Siemens SIMATIC FS400 Anleitung Seite 144

b
a
e
f
Fig. 6.1-1: Safety distance (a) for danger point guarding
*) If this value cannot be achieved because of the safety distance, other measures, e.g.
mechanical barriers, must guarantee the required maximum distance of 75 mm.
If AOPDs with additional control functions are used, the resolution must be
and the minimum distance must be S
S [mm] = 2000 [mm/s] x (t
Calculation example for danger point guarding:
A light curtain 14 mm resolution, 1500 mm protective field height with transistor output
is in direct use on a press with a 150 ms stopping time. The response time of the
evaluation instrument is 20 ms.
Stopping time of the machine, t
Response time t
Response time t
Resolution d of the AOPD
T = 0.150 + 0.033 + 0.020
S = 2000 x 0.203 + 8 x (14 -14)
Make certain during assembly that it is not possible to reach over, around or under or to
walk behind the protective device.
To prevent someone from walking behind the safety equipment, the distance between
the machine table and the light curtain may only be a max. 75mm. Walking undetected
behind can be prevented, for example, by mechanical barriers or with a host/guest
arrangement of the light curtain.
144
c
d
≥
+ t
AOPD Interface
=
Machine
=
AOPD
=
Interface
=
=
=
a = Safety distance (S)
b = Measures to prevent penetration from above
c = Measures to prevent penetration from the sides
d = Measures to prevent penetration from the rear
e = Measures to prevent penetration from below
f = 75 mm – Maximum distance to avoid walking
behind*
150 mm.
+ t ) [s] + 8 x (d-14) [mm]
Machine
150 ms.
33 ms.
20 ms
14 mm
0.203 s
406 mm
≤
30 mm