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Operating Instructions
Safety Switch STA...EX
Use of the safety switch as guard locking for
process protection
At least one contact
must be used. Contacts
with the
symbol can also be used (for terminal
assignment, see Fig. 3).
The following information applies to devices
with cable entry:
1. Fit the supplied ATEX cable gland (M20 x 1.5).
Pay attention to the clamping range!
2. Connect and tighten terminals with 0.5 Nm (for
terminal assignment, see Fig. 3).
3. Check that the cable entry is sealed.
4. Close the switch cover and fit the protective
plate (tightening torque 1.5 Nm).
Function test
WARNING
Fatal injury due to faults during the function test.
Before carrying out the function test, make sure
f
that there are no persons in the danger zone.
Observe the valid accident prevention regula-
f
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 there is no
¨
longer any risk of injury (e.g. due to movements
with overtravel).
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.
If damage or wear is found, the complete switch
f
and actuator assembly must be replaced. Re-
placement of individual parts or assemblies is
not permitted.
Check the device for proper function at regular
f
intervals and after every fault. For informa-
tion about possible time intervals, refer to
EN ISO 14119:2013, section 8.2.
Do not open, service or repair in an area in which
f
an explosive atmosphere may be present.
Switches and actuators must be regularly freed
f
of dirt and cleaned.
Avoid electrostatic charging – clean only with
f
a damp cloth!
Inspection of the following is necessary to ensure
trouble-free long-term operation:
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.
f
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.
Declaration of conformity
The EU declaration of conformity can be found at
www.euchner.com. Enter the order number of your
device in the search box. The document is available
under Downloads.
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:
support@euchner.de
Internet:
www.euchner.com
8
Technical data
Parameter
Value
Housing material
Die-cast alloy
Degree of protection
IP67
Mechanical life
1x10
operating cycles
6
Ambient temperature
-20 ... +75 °C
Degree of contamination (ex-
3 (industrial)
ternal, acc. to EN 60947-1)
Installation orientation
Any
Approach speed, max.
20 m/min
Extraction force (not locked)
30 N
Retention force
20 N
Actuating force, max.
35 N
Actuation frequency
1,200/h
Switching principle
Slow-action switching contact
Contact material
Silver alloy, gold flashed
Connection
Cable entry M20x1.5 (ATEX cable
gland included)
Clamping range for the
6.5 ... 12 mm
cable gland
Connection cross-section
0.34 ... 1.5 mm
(flexible/rigid)
Rated insulation voltage
U
= 50 V
i
Rated impulse withstand
U
= 2.5 kV
voltage
imp
Conditional short-circuit
100 A
current
Switching voltage, min., at
12 V
10 mA
Utilization category acc. to
AC-15 4 A 50 V
IEC 60947-5-1
DC-13 4 A 24 V
Switching current, min., at
1 mA
24 V
Short circuit protection
(control circuit fuse) acc. to
4 A gG
IEC 60269-1
Convent. thermal current I
4 A
th
Solenoid operating voltage/solenoid power consumption
STA...024
AC/DC 24 V (+10%/-15%) 8 W
Duty cycle
100%
Locking force
F
max
ACTUATOR S-G-...,
HINGED ACTUATOR S-...
3,000 N
ACTUATOR S-WQ-...
2,000 N
ACTUATOR S-W-...
1,500 N
Characteristics acc. to EN ISO 13849-1
Monitoring of guard locking and the guard position
B
10D
11.5 x 10
6
at DC-13 100 mA/24 V
ATEX rating
II3G Ex nR IIB T4 Gc X
II3D Ex tc IIIC T110°C Dc X
2
F
Zh
2,300 N
1,500 N
1,100 N
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