Operating Instructions
Chapter
3
C 4000
Product description
8 009 221/16-11-00
©
SICK AG • Safety Systems • Germany • All rights reserved
19
3.4.7
Reduced resolution
Under reduced resolution, the light curtain allows the disruption of 1, 2 or 3 adjacent
beams. Objects which are not larger then specified in table table 4 may be moved through
the light curtain without the light curtain changing to red (Fig. 11,
and
).
Fig. 11: Schematic outline of
the operation with reduced res-
olution (example: reduction by
one beam)
Notes
·
The function Reduced Resolution can be used only in devices with a physical resolution
of 14 mm and 20 mm.
·
The first beam of the light curtain (close to the 7-segment display) must not be interrupt-
ed. Otherwise, the safety light curtain will change to red.
·
The system response time does not change under reduced resolution.
·
With reduced resolution, the 7-segment display indicates
r
as soon as sender and re-
ceiver are aligned.
WARNING
Check the safety distance S!
The safety distance S required under reduced resolution depends on the
effective resolu-
tion
.
>
If required, recalculate the safety distance and readjust it on the machine.
Example: – Physical resolution 14 mm
– Resolution reduced by 1 beam
– Effective resolution 22 mm
Calculate the safety distance with a resolution of 22 mm.
>
Mark the effective resolution on the notice label of sender and receiver.
Fig. 12: Marking the effective
resolution on the device label
Physical resolution
Reduction
Effective resolution
Maximum size of
movable objects
14 mm
1 beam
22 mm
10 mm
2 beams
30 mm
18 mm
3 beams
37 mm
25 mm
20 mm
1 beam
30 mm
14 mm
2 beams
40 mm
24 mm
3 beams
Not possible
—
S
S
Tab. 4: Effective resolution and
maximum size of moving
objects under reduced
resolution
