Rockwell Automation 445L GuardShield Safe 4 and Safe 4 PAC Safety Light Curtains User Manual - Manual (Page 11)

R
GuardShield™ Safe 4 Safety Light Curtain User Manual
9
Original instructions
stopped anywhere in its stroke or cycle, consistently and
repeatedly.
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.
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.
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.
Figure 7: Adjustment with ILAS
Correct Installation
Transmitter
Receiver
Transmitter
Receiver
Incorrect
Correct
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
6 m
9 m
18 m
30 m R = 7 mm
R = 20 mm
R = 30 mm
R = 60 mm
R = 99 mm D = 7 mm
D = 21 mm
D = 32 mm
D = 63 mm
D = 105 mm
R
D

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).