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Alignment Procedure
Standard GuardShield Safe 4
The GuardShield Safe 4 is offered with an integrated laser alignment
system which has a constantly powered Class 2, eye safe laser located in
the bottom of the GuardShield Safe 4 transmitter and in the top of the
GuardShield Safe 4 receiver. Each laser emits a low level of visible light.
Simply blocking this light below the finger symbol causes the light to be
reflected back to a photo sensor which changes the condition of the laser
light. If this light is at a low level, interrupting it will cause the laser to
emit a highly visible level of light. Interrupting the visible light in the
same location will cause the laser to switch to a low level of emission. The
emission of visible light will also change to a low level after five minutes
of activation.
GuardShield Safe 4 with Integrated Laser Alignment
Cycle power to assure that the system powers up and goes to the ON
state.
1. Properly locate the GuardShield Safe 4 pair from the point of
operation hazard after performing the safety distance calculation.
2. Using the GuardShield Safe 4 mounting brackets, mount the
transmitter and receiver so that they are facing one another and are
positioned in the same direction. A reference would be that the
indicator LEDs are opposite one another. They must be parallel to
each other and be positioned at the same height. Turn on power to
GuardShield Safe 4 system.
Incorrect
Correct
Figure 6: Layout of the transmitter/receiver
3. Turn on each laser by placing a finger or hand in front of each laser
(close to the finger symbol
4. For optimal alignment, adjust the transmitter and receiver in such a
way that both visible laser beams hit the laser targets opposite each
laser. A small deviation around the target is allowable and are harmless
as long as they are within the aperture angle.
5. Tighten all screws firmly.
6. Switch the ILAS off when aligned.
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Original instructions
GuardShield™ Safe 4 Safety Light Curtain User Manual
When mounting Perimeter Systems adjust the heights according to the
recommendations in the local standards and regulations (Europe: EN
ISO 13855 [2010]) (see Figure 2).
The GuardShield Safe 4 safety light curtain is suitable for most operating
environments (IP65 environmental rating). Proper safety distance as well
as adequate protective height must be observed.
Remarks to ILAS
Due to dimensional tolerances the visible ILAS laser beam may be
located "off center" from the target when the light curtain is aligned
optimally in the center of the operating range. The optimal operating
point can be found after alignment with ILAS when moving the axis in
X- (left, right) and Z- (up, down) direction. The optimal operating point
is in the middle of the two end points, where the receiver output switches
from active to inactive condition.
On optimal alignment of the light
curtain, the ILAS light point can deflect
from the ILAS target point. The
maximum deflection adds up to the
following value due to the operating
distance:
2 m
R = 7 mm
D = 7 mm
6 m
R = 20 mm
D = 21 mm
9 m
R = 30 mm
D = 32 mm
18 m
R = 60 mm
D = 63 mm
30 m
R = 99 mm
D = 105 mm
Figure 7: Adjustment with ILAS
Correct Installation
Operators cannot reach hazardous
machine parts without passing through
the protective field.
Operators must not step between
protective field and hazardous machine
parts (by-pass prevention).
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