EUCHNER STP-TWxxxAS1 - Handbuch (Seite 6)

Operating Instructions Safety Switches STP-TW...AS
1
EUCHNER GmbH + Co. KG Kohlhammerstraße 16 D-70771 Leinfelden-Echterdingen Tel. +49/711/75 97-0 Fax +49/711/75 33 16 www.euchner.de [email protected]
Subject to technical modifications; no r
esponsibility is accepted for the accuracy of this information. © EUCHNER GmbH + Co. KG
102352-03-02/12 (translation of original operating instructions)
Mounting
Safety switches and actuators must not be used
as an end stop.
Mount the safety switch only in assembled
condition!
At ambient temperatures greater than 40 °C,
the switch must be protected against contact
with inflammable material or accidental touching.
To achieve the stated locking force, the mounting
holes on the switch head must also be used (see
figure 4).
Assemble the safety switch so that
f access to the switch is difficult for operating
personnel when the safety guard is open.
f it is possible to operate the mechanical release and
check and replace the safety switch.
Fit an additional end stop for the movable part of the
safety guard.
f Insert the actuator in the actuating head.
f Mount the safety switch positively.
f Permanently connect the actuator to the safety
guard so that it cannot be detached, e.g. using
the enclosed non-removable screws, rivets or
welding.
f Fit an additional stop for the movable part of the
safety guard.
Changing the actuating direction
Fig. 2: Changing the actuating direction
f Insert the actuator in the actuating head.
f Remove the screws from the actuating head.
f Set the required direction.
f Correct arrangement of the screws (see Figure 2).
f Tighten the screws with a torque of 0.6 Nm.
f Cover the unused actuating slots with the enclosed
slot covers.
Protection against environmental influences
A lasting and correct safety function requires that the
actuating head must be protected against the
penetration of foreign bodies such as swarf, sand,
blasting shot, etc.
Electrical connection
For use and operation as per the requirements of
(UL), an isolating transformer or a power supply
with secondary overcurrent protection (3 A) must be
used.
The safety switch is connected to the bus system
with a 4-core connecting cable with M12 plug
connector via a passive AS-Interface distribution box
with yellow and black AS-Interface cable.
Figure 3: Terminal assignment M12 plug connector
Setup
f Setting the AS-Interface address
The address can be set prior to or after assembly.
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 on the safety
switch with an AS-Interface programming device.
Address 0 is the default setting on delivery (the AS-
Interface LED
Fault! is lit during operation).
f 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:
f Two-channel dependent
f Synchronization time = infinite
∞
In this operating mode, the safety guard must be
opened each time prior to restarting in order to per-
form the start-up test.
f Dual-channel independent
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.
For the expanded monitor SFM-B02, the following
configuration is possible:
f Dual-channel conditionally dependent
f Independent: In-1
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 malfunction, the door
contact (SK) must not be switched before the guard
locking contact (ÜK).
Observe the following if the guard locking solenoid is
switched on (unlocked) 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 in case of spring interlock safety switch
STP-TW3...AS:
f It is not possible to switch off the guard locking
solenoid by means of the monitor alone.
The control system (PLC) must therefore switch off
the guard locking solenoid in locked position via
AS-Interface output D0 = 0 in order to re-establish
the switch-on conditions for the first OSSD.
f The AS-Interface output must be switched on with
D0 = 1 so that the guard locking solenoid can be
unlocked by the second safety output of the monitor.
f Status signals (not relevant to safety)
The state of the door monitoring contact SK and the
solenoid monitoring contact ÜK can also be polled
by the control system (PLC) (refer to the operating
instructions for the AS-Interface safety monitor).
f LED indicators
The AS-Interface bus status is indicated by two LEDs
(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).
Functional check
Warning! Danger of fatal injury as a result of faults
in installation and functional check.
Before carrying out the functional check, make
sure that there are no persons in the danger
area. Observe the valid accident prevention
regulations.
After installation and any fault, the safety function must
be fully checked. Proceed as follows:
f Mechanical function test
The actuator must slide easily into the actuating head.
Close the safety guard several times to check the
function.
f Electrical function test
1. Switch on operating voltage.
2. Close all safety guards.
Guard locking by solenoid force ¨ Activate
guard locking.
f The machine must not start automatically.
f It must not be possible to open the safety guard.
3. Enable operation in the control system.
f It must not be possible to deactivate the guard
locking as long as operation is enabled.
4. Disable operation in the control system and
deactivate guard locking.
f The safety guard must remain locked until there is
no longer any risk of injury.
f It must not be possible to start the machine as long
as the guard locking is deactivated.
Repeat steps 2 - 4 for each safety guard.
Inspection and service
If damage or wear is found, the complete switch
and actuator assembly must be replaced.
Replacement of individual parts or assemblies,
especially of the actuating head, is not permitted!
Note: The year of manufacture can be seen in the
bottom, right corner of the rating plate.
No servicing is required, but regular inspection of
the following is necessary to ensure trouble-free long-
term operation:
f correct switching function
f secure mounting of components
f dirt and wear
f loose plug connectors.
Exclusion of liability under the following
circumstances
f incorrect use
f non-compliance with safety regulations
f installation and electrical connection not performed
by authorized personnel
f failure to perform functional checks.
1 AS-Interface +
2 Auxiliary voltage 0 V
3 AS-Interface -
4 Auxiliary voltage24 V
View of safety switch
plug connector
4 3
1 2