Rockwell Automation 445L GuardShield Safe 2 and Safe 2 PAC Safety Light Curtains User Manual - Manual (Page 10)

R
GuardShield™ Safe 2 Safety Light Curtain User Manual
8
Original instructions
Figure 4: Minimum distance from reflecting surfaces
How to Determine the Minimum Distance from the Reflecting Surfaces:
• Determine the distance D [m] sender-receiver
• Read the minimum distance a [mm] from the graph:
Figure 5: Graph, minimum distance from reflecting surfaces
The effective aperture angle for the GuardShield Safe 2 system is
±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:
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 Safe 2 safety light curtain. Mount and connect both
transmitter and receiver.
Determine if the machinery, on which the GuardShield Safe 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.
Alignment Procedure
GuardShield Safe 2
The GuardShield Safe 2 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 2 transmitter and in the top of the
GuardShield Safe 2 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.
Cycle power to assure that the system powers up and goes to the ON
state.
1. Properly locate the GuardShield Safe 2 pair from the point of
operation hazard after performing the safety distance calculation.
2. Using the GuardShield Safe 2 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 2 system.
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)
Distance D (meters)
1600
1500
5 15 20 3 10
a (mm)
800
100
900
300
1000
200
1100
400
1200
500
1300
600
1400
700
D (m)
IMPORTANT
The installation of the GuardShield Safe 2
safety light curtain must be such that access
to the hazard is only possible through the
sensing field of the GuardShield Safe 2.
Auxiliary safe guarding may be required in
conjunction with the GuardShield Safe 2 to
meet this requirement.