Rockwell Automation Allen-Bradley Guardmaster GuardShield Remote Teach, Руководство по установке

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Rockwell Automation Publication 440L-IN012A-EN-P - November 2017 13
GuardShield Type 4 and GuardShield Remote Teach
Three Segment GuardShield Light Curtain Cascading Systems
When the use of corner mirrors is not practical or possible, three-sided
guarding of a machine hazard is possible using cascade GuardShield
light curtains.
Figure 20 - Top and Bottom Mounting of Three GuardShield light
curtain Segments
(U-shape Setup)
Top and bottom mounting of three GuardShield light curtain segments
is possible. This configuration provides three-sided machine guarding
without the use of corner mirrors.
Mounting and Alignment of Cascading GuardShield Light Curtain
Multiple GuardShield Light Curtains
When two or more GuardShield light curtains are mounted close to one
another, it is possible for the receiver of one pair to receive infrared light
from the transmitter of another pair. The GuardShield light curtain
feature of beam coding overcomes this optical interference. Beam
coding changes the pulse pattern of infrared light that a GuardShield
light curtain transmitter emits.
Figure 21 - Multiple GuardShield Light Curtain Alignment Options
Mounting Brackets
By default, the GuardShield light curtain is mounted using right angle
brackets ( Figure 22 ) that are attached to the endcaps of both transmitter
and receiver. It can be necessary to use additional brackets (see
Figure 23 ) to mount the GuardShield light curtain at a proper safety
distance from the machinery hazard. For applications with shock and/or
vibrations, also see Table 66 .
Figure 22 - Mounting Brackets (AF-6101)
IMPORTANT It is necessary to align cascade segments in a particular order.
Begin by aligning the last segment in the system. Once the
last receiver status indicator is green; secure mounting
brackets of that pair. Next align the middle segment pair.
When the middle-segment receiver status indicator is green,
secure those brackets. Finally align the host segment. When
that receiver status indicator is green, secure those brackets.
Test system by interrupting sensing field of last segment and
verify that all receiver OSSD status indicators are red.
Next interrupt the sensing field of the middle segment pair (if
any) and confirm that the middle segment and host segment
receiver OSSD status indicators are red. The last segment-pair
receiver status indicator remains green. Finally, interrupt the
sensing field of the host segment receiver and confirm that
the receiver OSSD status indicators are red (middle and end
segment pairs indicate green).
Horizontally adjacent: Transmitters emit in
opposite direction. Each receiver receives
only the beams of the appropriate
transmitter.
Transmitters emit in same direction:
Coding necessary
Vertically adjacent: Positioning of the light
curtain: Transmitters emit in opposite
direction.
52 (2.05)
42
(1.65)
3
(0.12)
20 (0.79)
6.5 (0.26)
18.9
(0.74)
14.5
(0.57)
40 (1.57)
33.34
(1.31) Ø
BC
31.75
(1.25)
22.15
(0.87) Ø