5
Operating Instructions
Safety Switch NZ.R...EX
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 actuating element must move easily. Close the
guard several times to check the function.
Electrical function test
1. Switch on operating voltage.
2. Close all guards.
¨
The machine must not start automatically.
3. Start the machine function.
4. Open the guard.
¨
The machine must switch off and it must not be
possible to start it as long as the guard is open.
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
must be replaced. Replacement 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.
f
Do not open, service or repair in an area in which
an explosive atmosphere may be present.
f
Switches and actuators must be regularly freed
of dirt and cleaned.
f
Avoid electrostatic charging – clean only with
a damp cloth!
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.
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
Technical data
Parameter
Value
Housing material
Anodized die-cast alloy
Degree of protection
IP67
Mechanical life
30x10
6
operating cycles
Ambient temperature
-20 ... +75 °C
Installation orientation
Any
Approach speed, max.,
with actuator RS
20 m/min
Approach speed, min.
0.1 m/min
Actuating force at 20 °C
30 N
Actuation frequency, max.
7,000/h
Connection
Cable gland M20x1.5
(included)
Clamping range for the
cable gland
6.5 ... 12 mm
Conductor cross-section
(rigid/flexible)
0.34 ... 1.5 mm
2
Rated insulation voltage
U
i
= 50 V
Rated impulse withstand voltage
U
imp
= 2.5 kV
Conditional short-circuit current
100 A
Degree of contamination
(external, acc. to EN 60947-1)
3 (industrial)
Rated data for the switching elements
ES528H/ES538H
SK2121H/SK2131H/SK3131H
Switching principle of switching element
Slow-action switching contact
Slow-action switching contact
Contact material
Silver alloy, gold flashed
Silver alloy, gold flashed
Switching voltage, min.,
at 10 mA
12 V
12 V
Utilization category
acc. to IEC 60947-5-1
AC-15 4 A 50 V
DC-13 4 A 24 V
AC-15 4 A 50 V
DC-13 6 A 24 V
Switching current, min.,
1 mA
10 mA
1 mA
10 mA
at switching voltage
DC 24 V
DC 12 V
DC 24 V
DC 12 V
Convent. thermal current I
th
4 A
4 A
Short circuit protection (control
circuit fuse) acc. to IEC 60269-1
4 A gG
4 A gG
Reliability values acc. to EN ISO 13849‑1
depending on the switching current at 24 V DC
At DC-13 100 mA/24 V
≤ 0.1 A
B
10D
ES528H/ES538H
2 x 10
7
SK2121H/SK2131H/SK3131H
2 x 10
7
ATEX rating
II3G Ex nR IIB T5 Gc X
II3D Ex tc IIIC T100°C Dc
Service
If servicing is required, please contact:
EUCHNER GmbH + Co. KG
Kohlhammerstraße 16
70771 Leinfelden-Echterdingen
Germany
Service telephone
:
+49 711 7597-500
E‑mail
:
Internet
:
www.euchner.com
