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Operating Instructions
Safety Switch STP-BI...
Selection of the actuator
NOTICE
Damage to the device due to unsuitable actuator.
Make sure to select the correct actuator (see
table in Figure 4).
Additionally pay attention to the door radius and
the mounting options (see Figure 3).
The following versions are available:
Actuator S for safety switches without insertion
f
funnel.
Actuator L for safety switches with insertion funnel.
f
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.
After use, reset the auxiliary release and screw
f
in and seal the locking screw (e.g. with sealing
lacquer).
Escape release
Permits opening of a locked guard from the danger
zone without tools.
Important!
It must be possible to actuate the escape re‑
f
lease manually from inside the protected area
without tools.
It must not be possible to reach the escape
f
release from the outside.
The actuator must not be under tensile stress
f
during manual release.
The escape release meets the requirements of
f
Category B according to EN ISO 13849‑1:2015.
The contacts
are opened when the escape
release is actuated. A stop command must be
generated with these contacts.
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.
NOTICE
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.
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.
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 individ‑
f
ual wires over a length of 6
mm to ensure a
±1
reliable 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 Figure 2).
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 Figure 2).
The following information applies to devices
with plug connector:
Check that the plug connector is sealed.
f
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.
6
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.
C
D
Repeat steps 2 ‑ 4 for each guard.
B
A
Bi-state function test
1. Switch on operating voltage and close the
guard.
2. Switch off operating voltage.
It must not be possible to open the guard.
¨
3. Switch on operating voltage.
4. Deactivate guard locking (switch on control
voltage) and open the guard
5. Switch off operating voltage.
It must be possible to close and open the guard
¨
as required.
Repeat the functional test individually 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.
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 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 unit.
The EU declaration of conformity can also be
found at: www.euchner.com
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