Pilz PSEN op4B-S-3-080 - Manual (Page 16)

PSEN op4B Series Operating Manual
12
Please note: The value of K is:
2000 mm/s, if the value calculated for S is ≤ 500 mm,
1600 mm/s, if the value calculated for S is > 500 mm.
If it is possible to access the danger zone from above and below (Fig.
5) and the devices used have a resolution of >40 mm, the upper beam
must be positioned at a height of 900 mm (H2), starting from the
reference plane (e.g. base of the machine), and the lower beam must
be positioned at a height of 300 mm (H1).
If the safety light curtain is to be installed horizontally
(Fig. 6), the distance between the danger zone and the furthest optical
beam must equal the value calculated using the following formula:
S = 1600 mm/s (t
1
+ t
2
) + 1200 – 0.4 H
where:
S
= Minimum safety distance in mm between the protected field
and the danger zone
t
1
= Reaction time of the safety light curtain in seconds (Ch. 10
“Technical details”).
t
2
= Machine's overrun time in seconds
H = Height of the beams above the floor. This height must always
be less than 1000 mm.
Fig. 6