Omron F3SG RE Series Quick Installation Manual page 14

Possible Circumventing by Reaching Over the Detection Zone
If access to the hazardous zone by reaching over the detection zone of vertically mounted F3SG-R cannot be
excluded, the height and the safety distance, S, of the F3SG-R shall be determined. S shall 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 (5)
• S: Safety distance
• K: Approach speed to the detection zone
• T: Total response time of the machine and F3SG-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 (5) 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
hazardous 900
zone, a
2600 0
2500 400
2400 550
2200 800
2000 950
1800 1100
1600 1150
1400 1200
1200 1200
1000 1200
800 1150
600 1050
400 900
200 600
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)
• Tm: Machine's response time (s)
• Ts: Response time of the F3SG-R from ON to OFF (s)
• a: Height of machine hazardous zone (mm)
• b: Height of upper edge of detection zone (mm)
13
Height of upper edge of detection zone, b
1000 1100 1200
Additional distance to hazardous zone, Cro
0 0 0
400 350 300
550 550 500
750 750 700
950 850 850
1100 950 950
1150 1100 1000
1200 1100 1000
1200 1100 1000
1150 1050 950
1050 950 800
950 750 550
700 0 0
0 0 0
0 0 0
1300 1400 1600
0 0 0
300 300 300
450 450 400
650 650 600
800 750 700
850 800 750
900 850 750
900 850 650
850 800 0
750 700 0
500 450 0
0 0 0
0 0 0
0 0 0
0 0 0
Safety
distance (S)
Hazard
b
a
300 mm max.
Reference plane
1800 2000 2200
0 0 0
300 250 150
400 300 250
550 400 250
550 400 0
550 0 0
450 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
Quick Installation Manual
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
F3SG-RE