Rockwell Automation 440L GuardShield Type 2 Safety Light Curtain User Manual - Manual (Page 10)

GuardShield™ Type 2 Safety Light Curtain Installation Instructions
8
R
Original instructions
The effective aperture angle for the GuardShield Type 2 system is within
±5.0° at a mounting distance of > 3.0 m (9.8 ft). Calculate the minimum
distance to reflecting surfaces depending on the distance between the
transmitter and the receiver, using an aperture angle of ±5.0°, or take the
appropriate value from the following table:
Note: Formula: a = tan 2.5° x D [mm]
a = minimum distance to reflecting surfaces
D = distance between transmitter and receiver
Installation and Mounting
This section describes the preparation, selection and installation of the
GuardShield Type 2 safety light curtain.
The standard GuardShield Type 2 has an amber LED in the receiver
which is used as an alignment aid. This LED will begin flashing when the
infrared light from the transmitter is “seen” by the receiver. This LED
turns off when optimal alignment is attained.
Alignment Procedure: Standard GuardShield Type 2
Mount and connect both transmitter and receiver. They must be parallel
to each other and be positioned at the same height.
Turn on power to GuardShield Type 2 system.
Rotate the transmitter while watching the amber LED on the receiver to
find the point where the indicator for the ON state (Green LED)
illuminates and the amber LED goes off.
Determine the maximum left and right turning angles and position unit
in center. Tighten all hardware assuring that the alignment indicator is
not illuminated.
Cycle power to assure that the system powers up and goes to the ON
state (alignment indicator is OFF).
An external laser (440L-ALAT) and mounting bracket (440L­AF6109)
is offered as an accessory for aligning the GuardShield Type 2.
The GuardShield Type 2 safety light curtain is suitable for most
operating environments (IP65 environmental rating). Proper safety
distance as well as adequate protective height must be observed.
Determine if the machinery, on which the GuardShield Type 2 is to be
mounted, meets the requirements as specified in the beginning of this
manual, i.e., machinery must be able to be stopped anywhere in its stroke
or cycle, consistently and repeatedly.
Correct Installation
Incorrect Installation
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.
Distance Between Transmitter and Receiver
(Range X) D [m (ft)]
Minimum Distance
a [mm (in.)]
0.2…3.0 (0.65…9.8) 263 (10.4)
4.0 (13.1) 350 (13.8)
5.0 (16.4) 437 (17.2)
6.0 (19.6) 525 (20.7)
7.0 (22.9) 613 (24.1)
10.0 (32.8) 875 (34.5)
16.0 (52.4) 1400 (55.1)
18.0 (59.1) 1575 (62.0)
The installation of the GuardShield Type 2
safety light curtain must be such that access
to the hazard is only possible through the
sensing field of the GuardShield Type 2.
Auxiliary safe guarding may be required in
conjunction with the GuardShield Type 2 to
meet this requirement.
IMPORTANT
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).
Operators can reach hazardous machine
parts without passing through the
protective field.
Operators can step between protective
field and hazardous machine parts.