Omron F3SG series User Manual page 147

be determined by comparison of the calculated values in Detection Zone Orthogonal to Direction of
Approach. The greater value resulting from this comparison shall be applied.
S=(K × T) + Cro . . . Formula (4)
• S: Safety distance
• K: Approach speed to the detection zone
• T: Total response time of the machine and FSG-R
• Cro: Approach distance based on the distance which
personnel can move towards the hazardous zone of a
machine by reaching over the detection zone. The distance
is determined in the table below based on the height of the
hazardous zone, a, and the height of the upper edge of the
detection zone, b.
Note: Lower edge of the detection zone above 300 mm in
relation to the reference plane does not offer sufficient
protection against crawling below.
First, use K = 2,000 mm/s in formula (4) for the calculation. If the result of this calculation is less than
100 mm, use S = 100 mm.
If the result exceeds 500 mm, use K = 1,600 mm/s to recalculate it. If the result of the recalculation is
less than 500 mm, use S = 500 mm.
Height of
hazardou 900 1000
s zone, a
2600 0 0
2500 400 400
2400 550 550
2200 800 750
2000 950 950
1800 1100 1100
1600 1150 1150
1400 1200 1200
1200 1200 1200
1000 1200 1150
800 1150 1050
600 1050 950
400 900 700
200 600 0
0 0 0
Note 1. Upper edge of the detection zone below 900 mm is not included since they do not offer
sufficient protection against circumventing or stepping over.
Note 2. When determining the values of this table, it shall not be interpolated. If the known values a, b
or Cro are between two values of this table, the greater safety distance shall be used.
[Calculation example]
• T: Tm + Ts (s)
Height of upper edge of detection zone, b
1100 1200 1300 1400
Additional distance to hazardous zone, Cro
0 0 0 0
350 300 300 300
550 500 450 450
750 700 650 650
850 850 800 750
950 950 850 800
1100 1000 900 850
1100 1000 900 850
1100 1000 850 800
1050 950 750 700
950 800 500 450
750 550 0 0
0 0 0 0
0 0 0 0
0 0 0 0
Wiring/Installation
Safety
distance (S)
Hazard
b
a
300 mm max.
Reference plane
1600 1800 2000 2200
0 0 0 0
300 300 250 150
400 400 300 250
600 550 400 250
700 550 400 0
750 550 0 0
750 450 0 0
650 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
2400 2600
0 0
100 0
100 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
E
F3SG-R
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User's Manual