Pilz PSEN op4F-A Series Operating Manual page 10

OPERATING MANUAL
The safety distance is calculated using the following formula:
Therefore:
S Minimum safety distance in mm
K Speed of the object (limb or body) approaching the danger zone in mm/s
t1 Light curtain's response time in seconds (see Chapter 11)
t2 Machine's stopping performance in seconds
C Additional distance based on the possibility of placing the body or limb into the danger
zone before the protective device responds
8 (d -14) for devices with a resolution ≤ 40 mm
C
C 850 mm for devices with a resolution > 40 mm
d Device's resolution
Note:
The value K corresponds to:
• 2000 mm/s, if the calculated value S is ≤ 500 mm
•
1600 mm/s, if the calculated value S is > 500 mm
When using light curtains with a resolution of > 40 mm, the upper beam must be positioned
at a height of ≥ 900 mm (H2) from the supporting base, while the lower beam must be
positioned at a height of ≤ 300 mm (H1).
Where the light curtain must be installed horizontally (Fig. 4), the distance between the
danger zone and the most distant optical beam must correspond to the value calculated
using the following formula:
Therefore:
S Minimum safety distance in mm
t1 Light curtain's response time in seconds (see Chapter 11)
t2 Machine's stopping performance in seconds
H Height of the beams above the floor. This height must always be less than 1000 mm.
10
S = K (t1 + t2) + C
S = 1600 mm/s (t1 + t2) + 1200 – 0.4 H
Fig. 4 – Safety distance (horizontal)
PSEN op4F/H-A series
1003067-EN-04