31
1
st
sample calculation::
SG4-30Ix030C1
Assuming:
Light Curtain response time
t
1
= 5,7 ms
Machine
over-travel
time
t
2
= 20 ms
Approach speed
K = 2000 ms
1 obstructed beam
d = 47 mm
Because resolution is greater than 40 mm
C = 850 mm (see safety clearance calculation in section 3.3, „Calculating Safety Clearance per EN ISO 13855“)
Due to the fact that a safety clearance of 500 mm results alone from C, we only need to use K = 1600 mm/s for our
calculation.
S = (K × T) + C = 1600 mm/s × 0,0257 s + 850 mm = 891,12 mm
2
nd
sample calculation: SG4-30Ix030C1
Assuming:
Light Curtain response time
t
1
= 5,7 ms
Machine
over-travel
time
t
2
= 20 ms
Approach speed
K = 2000 ms
4 obstructed beams
d = 98 mm
Because resolution is greater than 70 mm, C = 1200 mm (see safety clearance calculation in section 3.3, „Calculat-
ing Safety Clearance per EN ISO 13855“)
Due to the fact that a safety clearance of 500 mm results alone from C, we only need to use K = 1600 mm/s for our
calculation.
S = (K × T) + C = 1600 mm/s × 0,0257 s + 1200 mm = 1241,12 mm
Is the exclusion area correctly barricaded, calculation could be run with a resolution of d = 30 mm
S = (K × T) + C = 2000 mm/s × 0,0257 s + 8 (30 mm – 14 mm) = 179,4 mm
