IDEC FS1A-C11S, User Manual

Page: 391 / 398

APPENDIX
A-3
A
P
P
E
N
D
IX
Example in which the direction of entry is horizontal to the safety light curtain
Use the following formula to calculate the minimum distance (distance to the farthest optical
axis).
S = K × (Tc + T1 + T2) + C
Tc = t1 + t2
C = (1200
– 0.4 × H)
K = 1600 (mm/s)
t1 = 0.04 (s)
t2 = 0 (s), 0.1 (s), 0.5 (s), 1 (s), 2 (s), 5 (s), 15 (s), 30 (s)
T1(s) (Check the specifications of the safety light curtain.)
T2(s) (Check the maximum time from when the safety output of the SafetyOne is turned OFF
when the hazard is stopped)
C = (1200
– 0.4 × Height of the optical axis H (mm)) (However, C ≥ 850 (mm))
The height of the maximum allowable optical axis (H) must be within a range of
15 (d
– 50 (mm)) ≤ H ≤ 1000 (mm) .
Futhermore, when the valus of H calculated using H ≥ 15 ( d – 50 ) is H ≥ 300 (mm) , there is an
unexpected proximity risk in where objects can not be detected below the detection zone. This
must be taken into consideration for a risk assessment.