Leuze electronic L250 User manual

1
© Leuze electronic GmbH + Co. KG, In der Braike 1, 73277 Owen, Phone: [phone], Fax: -199, [email protected], www.leuze.com Subject to modifi cations 2019/03/22 Part no. 50142334
L250 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 parts: L250, AC-L250-xCA.
1.2 Target audience
The operations described in these operating instructions must be carried out by quali-
fied personnel only, who are fully capable of understanding them, and with the techni-
cal qualifications 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 Func-
tion, and their accessories
1.4 Original instructions
The Italian language version is the original set of operating instructions. Versions pro-
vided 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 defined 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 oper-
ating instructions apply, are safety devices for the monitoring of gates, safety doors,
enclosures and all protective devices that safeguard the parts of machines.
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 qualified personnel only.
- The use of the device for purposes other than those specified in these operating
instructions is prohibited.
- Any use other than as expressly specified in this operating manual shall be consid-
ered unintended by the manufacturer.
- Also considered unintended use:
a) Using the device after having made structural, technical, or electrical modifica-
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 sufficient to ensure personnel
safety or compliance with machine safety standards or directives. Before installing a
protective device, perform a specific 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
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-L250-UCA) and one with a low coding level
(part AC-L250-SCA). In the case where an actuator with a low coding level has been
chosen, ensure that the additional specifications 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 fitted, the original low level coded
actuators must be disposed of or rendered inoperable.
It is advisable to use actuators with a high coding level so as to make the installa-
tion safer and more flexible.This will render it unnecessary to screen the device, to fit it
in non-accessible areas or to follow other prescriptions specified 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. SL operating principle (quiescent current principle – The locking element is held
in the protective position by spring force): actuator locked if electromagnet is
deactivated.
2. ML operating principle (open circuit current principle – The locking element is held
in the protective position by electromagnetic force): actuator locked if electromag-
net is activated.
With the SL 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 their whole body and
possibly end up being stuck inside the machine, the device 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 ML 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 operating principle must always be made following a risk analysis of the
specific application.
In case of machines without inertia, i.e. with dangerous elements being immedi-
ately 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 first or the second
operating 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 L250-Px1SL-xxx, L250-Px1ML-xxx): safety outputs active if actua-
tor is inserted and locked.
- Mode 2 (part L250-Px2SL-xxx, L250-Px2ML-xxx): safety outputs active if actu-
ator is inserted.
- Mode 3 (part L250-Px3SL-xxx, L250-Px3ML-xxx): OS1 safety output active if
actuator is inserted and locked and IS1 is active, OS2 safety output active if actua-
tor 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 specific 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 specific applications, mode 3 provides a channel with "mode 1" functionality, and a
channel with "mode 2" functionality. This allows emulation of electromechanical inter-
lock devices with guard interlocking, without complex machine wiring modifications.
Using modes 2 and 3 must always follow a risk analysis on the specific application,
with particular focus on the function of cascaded mode 3 devices.

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4.5 Mounting the device
If necessary, before mounting the device, it is possible to adjust the
position of the auxiliary release (if present) and of the outgoing line
in order to turn the device to the most appropriate position for the
specific application. Fully remove the 4 fastening screws in order to
rotate the modules by 90°. The connection output module has a
mechanical limit stop that prevents rotation of more than 270°.
Attention: Do not force rotation of the electrical connection
module beyond 270° as this could damage the device.
After correct positioning of the modules, re-tighten the fixing screws
with a tightening torque between 0.8 and 1.2 Nm and close the
holes with the provided caps in order to prevent the build-up of
grime.
The device may be fixed on two sides, using the fixing holes either
on the front or on the side of the housing.
Attention: Always fix the device with 2 M5
screws with property class 8.8 or higher, and flat
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 fixed with less than 2 screws.
The tightening torque of the 2 M5 screws is 3.0 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 fix the device housing to the machine frame
so that it cannot be removed by closing all fastening holes with the suitable protection
caps provided.
4.6 Mounting the actuator to the protective device
Attention: As required by EN ISO 14119, the actuator must be fixed immovably
to the door frame.
Always fix the actuator with 4 M5 screws with property
class 8.8 or higher, and flat 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 fixed with less than 4 screws. The
tightening torque of the 4 M5 screws is 3.0 Nm.
After the fixing 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 poten-
tial 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
Attention: Although the device
is designed to facilitate alignment
between the device and actuator,
excessive misalignment could dam-
age the device. Periodically check the
correct alignment between the safety
device and its actuator.
Maximum misalignment permitted
from the hole axis for rigid doors:
± 2.5 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 fitted 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.
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 mech-
anism 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.
70 max
For correct installation of the extensions, the following notes must be observed:
- Do not exceed an overall length of 70 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 escape release button, if necessary use an appro-
priate sliding guide (pipe or socket) when the button and its extensions exceed a
length of 50 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 qualified 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
- Turn the auxiliary release anticlockwise by 180° with the screwdriver.

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4.9.2 How to use the auxiliary release with lock
- 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 main-
tenance 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
Attention: The device is fitted 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 char-
acteristics of this particular type of outputs are known in detail.
1
2
3
456
7
8
9
10
11
12
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Connection
M12 con-
nector,
12-pin
M12 con-
nector,
8-pin
Stand-alone
connection
M12 con-
nector
8-pin
Series
connection
with Y-con-
nectors
Cable,
12-pin
Cable,
8-pin
Stand-alone
connection
A2 Power supply input
0 V 3 3 3 White Blue
IE1 Input for activation
of electromagnet 10 8 8 Violet Red
IE2 Input for activation
of electromagnet 12 5 / Red/blue Violet
O3 Signal output for
inserted actuator 5 2 / Pink Black
O4
Signal output for
inserted and locked
actuator
9 / 5 (b) Red /
I3 Actuator program-
ming input / reset 8 6 / Gray Purple/white
A1 Power supply input
+24 VDC 1 1 1 Brown Brown
IS1 Safety input 2 / 2 Blue /
IS2 Safety input 6 / 6 Yellow /
I5 EDM input (a) 11 / / Gray/pink /
OS1 Safety output 4 4 4 Green Red/white
OS2 Safety output 7 7 7 Black Black/white
(a) Only L250-P5xxx version available
(b) Available for 8-pin connector, not available for a chain with Y connectors.
4.11 RFID sensor switching points
The RFID sensor on the device recognizes the actuator when placed in front of it.
Within this field, the O3 signal output and the ACT LED are activated to signal the
"protective device closed" state. In this state, it is possible to obtain protective device
locking via the IE1 and IE2 inputs. After the locking operation, the LOCK LED and the
O4 output are activated; at the same time, the RFID sensor increases its releasing
distance, so as to ensure that no vibrations or impacts occurring with the protective
device locked may cause the OS1, OS2 and O4 outputs to open accidentally. If the IE1
and IE2 inputs are activated or deactivated, without the actuator being present, the
device does not carry out any locking and does not activate any of the OS1, OS2, or
O4 outputs. In order to open the protective device, IE1 and IE2 inputs must be used.
With the protective device unlocked, the O4 output will be deactivated and the LOCK
LED will be switched off. At this point, the RFID sensor will bring its intervention dis-
tance back to the initial values and, after the protective device has been opened, the
O3 output and the ACT LED will be deactivated.
5 OPERATION
5.1 Access monitoring
These safety devices alone are not sufficient to protect any operators or maintenance
engineers in the event of fully entering the danger zone, since any unintentional clos-
ing of a safety door behind them could allow the machine to be restarted. In case the
machine restarting control is entirely entrusted to these switches, a device must be
provided to avoid that risk, such as a lock-out/tag-out system which stops the machine
from being restarted.
5.2 Definitions
Device operating states:
• OFF: the device is off, not powered.
• POWER ON: status immediately following switching on, when the device carries
out internal tests.
• RUN: status in which the device works normally.
• ERROR: error status in which the safety outputs are deactivated. Indicates that a
fault is present inside or outside the device, such as:
- a short circuit or overload of safety outputs (OS1 and OS2),
- short circuit between a safety output and ground,
- short circuit between a safety output and the supply voltage,
- excessive misalignment between a safety device and a locked actuator,
- excess of maximum holding force with failure of the relating device in locked
condition,
- excess of maximum or minimum ambient temperature admitted,
- the maximum permissible voltage has been exceeded,
- internal error.
- The safety functions are defined as follows:
Mode 1: 1.1 The OS safety outputs must be deactivated when the actuator is
detected as unlocked.
1.2 The OS safety outputs must be deactivated when the actuator is
no longer detected.
1.3 The OS safety outputs must be deactivated when at least one
safety input (IS1 or IS2) is not active.
Mode 2: 2.1 The OS safety outputs must be deactivated when the actuator is
no longer detected.
2.2 The OS safety outputs must be deactivated when at least one
safety input (IS1 or IS2) is not active.
Mode 3: 3.1 The OS1 safety output must be deactivated when the actuator is
detected as unlocked.
3.2 The OS2 safety output must be deactivated when the actuator is
no longer detected.
3.3 The OS1 safety output must be deactivated when the IS1 safety
input is not active.
3.4 The OS2 safety output must be deactivated when the IS2 safety
input is not active.
In all operating modes, the device must keep the protective device closed and locked
when the electromagnet is active (ML operating principle in L250-PxML-xxx versions)
or inactive (SL operating principle in L250-PxSL-xxx versions) and the applied force is
lower than the declared FZh value.
• External Device Monitoring (EDM) is a function (available depending on the device
model) that allows the device to monitor the state of external contactors. Activation
and deactivation of external contactors must follow the state of the L250 safety
outputs within a maximum delay (see section TECHNICAL DATA).

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5.3 Operation description
Note: The following operation description refers to a device with safety outputs active
when the protection is closed and locked (mode 1).
A device with safety outputs activated by closing the protective device (mode 2) differs
from the above operating mode for the fact that the safety outputs OS1 and OS2 are
activated without the f4 function verifying the protective device locking.
Mode 3 differs, in that OS1 is activated when the protective device is closed and
locked, and OS2 with protective device closed.
After being correctly installed by following the present instructions, the safety device
can be supplied with power. The block diagram below shows 7 logical, linked sub-func-
tions of the safety device.
In the initial "POWER ON" status, function f0 of the safety device carries out an inter-
nal self-diagnosis which, if successfully completed, brings the device to the "RUN"
operating state. If the test is not passed due to an internal fault, the device enters the
"ERROR" status.
On EDM versions, at power on, the EDM signal is checked and it must be active within
a maximum delay time from device startup. If the EDM signal is not present after this
time span has elapsed, function f5 puts the device in the "ERROR" operating state. If
present, the EDM function must be used.
f4
f1
f2
f3 OS1
OS2
IS2
IS1
IN
O4
O3
OUT
CODE
ACT
LOCK
I5
EDM
f5
f6
IE1
IE2
f0
PWR
A2A1
The "RUN" operating state indicates nor-
mal operation: Function f1 evaluates the
state of the IS1 and IS2 inputs, while at the
same time function f2 checks that the actu-
ator is present, and function f4 checks that
the actuator has been locked.
In the EDM versions the f5 function verifies
the coherence of the EDM signal during
operating state changes and when the
safety outputs are off.When these three
conditions occur, function f3 of the device
activates the OS1 and OS2 safety outputs.
The IS1 and IS2 inputs of the device are
usually actuated simultaneously and there-
fore they are monitored, in terms of their
state and their coherence. The device
deactivates the safety outputs and signals
the state of non-coherent inputs by means
of IN LED green/orange flashing, in the
case where only one of the two inputs is
deactivated. In order to reactivate the safety outputs, both inputs have to be deacti-
vated and subsequently reactivated.
The f6 function verifies the coherence of the activation/deactivation signals for the
actuator lock command.
During the RUN state, function f0 cyclically carries out internal tests in order to detect
any faults. Any internal error being detected brings the device to the "ERROR" state
(PWR LED with red fixed light), which immediately deactivates the safety outputs.
The "ERROR" state can be reached even in the case of short circuits occurring
between the safety outputs (OS1 and OS2) or a short circuit of an output towards
earth or towards the power supply. Also in this case, function f3 deactivates the safety
outputs, and the error status is indicated by the OUT LED red flashing light.
The O3 signal output is activated during the "RUN" state when the actuator is inserted
in the device, regardless of the state of the IS1and IS2 inputs. The state of this output
is displayed by means of the ACT LED.
The O4 signal output is activated during the "RUN" state when the actuator has been
inserted and locked inside the device, regardless of the state of the IS1and IS2 inputs.
The state of this output is displayed by means of the LOCK LED.
The actuator lock or unlock command is transmitted to the device through the IE1
and IE2 inputs.
5.4 Actuator replacement
Attention: The machine manufacturer must restrict access to the sensor pro-
gramming mode to authorized personnel only.
The I3 input can be used, at all times, to replace the coded actuator with a second
actuator. By activating this input, the device gets ready for programming mode with the
IN LED orange light flashing, it deactivates all the OS1, OS2, O3 and O4 outputs and
then releases the actuator. Keep the input active while inserting the second actuator.
Acquisition of the second actuator is confirmed by the IN LED switching off and by
four flashes of the ACT LED. At this point, it is possible to deactivate the I3 input. The
device will automatically be brought to the restart state and the first actuator is no
longer detected.
The second actuator will have to be adequately fixed to the protective device as
explained in section MOUNTING INSTRUCTIONS.
This operation must not be carried out as a repair or maintenance operation. In the
case where the device stops working correctly, replace the entire device and not just
the actuator.
5.5 Reset input
The following error states due to a device external failure can be reset using the I3
input:
- a short circuit or overload of safety outputs (OS1 and OS2),
- short circuit between a safety output and the supply voltage,
- excessive misalignment between a safety device and a locked actuator.
5.6 Series connection with safety modules
It is possible to install several devices in cascade connection up to a maximum number
of 32 units, while maintaining safety category 4 / PL e according to EN ISO 13849-1
and SIL CL 3 integrity level according to EN 62061.
Check that the PFHdand MTTFdvalues of the system comprising the series connec-
tion of devices and the whole safety circuit meet the SIL/PL requirements prescribed
for the application.
Application example with single-channel
locking control function
Application example with two-channel lock-
ing control function
L250
L250
L250
MSI 400
OS1 OS2
IS1 IS2
IS1 IS2
OS1 OS2
IS1 IS2
OS1 OS2
Ixx Ixx Ox
IE1
IE2
AC-L250-xCA
AC-L250-xCA
AC-L250-xCA
+ Vcc
IE1
IE2
IE1
IE2
L250
L250
L250
OS1 OS2
IS1 IS2
IS1 IS2
OS1 OS2
IS1 IS2
OS1 OS2
OS1 OS2
AC-L250-xCA
AC-L250-xCA
AC-L250-xCA
+ Vcc
MSI 400
Ixx Ixx
IE1
IE2
IE1
IE2
IE1
IE2
Device in mode 1
Locking device detection function (protective
device interlocked): 2 channels / category 4 /
up to SIL 3 / PL e
Locking control function:
1 channel / category 2 / up to SIL 2 / PL d
Device in mode 1
Locking device detection function (protective
device interlocked): 2 channels / category 4 /
up to SIL 3 / PL e
Locking control function:
2 channels / category 4 / up to SIL 3 / PL e
Device in mode 2
Interlock detection function (protective device
closed): 2 channels / category 4 / up to SIL 3
/ PL e
Locking control function:
1 channel / category 2 / up to SIL 2 / PL d
Device in mode 2
Interlock detection function (protective device
closed): 2 channels / category 4 / up to SIL 3
/ PL e
Locking control function:
2 channels / category 4 / up to SIL 3 / PL e
When connecting the switches in series as described above, observe the following:
- Connect the inputs of the first device in the chain to the power supply.
- The OS1 and OS2 safety outputs of the last device in the chain must be connected
to the safety circuit of the machine.
- Where a safety module is used, check that the properties of OS1/OS2 safety out-
puts are compatible with the safety module inputs (see section INTERFACING).
- Observe the limits of the output cable stray capacitance, as specified in the electri-
cal data (see section TECHNICAL DATA).
- Check that the cascade response time fulfills the requirements of the safety func-
tion to be obtained.
- The chain response time must be calculated taking into account the response time
of each device.
- When using Y-cables for series connection, special attention must be paid to the
flowing currents, cable cross-sections and cable lengths in order to ensure that the
supply voltage of the components at the end of the series connection is within the
specified electrical limits of the L250 during operation.

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5.7 Operating states
PWR
LED
IN
LED OUT
LED
ACT
LED
LOCK
LED EDMaDevice
status Description
O O O O O O OFF Device switched off.
Green/
red,
alter-
nating
Green/
red,
alter-
nating
Green/
red,
alter-
nating
Green/
red,
alter-
nating
Green/
red,
alter-
nating
Green/
red,
alternat-
ing
POWER
ON
Internal tests at switching on.
Green O O Green RUN Safety inputs of the device
not active.
Green Green RUN Activation of safety inputs.
Green Green /
orange,
flashing
ORUN Noncoherent safety inputs.
Recommended action: check
input signal activation and/or
wiring of inputs.
Green Red,
flashing
RUN Noncoherent inputs IE1
and IE2 for electromagnet
activation.
Recommended action: check
input signal activation and/or
wiring of inputs.
Green Orange,
flashing
RUN Auxiliary release activated.
Deactivate the auxiliary
release to lock the actuator
Green Green RUN Actuator in safe area. O3
signal output active.
Green Green Green O RUN Actuator in safe area and
locked, O3 and O4 outputs
active.
Green Green Green Green Green O RUN Mode 1
Activation of IS1 and IS2
safety inputs. Actuator in
safe area and locked. O3,
O4, OS1 and OS2 outputs
active.
Green Green Green Green O RUN Mode 2
Activation of IS1 and IS2
safety inputs. Actuator in
safe area. O3, OS1, and
OS2 outputs active.
Green Orange Orange Green Green O RUN Mode 3.
Actuator present, protective
device closed and locked,
IS1 active, IS2 not active,
OS1 active, OS2 not active
Green Green Orange Green O O RUN Mode 3.
Actuator present, protec-
tive device closed and not
locked, IS1 and IS2 active,
OS1 not active, OS2 active
Green /
orange,
flashing
RUN Flashing fast (5 Hz): supply
voltage too high.
Flashing slow (1 Hz): tem-
perature at the limit of the
permitted range
Green Red,
flashing
ERROR Error on safety outputs.
Recommended action:
check for any short circuits
between the outputs, outputs
and ground or outputs and
power supply, then restart
the device.
Green O O Red,
flashing
O O ERROR Actuator detection error.
Check for physical integrity
of the device. In case of
damage, please replace the
entire device. If undamaged,
realign the actuator and
restart the device.
Red O O O O O ERROR Internal error. Recommended
action: restart the device. If
the fault persists, replace
the device.
Red,
flashing
O O O O O ERROR Temperature error: outside
the permissible range
Green O Green RUN EDM signal active (external
relay off)a
Green Green Green Green Green O RUN EDM signal not active (exter-
nal relay on)a
Green O O O O Red,
flashing
ERROR Error in EDM function a
O = off = indifferent (a) = only available with the L250-P5xxx version
5.8 Interfacing
Connection to the MSI-SR-LC21 safety module
Input configuration with monitored start
S33
S21 S22 S34 A2
S31
S12
A1
-
+
OS2
OS1
IS2
IS1
A1
+
A2
-
L250
MSI-SR-LC21
Connection to the MSI 400 safety module
The connections vary according to the program of the safety module
IxxIxx
OS2
OS1
IS2
IS1
A1
+
OS2
OS1
IS2
IS1
A1
+
Ixx
Ixx
A2
-
A2
-
L250 L250
MSI 400
EDM connection
.
OS2OS1I5
+
A2
-
L250-P5xxx
A1
-
KM1
KM2
-
Attention: if all OS safety
outputs are connected directly to
a safety contactor, we recommend
using fast-switching diodes con-
nected in parallel to the contactor
coils
6 INSTRUCTIONS FOR PROPER USE
6.1 Installation
Attention: The installation must exclusively be carried out by qualified personnel.
The OS1 and OS2 safety outputs of the device must be connected to the safety circuit
of the machine. The O3 and O4 signal outputs are not safety outputs and cannot be
used individually in a safety circuit to determine the "protection closed" state.
- Do not stress the device with bending and torsion.
- Do not modify the device for any reason whatsoever.
- Do not exceed the tightening torques specified in the present operating instructions.
- The device carries out a personnel protection function. Any inadequate installation
or tampering can cause people serious injuries and even death as well as property
damage and financial losses.
- These devices must not be bypassed, removed, turned or disabled in any other
way.
- If the machine where the device is installed is used for a purpose other than the
intended use, the device may not provide efficient personnel protection.
- The safety category of the system (according to EN ISO 13849-1), including the
safety device, also depends on the external devices connected to it and their type.
- Before installation, make sure the device is not damaged in any part.
- Before installation, ensure that the connection cables are not powered.
- Avoid excessive bending of connection cables in order to prevent any short circuits
or power failures.
- Do not paint or varnish the device.
- Do not drill the device.
- Do not use the device as a support or rest for other structures, such as cable ducts
or sliding guides.
- Before commissioning, make sure that the entire machine (or system) complies
with all applicable standards and EMC directive requirements.
- The device fitting surface must always be smooth and clean.
- Should the installer be unable to fully understand the documents, the product must
not be installed and the necessary assistance may be requested from the manu-
facturer (see section SUPPORT).
- Check for correct switching of the outputs and correct operation of the system
comprising the device and associated safety module before commissioning the
machine and in regular intervals.
- In proximity of the device do not carry out arc welding, plasma welding, or any other
process that may generate electromagnetic fields of intensity higher than the limits
prescribed by the standards, even when the device is off. Where welding operations

6
are to be carried out in the proximity of the previously installed device, it must first
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 inflammable 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 fixing 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 FZh.
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 fitted), 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 fulfilled, 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 qualified 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
depends on correct device operation;
b) Applications not contemplated in these operating instructions.
- Permanent application of maximum locking force FZh is not permitted.
- The machine manufacturer must take the shut down time into account for machines
with stopping time.

7
7 MARKING
The outside of the device is provided with external marking positioned in a visible
place. Marking includes:
- Producer trademark
- Part no.
- Batch number and production date. Example: A18 NS1-123456. The batch's first
letter refers to the month of manufacture (A=January, B=February, etc.). The second
and third digits indicate the production year (18 =2018, 19=2019, etc.).
8 TECHNICAL DATA
8.1 Housing
Housing made of glass fiber reinforced, self-extinguishing and shock-proof
technopolymer
Degree of protection: IP67 acc. to EN 60529
IP69K acc. to ISO 20653
(Protect the cables from direct high-pressure and high-temperature water jets)
8.2 General specifications
Locking with guard interlocking,
contact-free, coded: Type 4 according to EN ISO 14119
Encoding level acc. to EN ISO 14119: Low level with AC-L250-SCA actuator
High with AC-L250-UCA actuator
SIL* PL* Cat.*
PFHDMTTFD
Mode 1 / Mode 2
Interlock monitoring function (protec-
tive device closed)
3 e 4 1.22E-09 1840
Locking function (protective device
locked) - Not available in mode 2
3 e 4 1.23E-09 2657
Monitoring of the protective device
locking function
3 e 4 2.29E-10 2243
System (general) 3 e 4 1.24E-09 1671
Mode 3
Interlock monitoring function (protec-
tive device closed)
2 d 2 1.49E-09 3987
Locking function (protective device
locked)
2 d 2 1.50E-09 2627
Monitoring of the protective device
locking function
3 e 4 2.04E-10 2254
System (general) 2 d 2 1.82E-09 1677
(*) Values that can be achieved by the device. The final values of the safety application on the
machine always depend on the external devices, circuit and wiring.
DC: High
Mission time: 20 years
Ambient temperature: -20°C … +50°C
Storage temperature: -40°C … +75°C
Maximum operation altitude: 2000 m
Time for starting the switching operation: 2 s
Maximum actuation frequency with
actuator lock and release: 600 switching cycles/hours
Mechanical life expectancy: 1 million switching cycles
Max. actuation speed: 0.5 m/s
Min. actuation speed: 1 mm/s
Installation position: Any
Max. force before breakage F1max: 2100 N according to EN ISO 14119
Max. locking force FZh: 1615 N according to EN ISO 14119
Play of locked actuator: 4 mm
Extraction force of unlocked actuator: ~ 20 N
8.3 Electrical data
8.3.1 Electrical data of power supply
Nominal operating voltage Ue: 24 VDC ±10% SELV
Operating current at Uevoltage:
- minimum: 40 mA
- with electromagnet activated: Max. 0.4 A
- with electromagnet activated and
all outputs at maximum power: 1.2 A
Rated insulation voltage Ui: 32 VDC
Rated surge withstand voltage Uimp: 1.5 kV
External safeguarding: 2 A type gG or equivalent safeguarding
Overvoltage category: III
Electrical life expectancy: 1 million switching cycles
Electromagnet switch-on time: 100% ED
Max. electromagnet power consumption: 9 W
Degree of contamination: 3 according to EN 60947-1
8.3.2 Electrical data of IS1/IS2/I3/IE1/IE2/I5/EDM inputs
Nominal operating voltage Ue1: 24 VDC
Rated current consumption Ie1: 5 mA
8.3.3 Electrical data of OS1/OS2 safety outputs
Nominal operating voltage Ue2: 24 VDC
Output type: OSSD, PNP
Maximum current for output Ie2: 0.25 A
Minimum current for output Im2: 0.5 mA
Therm. nominal current Ith2: 0.25 A
Usage category: DC-13; Ue2=24 VDC, Ie2=0.25 A
Short-circuit detection: Yes
Overcurrent protection: Yes
Internal self-resetting protection fuse: 1.1 A
Time for deactivation pulses on
safety outputs: < 300 µs
Maximum permissible capacitance
between outputs: < 200 nF
Maximum permissible capacitance
between output and ground: < 200 nF
Response time for OS1 and OS2 safety
outputs on input deactivation: Typically 7 ms, maximum 15 ms
Response time upon release
of the actuator: Typically 7 ms, max. 12 ms
Response time upon removal
of the actuator: Typically 120 ms, max. 200 ms
Maximum delay for EDM input
signal state change: 500 ms
8.3.4 Electrical data of O3/O4 signal outputs
Nominal operating voltage Ue3: 24 VDC
Output type: PNP
Maximum current for output Ie3: 0.1 A
Usage category: DC-13; Ue3=24 VDC, Ie3=0.1 A
Short-circuit detection: No
Overvoltage protection Yes
Internal self-resetting protection fuse: 1.1 A
8.3.5 RFID sensor data
Assured operating distance Sao: 2 mm
Assured cut-out distance Sar: 6 mm (actuator not locked)
10 mm (actuator locked)
Nominal switching distance Sn: 3 mm
Repeatability: ≤10% Sn
Differential travel: ≤20 % Sn
Maximum switching frequency: 1 Hz
Min. distance between 2 identical devices
to avoid reciprocal radio interferences: 0 mm
8.4 Conformity with standards
EN ISO 14119:2013, EN 60947-5-3:2013, EN 60947-1, EN 60204-1, EN ISO 12100,
EN 60529, EN 61000-6-2, EN 61000-6-3, BG-GS-ET-19, IEC 61508:2010, SN 29500,
EN ISO 13849-1:2015, EN ISO 13849-2:2012, EN 62061:2005 + A2:2015, EN 61326-1,
EN 61326-3-1, EN 61326-3-2, ETSI 301 489-1, ETSI 301 489-3, ETSI 300 330-2,
UL 508, CSA 22.2 No.14
8.5 Conformity with directives
Machinery Directive 2006/42/EC, EMC Directive 2014/30/EU, Radio Equipment Direc-
tive 2014/53/EU, RoHS Directive 2011/65/EU
Statements acc. to FCC Part 15: This device complies with part 15 of the FCC Rules. Operation
is subject to the following two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may cause undesired
operation.
9 SPECIAL VERSIONS ON REQUEST
Special versions of the device are available on request.
The special versions may differ substantially from the descriptions in these operating
instructions.
The installer must ensure that he has received written information from the support
service regarding installation and use of the special version requested.
10 DISPOSAL
At the end of its mission time, the device must be disposed of properly, according to
the rules in force in the country in which the disposal takes place.
11 SUPPORT
The device can be used for personnel protection. For questions or doubts concerning
installation or use, always contact our technical customer service under the following
contact address:
24-hour on-call service at: [phone]
Service hotline: [phone]
E-mail: [email protected]
Return address for repairs:
Service center
Leuze electronic GmbH + Co. KG
In der Braike 1
D-73277 Owen / Germany
12 EC CONFORMITY DECLARATION
Leuze electronic GmbH + Co. KG
In der Braike 1, D-73277 Owen/Germany
The safety sensors of the L300 series have been developed and manufactured in
accordance with the applicable European standards and directives.
The manufacturer of the product, Leuze electronic GmbH + Co. KG in D-73277 Owen,
possesses a certified quality assurance system in accordance with ISO 9001.
© 2019 Copyright Leuze electronic. All rights reserved.