Electrical Connection - EUCHNER NP Serie Mode D'emploi

Operating Instructions
Safety Switches NP...
Correct use
Safety switches series NP are interlocking devices
without guard locking (separate actuator). The ac-
tuator has a low coding level. In combination with
a movable safety guard and the machine control,
this safety component prevents dangerous machine
functions from occurring while the safety guard is
open. A stop command is triggered if the safety
guard is opened during the dangerous machine
function.
This means:
Starting commands that cause a dangerous ma-
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chine function must become active only when the
safety guard is closed.
Opening the safety guard triggers a stop com-
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mand.
Closing a safety guard must not cause automatic
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starting of a dangerous machine function. A
separate start command must be issued. For
exceptions, refer to EN ISO 12100 or relevant
C-standards.
Before the device is used, a risk assessment must
be performed on the machine, e.g. in accordance
with the following standards:
EN ISO 13849-1, Safety of machinery – Safety-re-
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lated parts of control systems – Part 1: General
principles for design
EN ISO 12100, Safety of machinery – General
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principles for design – Risk assessment and risk
reduction
IEC 62061, Safety of machinery – Functional
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safety of safety-related electrical, electronic and
programmable electronic control systems.
Correct use includes observing the relevant require-
ments for installation and operation, particularly
based on the following standards:
EN ISO 13849-1, Safety of machinery – Safety-re-
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lated parts of control systems – Part 1: General
principles for design
EN ISO 14119 (supersedes EN 1088), Safety of
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machinery – Interlocking devices associated with
guards – Principles for design and selection
EN 60204-1, Safety of machinery – Electrical
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equipment of machines.
Important!
The user is responsible for the proper integration
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of the device into 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
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of EN ISO 13849-1:2008 is used for determining
the Performance Level (PL), the PL might be re-
duced if several devices are connected in series.
Logical series connection of safe contacts is
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possible up to PL d in certain circumstances.
More information about this is available in
ISO TR 24119.
If a product data sheet is included with the prod-
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uct, the information on the data sheet applies
in case of discrepancies with the operating
instructions.
Safety precautions
WARNING
Danger to life due to improper installation or due
to bypassing (tampering). Safety components
perform a personal protection function.
Safety components must not be bypassed,
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turned away, removed or otherwise rendered
ineffective. On this topic pay attention in partic-
ular to the measures for reducing the possibility
of bypassing according to EN ISO 14119:2013,
section 7.
The switching operation must be triggered only
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by actuators designated for this purpose.
Prevent bypassing by means of replacement
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actuators. For this purpose, restrict access to
actuators and to keys for releases, for example.
Mounting, electrical connection and setup only
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by authorized personnel possessing special
knowledge about handling safety components.
Function
The safety switch monitors the position of movable
safety guards. The switching contacts are actuated
on the insertion/removal of the actuator.
Switching states
The detailed switching states for your switch can be
found in Figure 4. All available switching elements
are described there.
Safety guard open
The safety contacts are open.
Safety guard closed
The safety contacts are closed.
Selection of the actuator
NOTICE
Damage to the device due to unsuitable actuator.
Make sure to select the correct actuator (see
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table in Figure 5).
Increased overtravel of the actuator with a ver-
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tical approach direction is only possible with the
adapter NP-K.
Additionally pay attention to the door radius and
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the fastening options (see Figure 6).
The following versions are available:
Standard actuator with standard overtravel.
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Overtravel actuator with increased overtravel.
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Mounting
NOTICE
Device damage due to improper mounting and
unsuitable ambient conditions
Safety switches and actuators must not be used
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as an end stop.
Observe EN ISO 14119:2013, sections 5.2 and
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5.3, for information about fastening the safety
switch and the actuator.
Observe EN ISO 14119:2013, section 7, for
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information about reducing the possibilities for
bypassing an interlocking device.
Protect the switch head against damage, as well
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as penetrating foreign objects such as swarf,
sand and blasting shot, etc.
Changing the actuating direction
Figure 1: Changing the actuating direction
1. Remove the screws from the actuating head.
2. Set the required direction.
3. Tighten the screws with a torque of 0.8 Nm.
4. Cover the unused actuating slot with the en-
closed slot cover.
4
Mounting the adapter NP-K
Figure 2: Mounting the adapter NP-K
Remove the screws from the actuating head.
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Fit extension (1) to the plunger.
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Fit spacer (2) to the switch.
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Mount actuating head in the required direction
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using screws enclosed (3).

Electrical connection

WARNING
Loss of the safety function due to incorrect
connection.
Use only safe contacts ( ) for safety functions.
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When choosing the insulation material and
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wire for the connections, pay attention to the
required temperature resistance and the max.
mechanical load!
Figure 3: Opening the safety switch
Use of the safety switch as an interlocking
device for personnel protection
At least one contact must be used. This signals
the position of the safety guard (for terminal assign-
ment, see Figure 4).
The following information applies to devices
with plug connector:
Check that the plug connector is sealed.
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The following information applies to devices
with cable entry:
1. Use a suitable tool to open the insertion open-
ing.
2. Fit the cable gland with the appropriate degree
of protection.
3. Connect and tighten the terminals with 0.5 Nm
(for terminal assignment, see Figure 4).
4. Check that the cable entry is sealed.
5. Close the switch cover and screw in place
(tightening torque 0.8 Nm).
Function test
WARNING
Fatal injury due to faults during the function test.
Before carrying out the function test, make sure
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that there are no persons in the danger area.
Observe the valid accident prevention regula-
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tions.
Check the device for correct function after installa-
tion and after every fault.