4.1 Installation requirements
4.1.1 Detection zone and approach
The protective field of the SLG 422/ 425I-P is 500 mm. The output and input of the beam is shown in the dimensioned
drawing. Install additional protective structures to make sure that the detection zone must be passed in order to
reach dangerous machine parts.
Install SLG 422/ 425I-P in a way that users operating dangerous machine parts will always remain within the detection
zone of the safety device.
4.1.2 Alignment of transmitter and receiver
Procedure:
1. The transreceiver must be arranged parallel to the reflection mirror and on the same height.
2. Turn the transreceiver, watching the diagnosis window of the transreceiver and fix the point, when the OSSD
ON LED (green) flashes up and the LED Signal reception (orange) goes out.
3. Determine the max. left and right torsion angle and fix the fastening screws in center position.
Check that the Signal reception LED does not flash.
4.1.3 Safety distance determination
Safeguarding of access areas with SLG 422/ 425I-P
S = Safety distance
mechanical protection
The safety distance is the minimum distance between SLG 422/ 425I-P and dangerous machine parts that has to
be kept to prevent access to the danger spot before the dangerous movement has stopped.
The following equations and calculation examples refer to vertical adjustment of the safety light-curtain
to the danger spot.
Calculation of the safety distance according to EN 999 and EN 294
The following factors are decisive when determining the safety distance:
- Machine after-running time (determined by measuring the after-running time)
- Response time of machine and safety light grid (entire protective gear)
- Approach speed
- Resolution of the safety light grid
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Subject to technical changes
can be within the danger area before a dangerous movement is starting.
The respective beam position is marked by a countersink (D = 2 mm), directly at beam withdrawal, laterally
on the profile.
4 Mounting
For the operation the legal and official regulations have to be considered.
These can be different according to region and country.
! Attention
dangerous area is not possible. The dangerous area must be freely observable for the user when the control unit
The control unit (release button) has to be mounted outside the dangerous area that an operation from within the
(release button) is operated.
The safety distance from the danger place to the protection device SLG 422/ 425I-P has to be kept absolutely.
The safety distance allows persons to stay within the dangerous area. It must be guaranteed that no person
Safety light grid SLG 422/ 425I-P
danger spot
Direction of access
to the danger zone
Command button
Release
S
Mirror
SLG
