Rockwell Automation 442L-SFZNMN SafeZone Mini Safety Laser Scanner User Manual - Manual (Page 28)

26 Rockwell Automation Publication 10000337275 Ver 01—October 2014
Chapter 5 Mounting
Response time T
S
of the SafeZone Mini
The response time T
S
of the SafeZone Mini depends on …
• The basic response time of the SafeZone Mini.
• The multiple sampling set.
See Chapter 12 “OSSD response times” on page 55.
Supplement Z
R
for measurement errors caused by reflection
Avoid mounting retroreflectors at a distance of less than one meter from the boundary of the protective
field!
With retroreflectors positioned at a distance of less than 1 m (39.4 in.) from the boundary of the protective field a
supplement, Z
R
, of 200 mm (7.87 in.) must be added to the protective field.
Supplement C for protection against reaching over
With a protective field installed horizontally, there is a risk that people may reach over the protective field and in this way
reach the hazardous area before the SafeZone Mini shuts down the dangerous state. For this reason the calculation of the
minimum distance must take into account a supplement to prevent persons from finding themselves in a hazardous
situation by reaching over (see EN ISO 13857) before the SafeZone Mini triggers.
The necessary supplement for the minimum distance is dependent on the height of the scan plane for the protective field.
At low heights
the supplement is larger than at greater heights and .
Fig. 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. The optimal variation
depends on the related application. Table 8 provides assistance making the selection.
Table 8: Advantages and disadvantages of mounting
variations [mm (in.)]
H
D
= Detection height
H
S
= Scanner mounting height
In case of scan planes at a height of more than 300 mm (11.81 in.) ensure 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 prevent crawling beneath by means of
additional measures. For applications that are accessible to the public, the mounting height may need to be reduced to
200 mm (7.87 in.)(on this subject see the appropriate regulations).
ATTENTION
  
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)
Mounting orientation Benefit 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