7
Operating Instructions
Safety Switches NZ.VZ-…VS
Mounting
NOTICE
Device damage due to improper mounting and
unsuitable ambient conditions
f
Safety switches and actuators must not be used
as an end stop.
f
Observe EN ISO 14119:2013, sections 5.2 and
5.3, for information about mounting the safety
switch and the actuator.
f
Observe EN ISO 14119:2013, section 7, for
information about reducing the possibilities for
bypassing an interlocking device.
f
Protect the switch head against damage, as well
as penetrating foreign objects such as swarf,
sand and blasting shot, etc.
f
The specified IP degree of protection is applica‑
ble only if the housing screws, cable entries and
plug connectors are properly tightened. Observe
the tightening torques.
Changing the actuating direction
2
3
4
1
B
C
D
E (A)
Approach direction in
the default setting on
delivery
Actuating head
Solenoid
Position in the default
setting on delivery
Fig. 3: Changing the actuating direction and the
locking solenoid
1. Insert the actuator into the actuating head.
2. Remove the screws from the actuating head.
3. Set the required direction.
4. Tighten the screws with a torque of 1.2 Nm.
5. Cover the unused actuating slot with the en‑
closed slot cover.
VSM and VSE:
f
Prior to making changes to the locking solenoid
the actuator must be inserted.
VSH:
f
The manual release must not be pressed during
the change.
Electrical connection
WARNING
Loss of the safety function due to incorrect
connection.
f
Use only safe contacts for safety functions.
f
When choosing the insulation material and
wires for the connections, pay attention to the
required temperature resistance and the max.
mechanical load!
f
Strip the insulation from the ends of the individual
wires over a length of 6
±1
mm to ensure a safe
contact.
Use of the safety switch as guard locking for
process protection
At least one contact must be used (see Fig. 4
for terminal assignment).
The following information applies to devices
with plug connector:
f
Check that the plug connector is sealed.
The following information applies to devices
with cable entry:
1. Use a suitable tool to open the desired inser‑
tion opening.
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 Fig. 4).
4. Check that the cable entry is sealed.
5. Close the switch cover and screw in place
(tightening torque 1.2 Nm).
Function test
WARNING
Fatal injury due to faults during the function test.
f
Before carrying out the function test, make sure
that there are no persons in the danger zone.
f
Observe the valid accident prevention regula‑
tions.
Check the device for correct function after installa‑
tion and after every fault.
Proceed as follows:
Mechanical function test
The actuator must slide easily into the actuating
head. Close the guard several times to check the
function. The function of any manual releases (except
for the auxiliary release) must also be tested.
Electrical function test
1. Switch on operating voltage.
2. Close all guards and activate guard locking.
¨
The machine must not start automatically.
¨
It must not be possible to open the guard.
3. Start the machine function.
¨
It must not be possible to release guard locking
as long as the dangerous machine function is
active.
4. Stop the machine function and release guard
locking.
¨
The guard must remain locked until the process
is no longer at risk.
¨
It must not be possible to start the machine
function as long as guard locking is released.
Repeat steps 2 ‑ 4 for each guard.
Inspection and service
WARNING
Danger of severe injuries due to the loss of the
safety function.
f
If damage or wear is found, the complete switch
and actuator assembly must be replaced. Re‑
placement of individual parts or assemblies is
not permitted.
f
Check the device for proper function at regular
intervals and after every fault. For informa‑
tion about possible time intervals, refer to
EN ISO 14119:2013, section 8.2.
Inspection of the following is necessary to ensure
trouble‑free long‑term operation:
f
correct switching function
f
secure mounting of all components
f
damage, heavy contamination, dirt and wear
f
sealing of cable entry
f
loose cable connections or plug connectors.
Info
: The year of manufacture can be seen in the
bottom, right corner of the type label.
Exclusion of liability and warranty
In case of failure to comply with the conditions for
correct use stated above, or if the safety regula‑
tions are not followed, or if any servicing is not
performed as required, liability will be excluded and
the warranty void.
Notes about
The following information applies to devices
with cable entry:
For use and application as per the requirements
of
a copper wire for the temperature range
60/75 °C must be used.
The following information applies to devices
with plug connector:
This device is intended to be used and applied with
a Class 2 power source in accordance with UL1310.
Connecting 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 that
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 that possess an
identical or higher dielectric strength compared to
the other relevant parts of the system.
EU declaration of conformity
The declaration of conformity is part of the operating
instructions, and it is included as a separate sheet
with the device.
The original EU declaration of conformity can also
be found at: www.euchner.com
Service
If servicing is required, please contact: EUCHNER
GmbH + Co. KG
Kohlhammerstraße 16
70771 Leinfelden‑Echterdingen
Service telephone
:
+49 711 7597‑500
:
Internet
:
www.euchner.com
Technical data
Parameter
Value
Housing material
Anodized die‑cast alloy
Weight
Approx. 0.75 kg
Degree of protection
IP65
Mechanical life
2 x 10
6
operating cycles
Ambient temperature
‑25 … +80 °C
Degree of contamination
(external, acc. to EN 60947‑1) 3 (industrial)
Installation orientation
Any
Approach speed, max.
20 m/min
Approach speed, min.
0.02 m/min (NZ.VZ‑511…)
Extraction force (not locked)
40 N
Retention force
35 N
Actuating force at 20 °C
(not locked)
45 N
Actuation frequency
7000/h
Switching principle of switch‑
ing elements
511
528, 538, 2121, 2131, 3131
Snap‑action switching contact
Slow‑action switching contact
Contact material
Silver alloy, gold flashed
Connection
NZ1VZ…
NZ2VZ…
Cable entry M20 x 1.5
Plug connector
Conductor cross‑section
(flexible/rigid)
NZ1VZ…
Z1VZ…L (with indicator LED)
0.34 … 1.5 mm²
max. 0.75 mm²
Conductor cross‑section of mating connector
SR6 (NZ2VZ‑5…)
SR11 (NZ2VZ‑2…/NZ2VZ‑3…)
0.5 … 1.5 mm²
0.5 mm
2