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Operating Instructions
Safety Switch STM Pro
Selection of the actuator
NOTICE
Damage to the device due to unsuitable actuator.
f
Make sure to select the correct actuator (see
table in Fig. 6).
Additionally pay attention to the door radius and
f
the mounting options (see Fig. 5).
The following versions are available:
Actuator S-...-SN for safety switches without
f
insertion funnel.
Actuator S-...-LN for safety switches with insertion
f
funnel.
Manual release
Some situations require the guard locking to be
released manually (e.g. malfunctions or an emer-
gency). A function test should be performed after
release.
More information on this topic can be found in the
standard EN ISO 14119:2013, section 5.7.5.1. The
device can feature the following release functions:
Auxiliary release
In the event of malfunctions, the guard locking can
be released with the auxiliary release irrespective
of the state of the solenoid.
The contacts
are opened when the auxiliary
release is actuated. A stop command must be
generated with these contacts.
Actuating auxiliary release
1. Unscrew locking screw.
2. Using a screwdriver, turn the auxiliary release
to
in the direction of the arrow.
Guard locking is released.
Important!
The actuator must not be under tensile stress
f
during manual release.
To prevent tampering, the auxiliary release must
f
be sealed (with sealing lacquer, for example)
before the switch is set up.
The locking screw must be screwed back in and
f
sealed (with sealing lacquer, for example) after
mounting and after every use of the auxiliary
release. Tightening torque 0.5 Nm.
Mounting
NOTICE
Device damage due to improper mounting and
unsuitable ambient conditions.
Safety switches and actuators must not be used
f
as an end stop.
Observe EN ISO 14119:2013, sections 5.2 and
f
5.3, for information about mounting the safety
switch and the actuator.
Observe EN ISO 14119:2013, section 7, for
f
information about reducing the possibilities for
bypassing an interlocking device.
Protect the switch head against damage, as well
f
as penetrating foreign objects such as swarf,
sand and blasting shot, etc.
The specified IP degree of protection is applica-
f
ble only if the housing screws, cable entries and
plug connectors are properly tightened. Observe
the tightening torques.
The locking screw of the auxiliary release must
f
be sealed prior to setup (with sealing lacquer,
for example).
Changing the actuating direction
B
Fig. 2: Changing the actuating direction
1. Ensure a de-energized state.
2. Insert the actuator into the actuating head.
3. Remove the screws from the actuating head.
4. Set the required direction.
5. Tighten the screws with a torque of 0.8 Nm.
6. Remove actuator.
Only for STM1:
6a. Connect voltage to the solenoid and remove
actuator
or
6b. • Open cover
• Press armature down
• Remove actuator.
7. Cover the unused actuating slot with the en-
closed slot cover.
1
3
Fig. 3: Removing actuator
Electrical connection
WARNING
Loss of the safety function due to incorrect
connection.
Use only safe contacts (
and
f
functions.
When choosing the insulation material and
f
wires for the connections, pay attention to the
required temperature resistance and the max.
mechanical load!
Strip the insulation from the ends of the individual
f
wires over a length of 6
mm to ensure a safe
±1
contact.
Use of the safety switch as guard locking for
personnel protection
At least one contact
must be used. It signals
the guard locking state (for terminal assignment,
see Fig. 4).
6
Use of the safety switch as guard locking for
process protection
At least one contact
with the
symbol can also be used (for terminal
D
assignment, see Fig. 4).
B
C
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 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 0.8 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 area.
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.
2
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.
) for safety
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.
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.
must be used. Contacts
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