Leuze L300 Operating Instructions
L300 safety locking devices
1 INFORMATION ON THIS DOCUMENT
1.1 Function
The present operating instructions provide information on installation, connection and
safe use for the following par ts: L300, AC-L300-xCA
1.2 Target audience
The operations described in these operating instructions must be carried out by qualifi ed personnel only, who are fully capable of understanding them, and with the technical qualifi cations required for operating the machines and systems in which the safety
devices are to be installed.
1.3 Area of application
These operating instructions apply exclusively to the devices listed in section Function, and their accessories.
1.4 Original instructions
The German language version is the original set of operating instructions. Versions
provided in other languages are translations of the original instructions.
2 SYMBOLS USED
This symbol indicates any relevant complementary information
Attention: Any failure to observe this warning note can cause damage or mal-
function, including possible loss of the safety function.
3 DESCRIPTION
3.1 Device description
The safety device described in these operating instructions is defi ned as a
coded, type-4 interlock device with guard interlocking and without contact acc. to
EN ISO 14119.
The safety switches with electromagnet and RFID technology, for which these operating instructions apply, are safety devices for the monitoring of gates, safety doors,
enclosures and all protective devices that safeguard the parts of machines with or
without stopping time.
3.2 Intended use of the device
- The device described in these operating instructions is designed to be used on
industrial machines for condition monitoring of movable protective devices.
- The direct sale of this device to the public is prohibited. Installation and use must
be carried out by qualifi ed personnel only.
- The use of the device for purposes other than those specifi ed in these operating
instructions is prohibited.
- Any use other than as expressly specifi ed in this operating manual shall be considered unintended by the manufacturer.
- Also considered unintended use:
a) Using the device after having made structural, technical, or electrical modifi ca-
tions to it;
b) using the product in an area of application other than as described in section
TECHNICAL DATA.
4 MOUNTING INSTRUCTIONS
Attention: Installing a protective device is not suffi cient to ensure personnel
safety or compliance with machine safety standards or directives. Before installing a
protective device, perform a specifi c risk analysis in accordance with the key health
and safety requirements in the Machinery Directive. The manufacturer guarantees
only the safe functioning of the device to which these operating instructions refer, and
not the functional safety of the entire machine or system
4.1 Actuation directions
It is advisable to use actuators with a high coding level so as to make the installation safer and more fl exible. This will render it unnecessary to screen the device, to fi t it
in non-accessible areas or to follow other prescriptions specifi ed by the EN ISO 14119
standard for actuators with low coding level.
4.3 Selection of the operating principle
Attention: The safety switch is available with two operating principles:
1. SLM24 operating principle (quiescent current principle – The locking element is
held in the protective position by spring force): actuator locked if electromagnet
is deactivated.
2. MLM24 operating principle (open circuit current principle – The locking element is
held in the protective position by electromagnetic force): actuator locked if electromagnet is activated.
With the SLM24 operating principle (quiescent current principle), the actuator stays
locked even if the machine is disconnected from the power supply. Therefore, if the
machine has dangerous movements with inertia, inaccessibility to dangerous parts
(actuator locked) is ensured, even in the event of a sudden power failure. On the
contrary, if the machine structure allows a person to enter the danger area with the
whole body and possibly end up being stuck inside the machine, the switch must be
provided with an escape release button, in order to allow the trapped person to get out
even in case of power failure.
With the MLM24 operating principle (open circuit current principle), the actuator stays
locked only when the machine is connected to the power supply. Therefore, before
choosing this operation principle, carefully evaluate all dangers deriving from sudden
power failure with a possibly immediate actuator release.
The choice of SLM24 or MLM24 operating principle must always be made following a
risk analysis of the specifi c application.
In case of machines without inertia, i.e. with dangerous elements being immediately blocked as soon as the safety door is opened, for which a safety device with lock
has been chosen merely to safeguard the production process, the quiescent current
principle or the open circuit current principle can both be used.
4.4 Operating mode selection for activation of safety outputs
Warning: the device is available with three different safety outputs activation
modes:
- Mode 1 (part L300-xxx-Mx1-xx): safety outputs active if actuator is inserted
and locked;
- Mode 2 (part L300-xxx-Mx2-xx): safety outputs active if actuator is inserted;
- Mode 3 (part L300-xxx-Mx3-xx): OS1 safety output active if actuator is inserted
and locked and IS1 is active, OS2 safety output active if actuator is inserted and
IS2 is active.
Mode 1 activates the OS safety outputs when the actuator is both inserted and locked,
so that the actuator cannot be extracted with the safety outputs activated. In mode 1
the device is coded, type 4 (interlock with lock) acc. to EN ISO 14119.
In mode 2, the actuator can be locked/unlocked for special applications while still kept
on the safety chain, typically for specifi c applications without stopping time, when the
risk does not continue after the opening of the protective device. In mode 2 the device
is coded, type 4 (interlock without lock) acc. to EN ISO 14119.
For specifi c applications, mode 3 provides a channel with "mode 1" functionality, and a
channel with "mode 2" functionality. This allows emulation of electromechanical interlock devices with guard interlocking, without complex machine wiring modifi cations.
Using modes 2 and 3 must always follow a risk analysis on the specifi c application,
with particular focus on the function of cascaded mode 3 devices.
The centring symbols on the device and actuator must be aligned with each
other.
4.2 Selection of the actuator type
Attention: The switch is available with two RFID actuator types: one with a high
coding level (part AC-L300-UCA) and one with a low coding level (par t AC-L300SCA). In the case where an actuator with a low coding level has been chosen, ensure
that the additional specifi cations prescribed in section 7.2 of the EN ISO 14119:2013
standard are respected during installation.
Attention: If the chosen actuator has a low level of coding, any other low level
coded actuators present in the same place where the device has been installed must
be segregated and kept under strict control in order to avoid any bypassing of the
safety device. If new low level coded actuators are fi tted, the original low level coded
actuators must be disposed of or rendered inoperable.
1
Subject to modifi cations 2019/03/22 Part no. 50130051
4.5 Mounting the device
Before mounting the device: if necessary, it is possible to
adjust the position of the head and the auxiliary release (if
present) in order to turn the device to the most appropriate
position for the specifi c application. Fully remove the 4
head screws in order to independently turn either the head
or the auxiliary release over an arc of 270°.
Attention: Do not force rotation beyond 270° as this
could cause damage to the device. Once adjustment is
complete, re-tighten the head screws with a torque between 0.8 and 1.2 Nm.
Once the head of the device is in position, you must use the two safety screws supplied, in place of the two original screws, at opposite corners.
Attention: Always fi x the device with 4 M5 screws with
property class 8.8 or higher, and fl at seating heads. Install the
screws with medium thread lock, and a number of threads
engaged equal to or greater than the screw diameter. The device
must never be fi xed with less than 4 screws. Tighten the 4 M5
screws to a torque from 2 to 3 Nm.
It is advisable to install the device in the top part of the door,
in order to prevent any dirt or work residues from getting inside
the hole where the actuator is to be introduced. In order to avoid
device bypassing, it is advisable to fi x the device housing to the
machine frame so that it cannot be removed.
4.6 Mounting the actuator to the protective device
Attention: As required by EN ISO 14119, the actu-
ator must be fi xed immovably to the door frame.
Always fi x the actuator with 4 M5 screws with property class 8.8 or higher, and fl at seating heads. Install
the screws with medium thread lock, and a number of
threads engaged equal to or greater than the screw
diameter. The actuator must never be fi xed with less than
4 screws. Tighten the 4 M5 screws to a torque from 2 to 3 Nm.
After the fi xing operation, it is mandatory to plug the holes of the 4 screws using the
caps supplied. Using the caps is considered a supplementary measure to reduce the
potential of actuator disassembly to a minimum, in accordance with EN ISO 14119.
For correct mounting, other means can also be used, such as rivets, non-removable
one-way security screws or other equivalent mounting systems, as long as they can
ensure adequate mounting.
4.7 Device-actuator alignment
4.8 Escape release button
Some of the device versions are provided with an escape release button in order to
allow any personnel accidentally trapped inside the machine to get out. This button,
complying with the EN ISO 14119 standard, directly acts on the lock mechanism and
immediately releases the actuator regardless of the operating state of the device.
Pressing this button causes:
- In mode 1: immediate deactivation of the OS1, OS2 safety outputs and of the
O4 signal output;
- In mode 2: immediate deactivation of the O4 signal output only;
- In mode 3: immediate deactivation of the OS1 safety output and of the O4 signal
output.
This escape release button unlocks the protective device even if the device is
not powered on.
For correct installation of the escape release button, the following notes must be
observed.
- The escape release button must be clearly visible from inside
the machine.
- Button activation must be easy, immediate and independent
from the machine operating state; for easier recognition of
the button and explanation of its function, stickers are available in various languages.
- For an operator standing outside the machine, the escape
release button must not be within immediate reach when the
safety door is closed.
- To guarantee correct operation and safe resetting, a distance
ranging from 10 to 35 mm must be kept between the wall on
which the button is mounted and the escape release button.
- The release button sliding area is to be kept clean. Any
ingress of dirt or chemical substance can compromise device
operation.
- The personnel concerned must be adequately trained on correct button operation, so as to avoid any improper use (i.e. the button must not
be used as a clothing hook).
- The escape release button must not be used as a machine emergency stop.
For installation on walls thicker than 20 mm, extensions are available for the release
button.
Attention: Although the device is
designed to facilitate alignment between
the device and actuator, excessive misalignment could damage the device.
Periodically check the correct alignment
between the safety device and its
actuator.
Maximum misalignment permitted from
the hole axis for rigid doors: ± 2 mm vertical and horizontal.
The actuator must not hit the outside of the actuator inlet area, and must not be used
as a centering device for the safety door.
In the case of application on swing doors, check that the radius between the axis of the
actuator and the axis of the hinge fi tted on the door is greater than 150 mm.
Do not use a hammer for the adjustments, unscrew the screws and adjust the device
manually, then tighten it in position.
This device is not suitable for applications in which the protective device with the
permanently attached actuator allows misalignments such as the actuator shaft not
entering through the corresponding hole of the device with the door completely closed.
The device is provided with a through hole for inserting the actuator. In the case
where it is used in dusty places, make sure not to obstruct the outlet hole opposite the
inlet hole. This way, any dust which may go inside the hole will always be allowed to
come out of the opposite side.
For correct installation of the extensions, the following notes must be observed:
- Do not exceed an overall length of 500 mm between the release button and the
device;
- Always use medium screw locking adhesive on every screw connection between
button, extensions, and safety device;
- Avoid twisting or bending the release button, if necessary use an appropriate
sliding guide (pipe or bush) when the button and its extensions exceed a length
of 100 mm;
- Tightening torque for button and extensions from 4 to 5 Nm.
4.9 Auxiliary release with a tool or lock
Some of the device versions are provided with an auxiliary release in order to allow
easy installation (release with a screwdriver) or to permit opening for authorized
personnel only (lock release). Both these mechanical release devices act inside the
safety device like the escape release button previously described. Therefore they also
unlock the protective device in case of power failure. These auxiliary release may
only be operated by qualifi ed personnel who has received adequate training on the
dangers deriving from their use.
4.9.1 How to use the auxiliary release with a screwdriver
- Unscrew the locking screw with a PH1 cross-head screwdriver
- Turn the hexagon socket clockwise by 180°
- Do not force the hexagon socket beyond 180°
- To avoid any improper use of the auxiliary release with a tool, it
is advisable to seal the device through the appropriate hole found
in the upper part, or to seal the screw cross head with a few drops
of paint.
- After each actuation, it is advisable to reseal the device.
2
4.9.2 How to use the auxiliary release with lock
1
1
2
6
1
2
6
- Open the protection cap.
- Insert the key supplied with the device and turn clockwise by 180°.
- Do not force the key beyond 180°.
- Each time the key is extracted, close the rubber cap.
- The release key must only be made available to the
machine maintenance engineer and kept in a secluded
place.
- The release key must not be made available to the
machine operator.
- Never leave the release key inserted in the device during normal machine operation.
For particular applications, versions are available without any auxiliary release
device.
4.10 Electrical connections of the device
All L300 device models are supplied with a wire bridge between IE1 (pin 8) and IE2
(pin 9) of the internal terminal strip. This means that they are preset for "single-channel
activation of the electromagnets" via I4 (pin 3 of the internal terminal strip). If this wire
bridge is removed, electromagnet activation via IE1 and IE2 is mandatory.
Attention: The device is fi tted with OSSD type semiconductor electronic safety
outputs. These outputs behave differently from electromechanical contacts. Use and
installation of a safety device with semiconductor outputs is only permitted if all characteristics of this particular type of outputs are known in detail.
4.10.1 Internal terminal strip for devices with standard cover
To open the device cover, use a PH2 cross-head screwdriver, and tighten the screws
to a torque between 0.8 and 1.2 Nm.
1
9
0
8
4
5
11
M12 con-
nector,
12-pin
12
7
6
3
M12 con-
nector,
Stand-
alone
connection
2345678
1
10
11 121314
Internal
terminal
switches
Attention: terminals 7, 17, 18, of the internal terminal strip must not be used.
(a) Only L300-xxx-M5x version available.
(b) For article L300-xxx-M6x, the output signals the error state of the device.
(c) In single-channel actuation mode, inputs IE1 and IE2 must be short-circuited.
(d) For article L300-xxx-M7x, the O3 and O4 signal outputs have negative function logic (active
signal low).
9
15 161718
strip
for
1
2
3
4
5
6
8
9
10
11
12
13
14
15
16
Connection
Power supply
A2
B2
I4
O3
O4
I3
IE1
IE2
A1
B1
input 0 V
Auxiliary power supply
output 0 V
Input for activation of
the electromagnet in
single-channel opera-
tion (c)
Signal output for
inserted actuator (d)
Signal output for
inserted and locked
actuator (b) (d)
Actuator programming
input / reset
Input for activation of
the electromagnet in
two-channel operation
Input for activation of
the electromagnet in
two-channel operation
Power supply input
+24 VDC
Auxiliary power supply
output
+24 VDC, max. 8 A
IS1 Safety input 2 2 / 2
IS2 Safety input 6 6 / 6
I5 EDM input (a) 11 11 / /
OS1 Safety output 4 4 4 4
OS2 Safety output 7 7 7 7
M23 con-
2
3
nector,
12-pin
3333
3333
10 10 8 8
552 /
9955
886 /
10 10 / /
12 12 / /
1111
1111
4.10.2 Internal terminal strip for devices with integrated command devices
The switch can be supplied with a cover equipped with one to three integrated command devices. The following table illustrates the standard connections for these
devices. Other confi gurations are available on request.
19
20 212223
24 25
26
27
28 29 3031
32 33
34
4
8-pin
7
5
8
7
3
4
8
M12 con-
nector
8-pin
Series
connection
with Y-con-
nectors
Internal terminal
strip for inte-
grated command
devices (a)
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Contact 1
Contact 2
Contact 1
Contact 2
Contact 1
Contact 2
Power supply input +24 VDC / device 1 LED
Power supply input +24 VDC / device 2 LED
Power supply input +24 VDC / device 3 LED
Power supply input 0 V / LED
Connection
Device 1
Device 2
Device 3
(a) terminals 1-16, see section 4.10.1
4.10.3 Switch with integrated command devices and cable inlet
3 command devices 2 command devices 1 command device
19
1
A2
B2
I4
O3
O4
I3
IE1
IE2
A1
5
B1
IS1
IS2
I5
OS1
OS2
20
2
21
3
22
4
23
5
24
6
25
8
26
9
27
10
28
11
29
12
30
13
31
14
32
15
33
16
34
L300-Bx-xxxC3
1
A2
2
B2
3
I4
4
O3
5
O4
6
I3
8
IE1
IE2
9
A1
10
B1
11
IS1
12
IS2
13
I5
14
OS1
15
OS2
16
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
1
A2
2
B2
3
I4
4
O3
5
O4
6
I3
8
IE1
IE2
9
A1
10
B1
11
IS1
12
IS2
13
I5
14
OS1
15
OS2
16
4.10.4 Switch with integrated command devices and M23 connector, 19-pin
12
1
11
2
18
10
13
17
9
3
19
141516
8
4
7
5
6
M23 connector,
19-pin
19
19
1
8
9
7
6
6
2
3
12
4
5
17
6
/
/
15
6
/
/
10
11
13
14
18
16
/
19
Attention: terminals 7, 17, 18, of the internal terminal strip must not be used.
(a) Only L300-xxx-M5x version available.
(b) For article L300-xxx-M6x, the output signals the error state of the device.
(c) IE1 and IE2 are not available for this connector version.
(d) For article L300-xxx-M7x, the O3 and O4 signal outputs have negative function logic (active
A2 Power supply input 0 V
B2 Auxiliary power supply input 0 V
I4 Input for activation of electromagnet (c)
O3 Signal output for inserted actuator (d)
O4 Signal output for inserted and locked actuator (b) (d)
I3 Programming input for teaching in a new code
A1 Power supply input +24 VDC
B1 Auxiliary power supply output +24 VDC, max. 8 A
IS1 Safety input
IS2 Safety input
I5 EDM input (a)
OS1 Safety output
OS2 Safety output
Contact 1
Contact 2
Contact 1
Contact 2
Contact 1
Contact 2
Power supply input +24 VDC / device 1 LED
Power supply input +24 VDC / device 2 LED
Power supply input +24 VDC / device 3 LED
Power supply input 0 V / LED
Connection
Device 1
Devices 2
Devices 3
3
1
2
3
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
1
2
3
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