User Manual

SAFETY
Safety handbook page - 33 -
PNSPO
EN 999 further on divides into three main applications based on the direction of
approach to the detection zone:
• Normal approach
(1)
d: detection capability of the sensor in mm ≤ 40mm
This formula applies for all minimum distances of S ≤
500mm. The minimum value of S shall not be < 100mm.
If S is calculated > 500mm then formula (2) can be
used. In this case the minimum value of S shall not be <
500mm.
(2)
If the sensor is used for applications like single or double break, the detection capability
has to be ≤ 30mm and the minimum distance S shall be > 150mm.
Sensors with
detection capability > 40mm and
≤
70mm
shall only be used where the
risk assessment indicates that detection of hands or fingers is not necessary. Then
formula (3) can be used.
(3)
If using single beams where risk assessment allows formula (4) shall be used.
(4)
•
Parallel approach
(5)
H is height of the detection zone above the floor in mm and
shall not be > 1000mm. The lowest allowable height shall be calculated by formula (6)
(6)
• Angled approach
If the sensor has been installed so that the angle of
approach β to the detection zone is within ± 5° the relevant
formula (2)/(3) or (5) will apply.
If angle is
β
> 30° use formula for normal and
β
< 30° for parallel approach.
S = ( 2000mm/s x T ) + 8 (d-14mm)
S = ( 1600mm/s x T ) + 8 (d-14mm)
S = ( 1600mm/s x T ) + 850mm
S = ( 1600mm/s x T ) + 1200mm
S = ( 1600mm/s x T ) + (1200mm – 0.4 H)
H = 15 x (d – 50mm)