EUCHNER STP-TWxxx (Twin) - Manual (Page 5)

Operating Instructions Safety Switch STP-TW... (Twin)
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
100047-05-02/12 (translation of the original operating instructions)
Protection Against Environmental Influences
A lasting and correct safety function requires that the
actuating head must be protected against the
penetration of foreign bodies such as swarf, sand,
blasting shot etc.
Electrical Connection
When choosing the insulation material and wire
for the connections, pay attention to the over-
temperature in the housing (depending on the
operating conditions)!
Only switching contacts marked with the
positively driven NC contact symbol
are to
be used for the safety circuit.
For switching elements with four positively dri-
ven NC contacts only the contacts 21-22 and
41-42 are actuated on activating and de-
activating the guard locking. In applications with
potentially hazardous states (e.g. overtravelling
movements), contact 21-22 and/or 41-42 must
always be integrated into the safety circuit.
For STP-TW with plug connector:
For use and applications as per the requirements of
, a class 2 power supply or a class 2 transformer
according to UL1310 or UL1585 must be used.
Connection cables for safety switches installed at
the place of use must be separated from all moving
and permanently installed cables and un-insulated
active elements of other parts of the system which
operate at a voltage of over 150 V. A constant
clearance of 50.8 mm must be maintained. This does
not apply if the moving cables are equipped with
suitable insulation materials which possess an
identical or higher dielectric strength compared to
the other relevant parts of the system.
The operating voltage for the interlocking solenoid
must match the value on the rating plate (e.g. U
S
=
AC/DC 24 V).
f Break out the required entry opening.
f Fit the cable gland with the appropriate degree of
protection.
f For pin assignment see Figure 3.
f Tighten the screws with a torque of 0.5 Nm.
f Check that the cable entry is sealed.
f Close the cover and screw in position.
Functional Check
Warning! Danger of fatal injury as a result of faults
in installation and functional check.
Before carrying out the functional check, make
sure that there are no persons in the danger
area. Observe the valid accident prevention
regulations.
After installation and any fault, the safety function must
be fully checked. Proceed as follows:
f Mechanical function test
The actuator must slide easily into the actuating head.
Close the safety guard several times to check the
function.
f Electrical function test
1. Switch on operating voltage.
2. Close all safety guards.
Guard locking by solenoid force: ¨ Activate
guard locking.
f The machine must not start automatically.
f It must not be possible to open the safety guard.
3. Enable operation in the control system.
f It must not be possible to deactivate the guard
locking as long as operation is enabled.
4. Disable operation in the control system and
deactivate guard locking.
f The safety guard must remain locked until there is
no longer any risk of injury.
f It must not be possible to start the machine as long
as the guard locking is deactivated.
Repeat steps 2 - 4 for each safety guard.
Inspection and Service
If damage or wear is found, the complete switch
and actuator assembly must be replaced.
Replacement of individual parts or assemblies
is not permitted!
No servicing is required, but regular inspection of
the following is necessary to ensure trouble-free long-
term operation:
f correct switching function
f secure mounting of components
f dirt and wear
f sealing of cable entry
f loose cable connections or plug connectors.
Note:The year of manufacture can be seen in the
bottom, right corner of the rating plate.
Exclusion of Liability under the Following
Conditions:
f if the unit is not used for its intended purpose
f non-compliance with safety regulations
f non-compliance with safety regulations
f 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 standards have been
applied.
EUCHNER GmbH + Co. KG
Kohlhammerstraße 16
70771 Leinfelden-Echterdingen, Germany
Directives applied:
f Machinery directive 2006/42/EC
Standards applied:
f EN 60947-5-1:2004 + Cor.:2005 + A1:2009
f 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.
Figure 3: Switching elements and switching functions
E1
E2
E1
E2
v
h
E1 E2
Door closed Door closed Door open
and locked and not locked
Type
STP-TW3-2131..
STP-TW4-2131..
STP-TW3-4141..
STP-TW4-4141..