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Operating Instructions Safety Switch NM..VZ
Correct use
Safety switches series NM are interlocking devices
without guard locking.
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.
The safety switches series NM comply with the
regulations of EN 60947-5-1, Annex K and comply
with the requirements of the employers' liability
insurance associations for machines, installations and
personnel protection.
Before safety switches are used, a risk assessment must
be performed on the machine in accordance with
EN ISO 13849-1, Safety of machinery. Safety related
parts of control systems. General principles for
design
EN ISO 14121, Safety of machinery. Risk
assessment. Principles.
IEC 62061, Safety of machinery. Functional safety
of safety-related electrical, electronic and
programmable electronic control systems.
Correct use includes compliance with the relevant
requirements for installation and operation, particularly
EN ISO 13849-1, Safety of machinery. Safety related
parts of control systems. General principles for
design
EN 1088, Safety of machinery. Interlocking devices
associated with guards. Principles for design and
selection
EN 60204-1, Electrical equipment of machines
Important:
The user is responsible for safe 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.
Depending on the application, the performance level
(PL) may be reduced on connection in series due to
reduced fault detection.
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
Safety switches fulfill a personal protection function.
Incorrect installation or tampering can lead to severe
injuries to personnel.
Safety components must not be bypassed
(bridging of contacts), turned away, removed or
otherwise rendered ineffective.
On this topic pay attention in particular to the
measures for reducing the possibility of bypassing
according to EN 1088:1995.A2:2008, sec. 5.7.
The switching operation may only be triggered
by actuators specially provided for this purpose
which are permanently connected to the
protective guard.
Mounting, electrical connection and setup only
by authorized personnel.
Function
The safety switch signals that the safety guard is
closed.
The switch does not perform guard locking!
Closing
The safety contacts are closed by inserting the
actuator.
Opening
The safety contacts are positively opened by
withdrawing the actuator.
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 info@euchner.de
Figure 1: Changing the actuating direction
Mounting
Safety switches and actuators must not be used
as an end stop.
Mount the safety switch only in assembled
condition!
Assemble the safety switch so that
access to the switch is difficult for operating
personnel when the safety guard is open.
maintenance and replacement are possible.
Insert the actuator in the actuating head.
Mount the safety switch positively.
For safety-related applications (fixed position),
mount switch with M5x30 screws.
Permanently connect the actuator to the safety
guard so that it cannot be detached, e.g. using
the enclosed non-removable screws, rivets or
welding.
Fit an additional stop for the movable part of the
safety guard.
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.
Cover the unused actuating slot with the slot cover.
Cover the actuating slot, the actuator and the rating
plate during painting work!
Only use solvent-free cleaning agents to clean the
switch!
Switching elements and switching functions
Door closed
Door
open
v
h
NM01
21
22
21
22
NM11
21
22
21
22
NM11...C2069
13
14
13
14
NM02
31
32
31
32
21
22
21
22
NM12
31
32
31
32
21
22
21
22
13
14
13
14
NM03
31
32
31
32
21
22
21
22
11
12
11
12
NM02..C2069
21
22
21
22
11
12
11
12
Fig. 2: Switching elements and switching functions
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)!
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. As an alternative, a low voltage
power supply according to UL508 table 32.1
can be used.
Fig. 3: Opening the safety switch
Break out the required entry opening.
Fit cable gland M16x1.5 with the appropriate degree
of protection.
Conductor cross-section 0.34 mm
For terminal assignment see Figure 2.
Tighten the screws with a torque of 0.5 Nm.
Check that the cable entry is sealed.
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:
Mechanical function test
The actuator must slide easily into the actuating head.
Close the safety guard several times to check the
function.
Electrical function test
1. Switch on operating voltage.
2. Close all safety guards.
The machine must not start automatically.
3. Enable operation in the control system.
4. Open the safety guard.
The machine must switch off and it must not be
possible to start it as long as the safety guard is
open.
Repeat steps 2 - 4 for each safety guard.
M = 0.6 Nm
2
... 1.5 mm².
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