Incorrect Installation; Mounting Brackets - Allen-Bradley GuardShield 440L-T2KA series Installation Instructions Manual

GuardShield Type 2 Safety Light Curtain

Incorrect Installation

Operators can reach hazardous machine
parts without passing through the
protective field.
Operators can step between protective
field and hazardous machine parts.
The GuardShield™ Type 2 must be mounted at the proper distance
from the point of operation hazard. This distance is referred to as the
Safety Distance.
Middle of Depth of Protective Field
Safety Distance
Protective Field Marking
Determining machine stopping time and safety distance
Multiple GuardShield™ Type 2
When two or more GuardShield™ Type 2 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 transmitter and receiver
pairs must be mounted in accordance with the following figure or a
barrier is used to guard against optical interference.
8
Point of Operation
Top of tool
Machine stop time
Bottom of tool
To avoid the possibility of standing between
the protective field and the point of
operation, the distance must be maintained.
Rockwell Automation Publication 440L-IN011B-EN-P - October 2017
Multiple GuardShield™ Type 2 alignment options

Mounting Brackets

The GuardShield™ Type 2 is mounted using right angle brackets that
are attached to the endcaps of both transmitter and receiver. It is
necessary to use additional brackets to mount the GuardShield™ Type 2
at a proper safety distance from the machinery hazard.
20
(0.79)
42
(1.65) 20
(0.79)
14.5
40 (1.57)
(1.57)
3 (0.12)
32
(1.25)
Mounting brackets
Optional Middle Mounting Bracket (440L-AF6108)
49.2 (1.94)
62
(2.44)
40.2
(1.58)
24
(0.94)
Middle mounting brackets
Note: Middle mounting brackets are used in vibration applications
for protective heights of 1120 mm (44.09 in.) and larger.
Transmitters emit in opposite
direction. Each receiver receives
only the beams of the
appropriate transmitter.
Position of the light curtain:
Transmitters emit in opposite
direction.
52 (2.04)
30 (1.18)
20
(0.79)