Allen-Bradley 442L-SFZNMN, User Manual

Page: 43 / 108

Rockwell Automation Publication 442L-UM005B-EN-P - April 2017 43
Mounting Chapter 4
Figure 16 - Mounting Variations for the Scan Plane [mm (in.)]
In summary, there are three usual variations of mounting the scan plane for the
SafeZone Mini device. The optimal variation depends on the related
application. Table 8 helps make the selection.
Table 8 - Advantages and Disadvantages of Mounting Variations [mm (in.)]
Calculate the Supplement C
• If there is enough empty space in front of your machine or system, use
1200 mm (47.2 in.) for the supplement C.
• If the minimum distance is to be kept as small as possible, calculate C
with the following formula:
C = 1200 mm – (0.4 × H
D
)
Here H
D
is the height at which the protective field is mounted.
1 2 3
C = 1200 (47.2) C = 850 (33.5) C = 850 (33.5)
h
s
h
D
= 0
h
s
h
D
= 875 (34.4)
h
s
h
D
= 875 (34.4)
1
Mounting Orientation
(1)
(1) H
D
= detection height; H
S
= scanner mounting height.
Advantage Disadvantage
Safety laser scanner low (H
S
< 300
(11.81 in.))
Low inclination of the scan plane
(H
D
≈ H
S
)
Low external effects due to ambient
light interference, crawling beneath
not possible.
Higher supplement C.
Safety laser scanner high (H
S
> 300
(11.81 in.))
Low inclination of the scan plane
(H
D
≈ H
S
)
Lower protective field supplement
C.
Danger of crawling beneath (at the
front and side).
Safety laser scanner low (H
S
< 3300
(11.81 in.))
High inclination of the scan plane
(H
D
> H
S
)
Lower protective field supplement
C.
Danger of crawling beneath (at the
front), external effect due to
ambient light interference possible.
ATTENTION: If scan planes are at a height of more than 300 mm (11.81 in.)
verify that people cannot reach the hazardous area by crawling underneath
the scan plane.
If you mount the protective device higher than 300 mm (11.81 in.), you must
help prevent crawling beneath with additional measures. For applications
that are accessible to the public, the mounting height must be reduced to
200 mm (7.87 in.)
(1)
.
(1) See the appropriate regulations.
IMPORTANT The minimum supplement C to help prevent reaching over is 850 mm
(33.5 in.) (arm length).