4
EN
SLG 425I
Operating instructions
Safety light grid
2.8.4 Beam coding
The beam coding of the safety light grid must be adjusted, when
systems operating in each other's vicinity and a set-up as shown in the
image below (no interference) is impossible. When supplied, the beam
coding is not active. With beam coding A, a receiver can distinguish the
beams of the transmitter with the same beam coding A, which are des-
tined to this particular receiver, from foreign beams. The beam coding A
must be set for each sensor (receiver and transmitter) individually. The
function is activated by means of the NSR-0801 BUS converter and a
PC or laptop.
If adjacent systems are operated without beam coding, the user is at risk.
no interference
E
E
R
R
Interference: beam coding required!
E
R
R
E
• The beam coding increases the safety and avoids mutual interference
of adjacent systems.
• The beam coding increases the immunity against optical interference
(e.g. sun light, welding sparks).
• The beam coding A is permanently shown by the transmitter and the
receiver by means of flashing LED's (refer to LED status information).
On adjacent systems, the beam coding A must be used.
The response time of the system is increased when beam
coding A is used. To this end, the safety distance must be
adjusted to the hazardous movement. Refer to chapter
Response time.
2.8.5 Fixed blanking
The SLC 425I can blank stationary parts in the protection field.
The fixed blanking range is authorised for individual beams in case of
obstacles, taking the protective function into account.
Fixed blanking area
4
3
2
1
R1
E1
Access to lateral areas must be prevented by means of
mechanical covers!
The first beam line, which realises the optical synchronisation and is
located immediately behind the diagnostic window, cannot be blanked.
The area of the fixed blanking must not be modified after the teach-in
process. Any change of the area or removal of the part from the protec-
tion field will be detected by the system. As a result, the outputs are
disabled (locked). This locking can be neutralised by executing a new
teach-in process in accordance with the actual beam interruptions.
• The blanking of beams is not authorised for an SLG 425I
with 2 beams!
• The blanking of one beam at the most in the SLG 425I
3-beam version or the SLG 425I 4-beam version is au-
thorised, provided that the protective function is taken into
account.
• The blanking of multiple beams is not authorised.
• The remaining lateral areas must be protected against intru-
sion by means of mechanical covers.
• The lateral covers must be fixed with the object. Partial cov-
ers are not authorised.
• The restart interlock (manual reset) function of the safety
light grid or the machine must be activated.
The function is activated by means of the NSR-0801 BUS
converter and a PC or laptop. The activation of the function
is signaled by the blanking LED flashing in the diagnostic
window of the receiver.
2.8.6 Testing
The system performs a complete self-test and safety test within 2 sec-
onds after the operating voltage has been switched on. If the protection
field is not interrupted, the system switches to the ON condition.
In case of an error, the outputs at the receiver do not switch to the ON
state. The LED OSSD OFF starts flashing, thus emitting an error mes-
sage. Further indications can be found in the chapter Fault diagnostic.
During operation, the system continuously executes a self-test. Safety-
relevant faults are detected within the cycle time and cause the outputs
to be switched off.
2.9 Operating mode muting
2.9.1 Adequate and appropriate application
The objective of the by-pass function is the safe distinction between
material and the presence of a person in front of the hazardous area. To
this effect, (2 or 4) additional sensors must be connected to provide for
a safe distinction between persons and the material to be transported.
To activate and parameterise the muting function, the
NSR-0801 BUS converter and the SLC4 PC software is
required.
Special mounting instructions for muting
All components must only be connected, wired and fitted by a special-
ist, who has sufficient electrical professional training and knowledge of
the harmonised safety regulations.
Testing and start-up by a qualified person, who has professional knowl-
edge as well as in particular knowledge of the harmonised legal and
governmental regulations.
Instruction and training of the operators by an expert on the application.
