Rockwell Automation 440L GuardShield Type 4 and Remote Teach User Manual - Manual (Page 16)

GuardShield™ Safety Light Curtain User Manual
14
R
Original instructions
Figure 7: Top and bottom mounting of three GuardShield segments is possible, which will
provide three-sided machine guarding without the use of corner mirrors
Mounting and Alignment of Cascading
GuardShield
Multiple GuardShields
When two or more GuardShields are mounted in close proximity to
one another, it may be possible for the receiver of one GuardShield
pair to receive infrared light from the transmitter of another
GuardShield pair. This optical interference can be over come by the
GuardShield feature of Beam Coding. Beam coding changes the pulse
pattern of infrared light emitted by a GuardShield transmitter.
Figure 8: Multiple GuardShield alignment options
Mounting Brackets
The GuardShield is mounted using right angle brackets attached to the
endcaps of both transmitter and receiver. It may be necessary to use
additional brackets to mount the GuardShield at a proper safety
distance from the machinery hazard.
Figure 9: Mounting brackets
It is necessary to align cascading segments in a
particular order.
Begin by aligning the last segment in the
system, once the last receiver LED is green;
secure mounting brackets of that pair. Next
align middle segment pair, when middle
segment receiver LED is green secure those
brackets. Finally align the host segment, when
that receiver’s LED is green, secure those
brackets.
Test system by interrupting sensing field of last
segment and verify that all receiver OSSD LEDs
are red.
Next interrupt the sensing field of middle
segment pair if any and confirm that middle
segment and host segment receiver OSSD LEDs
are red (the last segment pair receiver’s LED
should remain green). Finally, interrupt the
sensing field of the host segment receiver and
confirm that the receiver OSSD LEDs are red
(middle and end segment pairs will indicate
green).
IMPORTANT
Transmitters emit in opposite direction.
Each receiver receives only the beams of the
appropriate transmitter.
Transmitters emit in same direction:
➡Coding necessary
Positioning of the light curtain:
Transmitters emit in opposite direction.
Noncoded Coded
42
(1.65)
20
(0.79)
40 (1.57)
18.9
(0.74)
14.5
(0.57)
52 (2.04)
3.0
(0.11)
32
(1.25)
6.5 (0.26)