4
Space for mounting or replacing the device
5
Overrun
If no weather hood is used, the device must be protected against direct weather
influences by other suitable measures.
b
The weather protection should prevent rain and water spray from getting onto the
device.
b
The weather protection should protect the device from direct sunlight.
b
The weather protection should ensure that no running water flows or drips through
the protective field.
b
Adequately dimension the viewing slit,
see "Dimensional drawings", page 154
. For
overrun
5
> 200 mm: Take the scan field flatness into account when dimension‐
ing the viewing slit.
b
In environments with very low ambient temperatures or rapid changes in tempera‐
ture, equip the weather protection with thermal insulation.
4.4.3
Response time of the safety laser scanner
The safety laser scanner’s response time must be taken into account, among other
things, so that the safety laser scanner can be positioned in a suitable location and the
protective fields can be sized correctly.
The response times are specified in the technical data,
.
The response time of the safety laser scanner resulting from current settings is shown
in Safety Designer.
4.4.4
Monitoring case switching time
When switching between monitoring cases, it is possible that a person may already be
in the newly activated protective field when switching takes place. Only switching in time
(namely before the danger arises for the person at this location) ensures protection.
DANGER
Hazard due to lack of effectiveness of the protective device
b
Switching of the monitoring case should be timed so that the safety laser scanner
detects a person in the protective field with a sufficient minimum distance, before
the dangerous state occurs.
DANGER
Hazard due to lack of effectiveness of the protective device
Persons or parts of the body to be protected may not be recognized or not recognized in
time in case of non-observance.
In addition to the parameters considered below, the switching signal’s propagation
delay time up to the protective device also influences the switching duration. These
include the network cycle time and the processing time of a control, for example.
b
Take account of the switching signal’s propagation delay time up to the protective
device.
In some cases, the process of switching between monitoring cases takes so long that
the new monitoring case is not available inside the response time provided. This means
that it may not be possible to detect a person in the protective field in time. In cases
like this, you must start switching between monitoring cases earlier.
The following parameters influence the duration of the process:
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Subject to change without notice