Measurement Characteristics; Safety Applications - Pepperl+Fuchs MWC25M-L2M-B20 Series Manual

MWC25M-L2M-B20 series
Product Description
2.2

Measurement Characteristics

Sensor
Origin of distance measurement
The sensor has the following measuring ranges:
• Dead band:
•
•
•
• Sensing range:
•
•
•
•
• Extension:
•
2.3

Safety Applications

Radar sensors in the MWC25M-L2M-B20 series can be used in safety applications under cer-
tain circumstances, taking into account certain aspects up to PL c in combination with a diag-
nostics-enabled controller (e.g., PLC).
A "Safety Application Report" explains an example of a use case. You can download the appli-
cation report from www.pepperl-fuchs.com, on the product page for your MWC25M-L2M-B20
series radar sensor.
If you are interested in using MWC25M-L2M-B20 series radar sensors for safety applications,
contact an application specialist at Pepperl+Fuchs to discuss and review your use case.
Blind zone
Objects are not detected in the dead band. This area should remain free to ensure
reliable distance and velocity measurement of objects in the sensing range.
If objects are placed in the sensor's dead band, false reflections may occur in the
sensing range, causing incorrect distance values to be output.
Placing materials that absorb radar waves to a limited extent is possible in the dead
band, for example, mounting behind a plastic wall or thin glass pane. This may, how-
ever, limit the measuring range.
Objects can be detected in the sensing range if the cross-section of an object is suf-
ficient for radar reflections and the alignment is suitable for reflecting radar signals.
The maximum range of the sensing range is guaranteed under all ambient condi-
tions specified in the datasheet.
This range is the adjustment range accepted by the firmware. Readings related to
distances outside the sensing range, however, are not guaranteed measurement sit-
uations. Depending on the ambient conditions, the validity of the measured values is
not guaranteed. This range is used at the customer's own risk.
Measuring different materials and their object alignment with the sensor. For details,
see see chapter 3on the reflectivity of materials.
In the case of objects with a very large radar cross-section in the near range, the
physical properties may cause false reflections to occur for a short time if the read-
ings are not sufficiently filtered.
The measurement range extension specifies the sensor's operating reserve when
using the sensor under typical ambient conditions.
Sensing range Extension
13