Installation
Leuze electronic
SOLID-4
31
T
N
T
35/
7-
24V
DEUTSCH
ENGLISH
FRANÇAIS
IT
ALIANO
ESPAÑO
L
NEDERLANDS
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 heights 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 turning 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]
