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Leuze electronic L250 Manual page 6

Safety locking devices

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are to be carried out in the proximity of the previously installed device, it must fi rst
be moved away from the work area.
- If the device is installed outdoors, it must be protected from direct UV radiation.
- When the device is installed on a mobile door frame and the actuator is installed
on a mobile door, check that the device isn't damaged by simultaneous opening of
the frame and the door.
- After installation, check for correct operation of the auxiliary release (if present) and
the escape release button.
- Always attach these operating instructions to the manual of the machine in which
the device is installed.
- These operating instructions must be kept available for consultation at any time and
for the whole period of use of the device.
6.2 Not to be used in the following areas
- An environment where continuous temperature changes cause condensation
inside the device.
- An environment where the application causes the device to be subject to strong
impact or vibration.
- In environments containing explosive or infl ammable gases or dusts.
- An environment where the device may become coated with ice.
- An environment containing strongly aggressive chemicals, where the products
coming into contact with the device may impair its physical or functional integrity.
- An environment where contamination can get in the insertion opening of the actu-
ator and be deposited inside, which can lead to sealing gasket damage, can stop
the fi xing pin from sliding or damage it.
6.3 Mechanical limit stop
Attention: The door must always be provided with an independent mechanical
limit stop at the end position.
Do not use the device as mechanical limit stop for the door.
6.4 Maintenance and function tests
Attention: Do not disassemble or try to repair the device. In case of any malfunc-
tion or fault, replace the entire device.
Attention: In case of any damage or wear, the entire device with actuator must
be replaced. Correct operation cannot be guaranteed when the device is deformed
or damaged.
- The device installer is responsible for establishing the sequence of function tests to
which the installed device is to be subjected to before machine commissioning and
during maintenance intervals.
- The testing sequence can vary according to machine complexity and circuit dia-
gram, therefore the functional test sequence detailed below is to be considered as
minimal and not exhaustive.
- Perform the following sequence of checks before the machine is commissioned and
at least once a year (or after a prolonged shutdown):
1. Lock the protective device and start the machine. It must be impossible for the
protective device to be opened when pulling the actuator with locking force F
2. Try to start the machine while the protective device is open. The machine must
not start.
3. Check correct actuator to device alignment. If the actuator insertion opening is
worn, replace the entire device and actuator assembly.
4. When the escape release button (if present) is pressed, the protective device
must open freely and the machine must not start. Each time the escape release
button is activated, the machine must stop and the protective device must open
immediately. The escape release button must slide freely and be tightly screwed
in. The signs placed inside the machine, indicating the function of the escape
release button (if fi tted), must be intact, clean and clearly readable.
5. When the auxiliary release (if present) is activated, the protective device must
open freely and the machine must not start (for devices with mode 3, check that
the machine shows the expected behavior).
6. If the protective device is closed but not locked, it must not be possible for the
machine to start (not applicable in mode 2, for devices with mode 3, check that
the machine shows the expected behavior).
7. All external parts must be undamaged.
8. If the device is damaged, replace it completely.
9. The actuator must be securely locked to the safety door. Check that none of
the operating personnel's tools can be used to disconnect the actuator from
the door.
10. The device has been created for applications in dangerous environment, there-
fore its mission time is limited. 20 years after its production date, the device must
be totally replaced, even when still working. The production date is placed next
to the part number (see section MARKINGS).
6.5 Wiring
Attention: Check that the supply voltage is correct before powering the device.
- Keep the loading within the reference values of the respective electrical usage
categories.
- Only connect and disconnect the device when the power is off.
- Never open the device under any circumstances.
- Discharge static electricity before handling the product, by making contact with a
metal mass connected to earth. Any strong ESD could damage the device.
- Power the safety device and other connected components from one single SELV-
type source and in conformity with the relevant standards.
- Always connect the protection fuse (or equivalent device) in series with the power
supply for each device.
- During and after mounting, do not pull the electrical cables connected to the device.
- For devices with integrated cable, the free end of the cable (if it does not have a
connector) must be properly connected inside a protective housing. The connection
cable must be adequately protected from cuts, impacts, abrasion, etc.
6.6 Additional prescriptions for safety applications with personal protection
functions
Provided that all previous prerequisites are fulfi lled, and the devices installed are
intended to ensure personnel protection, the following additional regulations are also
to be observed:
Device operation implies the knowledge and observation of the following stan-
dards: EN 60947-5-3, EN ISO 13849-1, EN 62061, EN 60204-1, EN ISO 14119,
EN ISO 12100.
6.7 Limitations of use
- By connecting the two electromagnet activation inputs IE1, IE2 on two distinct
channels to two OSSD safety outputs of a safety PLC or safety module, the device
can be used as a component with interlocking functions in a safety system with
safety category 4 /PL e according to EN ISO 13849-1 and safety integrity level
SIL CL 3 according to EN 62061.
- By connecting both electromagnet activation inputs IE1 and IE2 to the same chan-
nel, the device can be used as a component with interlocking functions in a safety
system with safety category 2 / PL d according to EN ISO 13849-1 and safety
integrity level SIL CL 2 according to EN 62061. Any fault on the single activation
line of the electromagnets can cause the actuator to be released, and the safety
outputs switched off.
- Use the device following the operating instructions, complying with its operation
limits and the valid safety regulations.
- The devices have precise application limitations (minimum and maximum ambient
temperature, mechanical working life, IP degree of protection, etc.) Each of these
limitations must be met by the device.
- The manufacturer's liability is to be excluded in the following cases:
1. Use not conforming to the intended purpose;
2. Failure to adhere to these instructions or regulations in force;
3. Mounting work not carried out by qualifi ed and authorized personnel;
4. The omission of function tests.
- Please contact customer service for the cases listed below, before proceeding with
the installation (see section SUPPORT):
a) Nuclear power stations, trains, airplanes, motorcars, incinerators, medical
appliances or any other applications where the safety of two or more persons
.
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depends on correct device operation;
b) Applications not contemplated in these operating instructions.
- Permanent application of maximum locking force F
- The machine manufacturer must take the shut down time into account for machines
with stopping time.
6
is not permitted.
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