Fiessler ULVT - Vertical Protection for Hazardous Areas by Light Grids (> 40 MM Resolutiion and Single Beams)

4.2.3 Vertical protection of hazardous areas by 2-, 3-, 4- beam light grids (EN 999 / ISO 13855)
(valid for more than 40 mm resolution)
4 Installation - Safe distance
example:
overrun period of the machine : 75 ms
The safe distance for a light grid ULVT... with 2 beams
S = (1600 mm /s
.
0,075 s) + 850 mm
S = 976 mm
Formula for calculating the
safe distance with vertical
protection of hazardous
areas using 2-, 3-, 4-beam
light grids:
Positioning of the beams
0,3
1,1
0,7
0,4
0,9
0,3
0,9
0,6
1,2
S = (1600 mm / s
.
T) + 850 mm
Number of beams: 4
Number of beams: 3
Number of beams: 2
trasnmitter
receiver
receiverreceiver
H = Height of protective field to reference level
fig 16/1 Vertical protection
trasnmitter
trasnmitter
FIESSLER
E L E K T R O N I K
16
Fiessler Elektronik GmbH & Co. KG
Doku Nr. 958 Stand 22.01.2018 RK
Phone: +49 (0) 711 / 91 96 97-0 Internet: http://www.fiessler.de
Fax : +49 (0) 711 / 91 96 97-50 eMail: info@fiessler.de