12
EN
SLC 420 IP 69 K
Operating instructions
Safety light curtain
5.1 Check before start-up
Prior to start-up, the following items must be checked by the responsi-
ble person
Wiring check prior to start-up
1 The voltage supply is a 24V direct current power supply, which meets
the CE Directives, Low Voltage Directives A power downtime of 20
ms must be bridged
2 Presence of a voltage supply with correct polarity at the SLC
3 The connecting cable of the transmitter is correctly connected to the
transmitter and the connecting cable of the receiver correctly to the
receiver
4 The double insulation between the light curtain output and an exter-
nal potential is guaranteed
5 The outputs OSSD1 and OSSD2 are not connected to +24 VDC
6 The connected switching elements (load) are not connected to +24
VDC
7 If two or more SLC are used within close range compared to each
other, an alternating arrangement must be observed Any mutual
interference of the systems must be prevented (see chapter "Beam
coding")
Switch the SLC on and check the operation in the following way:
The component performs a system test during approx 2 seconds after
the operating voltage has been switched on After that, the outputs are
enabled if the protection field is not interrupted The LED "OSSD ON" of
the receiver is on
In case of incorrect functionality, please follow the instructions
listed in the chapter Fault diagnostic
5.2 Maintenance
Do not use the SLC before the next inspection is terminated
An incorrect inspection can lead to serious and mortal inju-
ries
Conditions
For safety reasons, all inspection results must be archived The operat-
ing principle of the SLC and the machine must be known in order to
be able to conduct an inspection If the fitter, the planning technician
and the operator are different persons, please make sure that the user
has the necessary information at his disposal to be able conduct the
maintenance
5.3 Regular check
A regular visual inspection and functional test, including the following
steps, is recommended:
1 The component does not have any visible damages
2 The optics cover is not scratched or soiled
3 Hazardous machinery parts can only be accessed by passing
through the protection field of the SLC
4 The staff remains within the detection area, when works are con-
ducted on hazardous machinery parts
5 The safety distance of the application exceeds the mathematically
calculated one
Operate the machine and check whether the hazardous movement
stops under the hereafter-mentioned circumstances.
6 Hazardous machine parts do not move when the protection field is
interrupted
7 The hazardous machine movement is immediately stopped, when
the protection field is interrupted with the test rod immediately before
the transmitter, immediately before the receiver and in the middle
between the transmitter and the receiver
8 No hazardous machine movement when the test rod is within the
protection field
9 The hazardous machine movement comes to standstill, when the
voltage supply of the SLC is switched off
5.4 Half-yearly inspection
The following items must be checked every six months or when a ma-
chine setting is changed
1 Machine stops or does not inhibit any safety function
2 No machine modification or connection change, which affects the
safety system, has taken place
3 The outputs of the SLC are correctly connected to the machine
4 The total response time of the machine does not exceed the re-
sponse time calculated during the first putting into operation
5 The cables, the connectors, the caps and the mounting angles are in
perfect condition
5.5 Cleaning
If the optics cover of the sensors is extremely soiled, the OSSD outputs
can be disabled Clean with a clean, soft cloth with exercising pressure
The use of agressive, abrasive or scratching cleaning agents, which
could attack the surface, is prohibited
6. Diagnostic
6.1 LED status information
Receiver
Function
LED colour
Description
Multifunction
Blanking
Signal recep-
tion
Restart
OSSD OFF
OSSD ON
Protection field
Multifunction
green
Function display, Beam coding
Blanking
blue
Protection field(s) inactive (blanking)
Signal reception
orange
Safety-monitoring module of Signal reception
Restart
yellow
Input for command device
OSSD OFF
red
Safety outputs Signal condition OFF
OSSD ON
green
Safety outputs Signal condition ON
Transmitter
Function
LED colour
Description
Transmitting
Status
Protection field
Transmitting
orange
Transmitter active
Status
green
Function display, Beam coding
