EUCHNER GSxxxC1806 12 mm User Manual
Page 3
Operating Instructions Precision Multiple Limit Switches GS...C1806 12 mm
Correct use
Precision multiple limit switches
are used for posi-
tioning and controlling machines and in industrial
installations.
For general applications, snap-action switching
elements ES502E are used. For usage as safety
switches, only the switching element ES508E with
positively driven NC contacts is allowed.
The safety switches are positively driven auxiliary
power switches and comply with the requirements
as per IEC 60947-5-1 / EN 60947-5-1 annex K.
In combination with a separating safety guard, this
safety component prevents the safety guard from
being opened while a dangerous machine movement
is being performed. A stop command is triggered
if the safety guard is opened during the dangerous
machine function.
Before safety switches are used, a risk assessment
must be performed on the machine in accordance
with
EN ISO 13489-1, Safety of machinery. Safety re-
lated parts of control systems. General principles
for design
EN ISO 14121, Safety of machinery. Risk assess-
ment. Principles.
Correct use includes compliance with the relevant
requirements for installation and operation, in
particular
EN ISO 13489-1, Safety of machinery. Safety re-
lated parts of control systems. General principles
for design
EN 1088, Safety of machinery. Interlocking
devices associated with guards. Principles for
design and selection
EN 60 204-1, Safety of machinery. Electrical equip-
ment of machines. General requirements.
Incorrect use
Precision multiple limit switches with switching
element ES502E (snap-action switching contact
not positively driven) must not be used in safety
circuits.
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 ac-
cordance 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.
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.
Safety precautions
In safety circuits, only the switching element
ES508E with positively driven contact is allowed.
Precision multiple limit switches in safety circuits
provide a personal protection function. Incorrect
installation or tampering can lead to severe injuries
to personnel.
Precision multiple limit switches in safety
circuits must not be bypassed (bridging of
contacts), turned away, removed or otherwise
rendered ineffective.
On this topic pay attention in particular to the mea-
sures for reducing the possibility of bypassing from
EN 1088:1995+A2:2008, sec. 5.7.
Where precision multiple limit switches are used
in safety circuits, switches and trip dogs must
be fitted in such a way that they are adequately
secured against movement.
To meet these requirements:
The fixings must be reliable and must also
require the use of a tool to undo them.
The use of slots must be limited to the initial
adjustment.
Precautions must be taken to ensure there is no
movement after adjustment (e.g. using bolts or
dowel pins).
Mounting, electrical connection and setup only
by authorized personnel.
Function
Precision multiple limit switches possess several
switching elements arranged in a row.
The switching elements are actuated by means of
plungers. Different plungers and trip dogs are used
depending on the application (operating point ac-
curacy and approach speed) (see Figure 3).
In general applications the plunger is actuated by
trip dogs in accordance with DIN 69639 which are
mounted with an interference fit in trip rails in ac-
cordance with DIN 69638.
Switching elements / terminal assign-
ment
Figure 1: Switching elements and terminal assign-
ment
Installation
Precision multiple limit switches must not be
used as an end stop.
When used in safety circuits, positively mount
trip dogs on the machine/safety guard so that
they cannot be detached.
It is imperative that dimension
4
-0,5
(distance
from switch reference surface to trip dog, see
Figure 4) is maintained in safety circuits to
ensure safe contact opening.
Fit precision multiple limit switches so that
connection cables and plug connectors are not
damaged by moving parts of the machine.
Protection against environmental effects
Safety venting valves are used to equalize the pres-
sure to protect against the pumping action of the
plunger. They must not be sealed with paint.
Mask plunger, plunger guide, safety venting valves
and rating plate during painting work!
Electrical connection
Open switch cover
Conductor cross-section 0.34 ... 1.5 mm²
For terminal assignment see Figure 1
Fit EUCHNER cable gland M25x1.5 or similar quality
cable gland with captive O-ring
Seal cable carefully. Sealing ring must be matched
to the diameter of the cable
Tighten screws for connections to the switching
element to 0.6 Nm
Close switch cover and tighten cover screws to
1.5 Nm.
Functional check
When the safety guard is open, the safety switch
must be actuated in any safety guard position
(overrun protection).
In safety circuits, check the safety function.
The machine must stop when the safety switch
is actuated.
The machine must not start when the safety
switch is actuated.
Mechanical function test
Check the actuating elements for freedom of
movement.
Electrical function test
Actuate switch and check the switching function.
Inspection and service
In safety circuits, the entire multiple limit switch
must be replaced in case of damage or wear.
Repairs must be performed only by the manu-
facturer.
No servicing is required, but regular inspection
of the following is necessary to ensure trouble-free
long-term operation:
correct switching function
secure mounting of components
precise adjustment of trip dog in relation to multiple
limit switch
dirt and wear
sealing of cable entry
loose cable connections or plug connectors.
The multiple limit switches in safety circuits must
be replaced when the max. number of operating
cycles is reached.
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
installation and electrical connection not per-
formed by authorized personnel
failure to perform functional checks.
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 stan-
dards have been applied.
EUCHNER GmbH + Co. KG
Kohlhammerstraße 16
70771 Leinfelden-Echterdingen, Germany
Directives applied:
Machinery directive 2006/42/EC
Standards applied:
EN 60947-5-1:2004 + Cor.:2005 + A1:2009
EN 1088:1995+A2:2008
Leinfelden, July 2010
Dipl.-Ing. Michael Euchner
Director
Duc Binh Nguyen
Authorized representative empowered to draw up
documentation
The signed EC declaration of conformity is included
with the product.
ES502E
ES508E
22
14
21
13
22
21
Shown: switching elements not actuated