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Operating Instructions
Safety Switch STP...AS1
Selection of the actuator
NOTICE
Damage to the device due to unsuitable actuator.
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Make sure to select the correct actuator (see
table in Fig. 3).
Additionally pay attention to the door radius and
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the mounting options (see Fig. 4).
The following versions are available:
Actuator S for safety switches without insertion
f
funnel.
Actuator L for safety switches with insertion funnel.
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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 half-sequence is sent when the auxiliary release
is actuated.
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
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sealed (with sealing lacquer, for example) after
mounting and after every use of the auxiliary
release. Tightening torque 0.5 Nm.
Emergency release
This permits opening of a locked guard from outside
the danger area without tools.
Important!
It must be possible to operate the emergency
f
release manually from outside the protected
area without tools.
The emergency release must possess a mark-
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ing indicating that it may be used only in an
emergency.
The actuator must not be under tensile stress
f
during manual release.
The release function meets all other require-
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ments from EN ISO 14119.
The emergency release meets the requirements
f
of Category B according to EN ISO 13849-1.
The half-sequence is sent when the emergency
release is actuated.
Wire front release (bowden)
Release via a pull wire. Depending on the type of
attachment, the wire front release can be used as
emergency release or escape release.
Important!
The wire front release (bowden) meets the
f
requirements of Category B according to
EN ISO 13849-1.
The correct function depends on the laying of
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the pull wire and the attachment of the pull
handle, and this is the responsibility of the plant
manufacturer.
The actuator must not be under tensile stress
f
during manual release.
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
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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
Fig. 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
The safety switch is connected to the bus system
with a 4-pin connecting cable with M12 plug connec-
tor via a passive AS-Interface distribution box with a
yellow and black AS-Interface cable.
View of safety switch
plug connector
1 AS-Interface +
4
2 Auxiliary voltage 0 V
3 AS-Interface -
4 Auxiliary voltage 24 V
1
Fig. 2: Terminal assignment of M12 plug connector
The following information applies to devices
with plug connector:
Check that the plug connector is sealed.
f
7
Setup
Setting the AS‑Interface address
The address can be set prior to or after mounting.
The AS-Interface address of the safety switch is
set using an AS-Interface programming device.
Addresses 1 to 31 are valid.
The unit is programmed by connecting the program-
ming device to the M12 plug connector of the safety
switch with a programming cable.
Address 0 is the default setting on delivery (the
AS-Interface Fault LED is lit during operation).
Configuration in the AS‑Interface safety
monitor
(see operating instructions for the AS-Interface
safety monitor and status table)
The safety switch is configured in the AS-Interface
safety monitor with the AS-Interface address set as
follows, for example:
Dual-channel dependent
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Synchronization time = infinite
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In this operating mode, after the guard locking is
released, the guard must be opened each time prior
to restarting.
Dual-channel independent
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The guard locking is opened and closed using the
output D0. When the guard locking is open, the
safety circuit shuts down. It is not necessary to
open the door. Safety is provided again when the
guard locking is closed.
The dual-channel feature and the door contact
are not tested in this configuration. Additional
measures outside the monitor must be provided
for testing.
Dual-channel conditionally dependent
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Independent: In-1
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The guard locking is opened and closed using the
output D0. When the guard locking is open, the
safety circuit shuts down. It is not necessary to
open the door. Safety is provided again when the
guard locking is closed.
The switch is monitored for a malfunction.
C
D
B
A
Observe the following if the guard locking solenoid
of an STP3..AS1 spring interlock safety switch
is switched on (released) via the second release
contact of a dual-channel safety monitor and a PLC
in the operating mode door locking for duration of
the time delay:
It is not possible to switch off the guard locking
f
solenoid by means of the monitor alone.
The control system (PLC) must therefore switch off
the guard locking solenoid in the locked position via
AS-Interface output D0 = 0 in order to re-establish
the switch-on conditions for the first OSSD.
The AS-Interface output must be switched on
f
with D0 = 1 so that the guard locking solenoid
can be released by the second safety output of
the monitor.
Status signals (not relevant to safety)
The state of the AS-Interface input bits D0 and D1 for
door monitoring and the AS-Interface input bits D2
and D3 for solenoid monitoring can also be polled
by the control system (PLC) (refer to the operating
instructions for the AS-Interface safety monitor).
3
LED displays
The AS-Interface bus status is indicated by two LEDs
2
(Power, Fault).
Two additional LEDs can be connected via the
AS-Interface bus, e.g. to indicate the status signals
(see status signals and technical data).
∞
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