Leuze electronic SD4T 14 - Page 31

Installation
Leuze electronic SOLID-4 31
TNT 35/7-24V
DEUTSCHENGLISHFRANÇAISITALIANOESPAÑOLNEDERLANDS
Beam heights with use of Safety Light Curtains for access guarding in accordance
with EN 999 and EN ISO 13857:
Table 6.1-1: Beam height
s above the reference plane and additional amount C for
access guarding applications
Calculation formula for safety distance S based on EN 999:
Calculation of the safety distance for a Safety Light Curtain with a resolution of up to 40
mm
, used for access guarding. The safety distance S is calculated as per EN 999
according to the formula:
Version Resolu-
tion
Lowest beam above
reference plane
Highest beam above
reference plane
Additional
amount C
(see formula)
SD4-14-hhhh 14 mm As per EN ISO 13857 As per EN ISO 13857 0 mm
SD4-20-hhhh 20 mm As per EN ISO 13857 As per EN ISO 13857 48 mm
SD4-30-hhhh 30 mm As per EN ISO 13857 As per EN ISO 13857 128 mm
SD4-40-hhhh 40 mm As per EN ISO 13857 As per EN ISO 13857 208 mm
SD4-90-hhhh 90 mm 300 mm 1200 mm 850 mm
S [mm] = K [mm/s] x T [s] + C [mm]
S = Safety distance in mm
K = Approach speed in mm/s
In the close area of 500 mm, 2,000 mm/s is used for the calculation. If the dis-
tance is greater than 500 mm, K = 1,600 mm/
s
can be used for the calculation.
In this case, however, a minimum of 500 mm applies for the safety distance.
T = Total delay time in seconds;
total from:
The response time of the protective device, t
AOPD
a)
The response time of the safety interface, if any, t
Safety interface
b)
The machine’s stopping time, t
Machine
c)
C = 8 x (d-14) in mm
Additional amount depending on the depth of penetration into the protective field
before t
urning on the AOPD
d = Resolution of AOPD up to a maximum of 40 mm
a) See Chapter 11.2
b) See technical data of the safety interface
c) See technical data of the machine or stopping time measurement
S [mm] = 2000 [mm/s] x (t
AOPD
+ t
Safety interface
+ t
Machine
) [s] + 8 x (d-14) [mm]