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Chapter5 Installation Considerations
F3SG-SR
User’s Manual
Wiring and Installation
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-SR from ON to OFF (s)
• a: Height of machine hazardous zone (mm)
• b: Height of upper edge of detection zone (mm)
When Tm = 0.05 s, Ts = 0.008 s, a = 1,400 mm, b = 1,500 m:
From the table above, Cro = 850 mm. Since b is between 1,400 mm and 1,600 mm, b = 1,400
mm which has the greater Cro value, shall be used.
S = 2,000 mm/s × (0.05 s + 0.008 s) + 850 mm
= 966 mm
Since 966 mm is greater than 500 mm, use K = 1,600 mm/s and recalculate it.
S = 1,600 m/s × (0.05 s + 0.008 s) + 850 mm
= 942.8 mm
Compare S = 942.8 mm with the calculation for Detection Zone Orthogonal to Direction of
Approach, and choose the larger value as the safety distance.
For the system with a detection capability of 40 mm max., the safety distance S is 942.8 mm
since this is larger than S = 116 mm calculated in the calculation example of n Detection Zone
Orthogonal to Direction of Approach.
For the system with a detection capability larger than 40 mm, the safety distance S is 942.8 mm
since this is the same value as S = 942.8 mm calculated in the calculation example of Detection
Zone Orthogonal to Direction of Approach.
Refer to Detection Zone Orthogonal to Direction of Approach under 5-1-2-1. Safety Distance Formulas according
to ISO 13855/EN ISO 13855.
Height of
hazardou
s zone, a
Height of upper edge of detection zone, b
900 1000 1100 1200 1300 1400 1600 1800 2000 2200 2400 2600
Additional distance to hazardous zone, Cro
2600 0 0 0 0 0 0 0 0 0 0 0 0
2500 400 400 350 300 300 300 300 300 250 150 100 0
2400 550 550 550 500 450 450 400 400 300 250 100 0
2200 800 750 750 700 650 650 600 550 400 250 0 0
2000 950 950 850 850 800 750 700 550 400 0 0 0
1800 1100 1100 950 950 850 800 750 550 0 0 0 0
1600 1150 1150 1100 1000 900 850 750 450 0 0 0 0
1400 1200 1200 1100 1000 900 850 650 0 0 0 0 0
1200 1200 1200 1100 1000 850 800 0 0 0 0 0 0
1000 1200 1150 1050 950 750 700 0 0 0 0 0 0
800 1150 1050 950 800 500 450 0 0 0 0 0 0
600 1050 950 750 550 0 0 0 0 0 0 0 0
400 900 700 0 0 0 0 0 0 0 0 0 0
20060000000000000
0 000000000000
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