10
EN
SLG 425I
Operating instructions
Safety light grid
Muting with 4 sensors, parallel arrangement
The arrangement shows the muting application with four parallel ar-
ranged muting sensors. This arrangement enables the material to be
transported in both directions.
MS1 MS2
MS3 MS4
S
E
S3
S2
S1
S1
S2
Carrier
Belt
Material
S1
= distance of the inner MS to SF
S2
= distance between two MS
S3
= material length
MS 1
= Muting sensor 1
MS 2
= Muting sensor 2
MS 3
= Muting sensor 3
MS 4
= Muting sensor 4
S
= Transmitter
E
= Receiver
VB
= belt speed (m/s)
SF
= Protection field
S3 > 2(S1 + S2)
S1 = belt speed VB (m/s) x 0,05 s
The muting cycle is as follows:
MS1 - MS2 - SF - MS3 end
MS4 - MS3 - SF - MS2 end
Selectable options: belt stop, reduced muting cycle, override, protection
field area
Factory setting: material transport in both directions
The muting figure with each time 2 muting sensors shows a symmetri-
cal arrangement before and after the protection field of the SLG 425I.
3. Mounting
3.1 General conditions
The following guidelines are provided as preventive warning notices
to ensure a safe and appropriate handling. These guidelines are an
essential part of the safety instructions and therefore must always be
observed and respected.
• The SLG must not be used on machines, which can be
stopped electrically in case of emergency.
• The safety distance between the SLG and a hazardous ma-
chine movement must always be observed and respected.
• Additional mechanical safety guards must be installed so that
the operator has to pass by the protection field to reach the
hazardous machine parts.
• The SLG must be installed so that the personnel always
must be within the detection zone when operating the ma-
chine. An incorrect installation can lead to serious injuries.
• Never connect the outputs to +24VDC. If the outputs are
wired to +24VDC, they are in ON state, as a result of which
they are unable to stop a hazardous situation occuring on the
application/machine.
• The safety inspections must be conducted regularly.
• The SLG must not be exposed to inflammable or explosive
gasses.
• The connecting cables must be connected in accordance
with the installation instructions.
• The fixing screws of the end caps and the mounting angle
must be firmly tightened.
• Additional measures could be required to ensure that the
electro-sensitive device does not present a dangerous
breakdown, when other forms of light beams are available in
a special application (e.g. use of wireless control devices on
cranes, radiation of welding sparks or effects of stroboscopic
lights).
3.2 Protection field and approach
The protection field consists only of the available individual beams with
a distance of 300, 400 or 500 mm. Additional protective devices must
ensure that hazardous machine movements can only be reached after
passing through the protection field.
The SLG must be installed to so that the hazardous area is completely
protected, if necessary by means of additional safety guards.
The safety distance before the hazardous point to the SLG safety
guard must be imperatively respected. The safety distance enables the
presence of persons within the hazardous area. Therefore, it must be
ensured that the hazardous movement can only take place, when no
persons are inside the hazardous area anymore. The legal and govern-
mental provisions must be observed for the operation and use. These
provisions are usually region- and country-dependent.
The command devices (enabling button) must be installed
outside of the hazardous area sot hat any operation from
within the hazardous area is prevented. The operator must
have a clear view on the hazardous area, when actuating the
command device (enabling button).
3.3 Alignment
Procedure:
1. The transmitter and the receiver must be fitted parallel to each other
and at the same height.
2. Turn the transmitter and monitor the diagnostic window of the re-
ceiver. Fix the light grid, when the LED OSSD ON (green) is on and
the LED signal reception (orange) is off.
3. Determine the max. rotating angle to the left and to the right, at which
the LED OSSD ON (green) is on and tighten the mounting screws in
central position. Make sure that the LED signal reception (orange) is
not on or flashing.