120
100
80
60
40
20
0
0,1
0,2
20
10
30
40
50
60
70
80
90
100
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1
v
box
(m/sec)
a
bo
x
(mm) / w
bo
x
(mm)
Figure 29: Object distance and object width dependent on object speed
4.3.7.2
Minimum distance to the hazardous point with Smart Box Detection
Overview
The calculation of the minimum distance to the hazardous point with configured Smart
Box Detection depends on the application type.
Application type 1:
°
Object exit
2)
: Regardless of whether people on the transport level can be
ruled out.
°
Object entry
3)
: People can be ruled out at the transport level.
Application type 2:
°
Object entry
3)
: People cannot be ruled out at the transport level.
Calculation of the minimum distance to the hazardous point
The following formulas are available for calculating the minimum distance, depending
on the application:
•
Application type 1:
S = (t
1
+ t
2
) * K + Z
SBD
•
Application type 2:
S = (t
1
+ t
2
) * (v
box
+ K) + Z
SBD
Where:
•
S = minimum distance in millimeters (mm)
•
t
1
= response time of the protective device in seconds (s)
The response time is 0.08 s (independent of the protective field height and beam
coding).
•
t
2
= machine stopping time in seconds (s)
The machine stopping time is to be determined individually, e.g. 0.1 s
•
v
box
= object speed (mm/s), 100 mm/s … 1,000 mm/s
•
K = approach speed (stepping and/or gripping speed) of a person or a body part
(mm/s (see ISO 13855), e.g. 2,000 mm/s
•
Z
SBD
= supplement for reliably distinguishing between a valid object and a person
or body part in millimeters (mm),
Supplement Z
SBD
Supplement Z
SBD
indicates how far a person or body part can approach the hazardous
area before the protective device is triggered.
The value depends on the application type and the reduced resolution.
2)
Objects on the transport level move out of the hazardous area.
3)
Objects on the transport level move into the hazardous area.
PROJECT PLANNING
4
8021645/1EB0/2022-04-28 | SICK
O P E R A T I N G I N S T R U C T I O N S | deTec4
51
Subject to change without notice