DIN EN 60204-1,
EN ISO 13849-1, DIN EN ISO 11161 and
VDI 2854.
No commands for potentially hazardous
conditions are allowed to be initiated with
enabling switches alone.
The safety function of enabling switches must
not
be bypassed (bridging of contacts),
manipulated or otherwise rendered ineffective.
The enabling switch must be protected against
attempts by the operator to bypass its function.
Enabling switches may be used only by
authorized persons who can recognize hazards
in time and who are able to take appropriate
action immediately.
Every person present in the danger area must
carry his/her own enabling switch on his/her
person.
Mounting, electrical connection and setup only
by authorized personnel.
Mounting
A suitable holder must be used for enabling switches,
e.g. the EUCHNER holder order no. 052406.
Electrical connection
In the installation of a system, the cables and
wires used (except earth conductors) that can
be touched without opening or removing a cover,
or are laid on conductive parts external to the
device, must be either double insulated or have
reinforced insulation between core and surface,
or be surrounded by a metal sheath of adequate
current-carrying capacity in case of a short
between core and sheath.
For use and operation as per the
requirements, a power supply with the feature
“for use in class 2 circuits” must be used.
The max. cable length listed in the technical data
must not be exceeded.
Hazards due to crushing or cutting of the connection
cable must be prevented by suitable measures:
Protecting the cable by laying it appropriately, e.g.
in a protective sleeve.
Monitoring short circuits using an evaluation unit.
Using cable with individually screened cores. The-
se screens are to be connected to the machine or
plant earthing system. In this way cable short circuits
can be detected and the control system shut-down
immediately by the triggering of the short circuit
protection.
Setup
Check the enabling switch (enabling function at stage
2, and positively driven at stage 3) by performing a
functional check.
Service and inspection
No servicing is required, but to ensure trouble-free
long-term operation, regular inspection of the
electrical and mechanical function is required.
In the event of functional faults or damage, the
enabling switch must be replaced. Repairs are
only to be made by the manufacturer!
Note:
The year of manufacture can be seen in the
bottom, right corner of the rating plate.
Exclusion of liability under the following
circumstances
incorrect use
non-compliance with safety regulations
electrical connection not performed by authorized
personnel
function tests not performed
EC declaration of conformity
The manufacturer named below herewith declares that
the product fulfills the provisions of the directive(s)
listed below and that the related standards have been
applied.
EUCHNER GmbH + Co. KG
Kohlhammerstraße 16
70771 Leinfelden-Echterdingen, Germany
Directives and standards applied:
- Machinery directive 2006/42/EC
- EMC directive 2004/108/EC
- EN 60947-5-8:2006
Leinfelden, March 2013
Dipl.-Ing. Stefan Euchner
Director
Duc Binh Nguyen
Authorized representative empowered to draw up
documentation
The signed EC declaration of conformity is included
with the product.