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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 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 char-
acteristics of this particular type of outputs are known in detail.
10
1
9
8
12
2
7
3
6
4
5
11
M12 con-
Connection
nector,
12-pin
Power supply input
A2
3
0 V
Input for activation
IE1
10
of electromagnet
Input for activation
IE2
12
of electromagnet
Signal output for
O3
5
inserted actuator
Signal output for
O4
inserted and locked
9
actuator
Actuator program-
I3
8
ming input / reset
Power supply input
A1
1
+24 VDC
IS1
Safety input
2
IS2
Safety input
6
I5
EDM input (a)
11
OS1
Safety output
4
OS2
Safety output
7
(a) Only L250-P5xxx version available
(b) Available for 8-pin connector, not available for a chain with Y connectors.
1
1
7
7
2
6
2
6
3
5
3
5
4
4
8
8
M12 con-
M12 con-
nector
nector,
8-pin
Cable,
8-pin
Series
12-pin
Stand-alone
connection
connection
with Y-con-
nectors
3
3
White
8
8
Violet
5
/
Red/blue
2
/
Pink
/
5 (b)
Red
6
/
Gray
1
1
Brown
/
2
Blue
/
6
Yellow
/
/
Gray/pink
4
4
Green
7
7
Black
4.11 RFID sensor switching points
The RFID sensor on the device recognizes the actuator when placed in front of it.
Within this fi eld, 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 suffi cient to protect any operators or maintenance
engineers in the event of fully entering the danger zone, since any unintentional clos-
Cable,
ing of a safety door behind them could allow the machine to be restarted. In case the
8-pin
machine restarting control is entirely entrusted to these switches, a device must be
Stand-alone
connection
provided to avoid that risk, such as a lock-out/tag-out system which stops the machine
from being restarted.
5.2 Defi nitions
Blue
Device operating states:
Red
• OFF: the device is off, not powered.
• POWER ON: status immediately following switching on, when the device carries
Violet
out internal tests.
Black
• 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),
Purple/white
- short circuit between a safety output and ground,
- short circuit between a safety output and the supply voltage,
Brown
- 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,
Red/white
- internal error.
Black/white
- The safety functions are defi ned 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 F
• 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).
3
value.
Zh
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