Rockwell Automation 442L SafeZone Singlezone & Multizone Safety Laser Scanner - Manual (Page 45)

R
SafeZone™ Safety Laser Scanner User Manual
10000073050, July 2011 43
Original instructions
Basic response time for various resolutions
The following basic response times apply for the internal OSSDs with
standard multiple sampling of 2 without taking into account the
switching time for the monitoring cases.
Table 23: Response time with a resolution of 30 mm (hand
detection)
Table 24: Response time with a resolution of 40 mm (hand
detection)
Table 25: Response time with a resolution of 50 mm (leg
detection, stationary)
Table 26: Response time with a resolution of 70 mm (leg
detection, mobile)
Table 27: Response time with a resolution of 150 mm (body
detection)
Multiple sampling
The SafeZone safety laser scanner is always set to a minimum of two times
multiple sampling. From a multiple sampling of three you must add a
supplement to the response time. The related supplement is dependent on
the basic response time and the multiple sampling.
Table 28: Supplements for multiple sampling
11.3 Timing behavior of the OSSDs
The SafeZone safety laser scanner tests the OSSDs immediately after
switching on and then at regular intervals. For this purpose the SafeZone
safety laser scanner briefly switches off both OSSDs (for 300 μs) and
checks whether the channels are electrically isolated during this period.
Figure 64: Diagram of the test pulse at the OSSDs
Approx. 15 ms after the switch on of the OSSDs, the SafeZone safety
laser scanner performs the first voltage test
Πand then after a half basic
response time (see “Basic response time for various resolutions” on page
43) performs a second voltage test
Œ.
After a further half basic response time of the SafeZone safety laser
scanner there is a shut-down test
, 120 ms later a further voltage test Ž.
Then the SafeZone safety laser scanner performs a shut-down test and a
voltage test alternately at an interval of 120 ms. Figure 66, Figure 67 and
Figure 68 show the pulse durations for the individual tests.
B
= tB= Basic response time
T
MFA
= Supplement due to multiple sampling > 2
d = Resolutions of the SafeZone safety laser scanner (mm)
Maximum Possible Protective Safety Field
Size Basic Response Time
1.90 m 60 ms
2.80 m 120 ms
Maximum Possible Protective Safety Field
Size Basic Response Time
2.60 m 60 ms
3.80 m 120 ms
Maximum Possible Protective Safety Field
Size Basic Response Time
3.30 m 60 ms
4.80 m 120 ms
Maximum Possible Protective Safety Field
Size Basic Response Time
4.70 m 60 ms
5.00 m 120 ms
Maximum Possible Protective Safety Field
Size Basic Response Time
5.00 m 60 ms
5.00 m 120 ms
Multiple Sampling Basic Response Time 60 ms Basic Response Time 120 ms
3 times 30 ms 60 ms
4 times 60 ms 120 ms
5 times 90 ms 180 ms
6 times 120 ms 240 ms
7 times 150 ms 300 ms
8 times 180 ms 360 ms
9 times 210 ms 420 ms
10 times 240 ms 480 ms
11 times 270 ms 540 ms
12 times 300 ms 600 ms
13 times 330 ms 660 ms
14 times 360 ms 720 ms
15 times 390 ms 780 ms
16 times 420 ms 840 ms
IMPORTANT Ensure that the input electronics on
your machine or equipment do not
react to this test pulse and therefore
shut down the machine or equipment.
0.5 × basic response time
120 ms 120 ms 120 ms
Ca.
15 ms
OSSD1
OSSD2
t
t