107031-33-EN FR26 GLO 1101 Printed in France
17
3.4.4
US OSHA/ANSI/RIA standards requirements
All distances/heights in inches (1 in = 25,4 mm)
LIGHT CURTAIN MODEL
FF-SYA14
FF-SYA30
FF-SYA60
Ds
≥≥≥≥
63 (Ts+Tc+Tr) + 0,94
Ds
≥≥≥≥
63 (Ts+Tc+Tr)+ 3,08
Ds
≥≥≥≥
63 (Ts+Tc+Tr) + 7,10
If Hi
≤≤≤≤
12 and Hu > 48 (Typical for Reach Thru).
Ds
≥≥≥≥
63 (Ts+Tc+Tr) + 48
Ds
≥≥≥≥
63 (Ts+Tc+Tr)+ 48
Ds
≥≥≥≥
63 (Ts+Tc+Tr) + 48
Normal approach
If Hi
≤≤≤≤
12 and 36
≤≤≤≤
Hu
≤≤≤≤
48 (Typical for Reach Over)
If Hi > 12, supplemental safeguarding may be required to detect crawling underneath.
Ds
≥≥≥≥
63 x (Ts + Tc + Tr) +48
Allowable field heights
(for FF-SYA14 and FF-SYA30):
0
≤
H
≤
39
Allowable field heights
(for FF-SYA60):
5,5
≤
H
≤
39
Parallel approach
If H > 12, supplemental safeguarding may be required to detect crawling underneath.
Angled approach
α
If
α
≥
30°, then use the normal approach formula
If
α
< 30°, then use the parallel approach formula
FF-SYA234
MULTIBEAM SYSTEMS
FF-SYA03400
FF-SYA04300
Number of beams
3
4
Beam spacing
15.76
11.82
Beam heights above the
reference plane
11.82
27.58
43.34
11.82
23.64
35.46
47.28
Ds
≥≥≥≥
63 (Ts + Tc + Tr) + Dpf
If Hi < 12 and 36
≤≤≤≤
Hu
≤≤≤≤
48
then Dpf = 48
(Reach Over)
If Hi < 12 and 36
≤≤≤≤
Hu
≤≤≤≤
48
then Dpf = 48
(Reach Over)
If Hi
≤≤≤≤
12 and Hu > 48
then Dpf = 36 (Reach Thru)
Normal approach
If Hi > 12, supplemental safeguarding may be required to detect crawling underneath.
Where:
Ds = K x (Ts + Tc + Tr) + Dpf
§
Ds
is the
Minimum safety distance (in inches, 1 in = 25,4 mm)
§
K is the Approach speed (called “hand speed”) = 63 in/s minimum
§
Ts is the Worst case stopping time of the machine (s)
§
Tc is the Worst case response of the machine’s control (s)
§
Tr is the Response time of the safety devices (light curtains plus its interface meaning the response time including the
mechanical relay outputs in seconds)
§
Dpf is the Depth penetration factor (inches)
§
H is the Height of the detection plane above the reference floor (in)
§
Hu is the Height of the uppermost beam above the reference floor (in)
§
Hi is the Height of the lowest beam above the reference floor (in). For normal approach, assumption is that Hi is not greater
than 12 inches unless the application prevents access even with Hi at a distance greater than 12 inches)
F
SYA1
3
B
F
SYA1
4
B
F
SYA1
5
B
F
SYA1
3
B
