/30
IRMA MATRIX Door Clear option | Mounting and operating instructions
released
4.2 Door Clear limitations and conditions of use
What do I have to consider when installing and commissioning Door Clear?
The following overview describes the characteristics of Door Clear, its application
limitations in the function area and which measures you may have to take.
Tbl. 2: Door Clear limitations and conditions of use
Term Description / Action Limitation during application
Active Door Clear zone
The 3-dimensional Door Clear zone, which
evaluates the obstacle clearance in the function
area, is called the active Door Clear zone in the
sensor´s field of vision. Due to the pyramid-shaped
sensor´s field of view, only the shape of a cut-off
pyramid is possible for the Door Clear zone. This
means that the configured Door Clear volume is cut
off by the pyramid-shaped sensor´s field of view or
defined as a pyramid stump in the field-of-view-
pyramid (see
Fig. 1).
• No evaluation with regard to the
Door Clear status of the subareas of
the configured Door Clear zone
invisible to the sensor
• No monitoring of the very close left
and right sensor areas
Optical axis
The optical axis of the sensor is the center of the
field-of-view-pyramid and is 90° to the sensor. The
optical axis is visible as a red-framed rectangle in
the DC configurator. The active and configured
Door Clear zone must contain the sensor´s optical
axis:
• A Door Clear configuration outside
the optical axis would lead to
malfunction, as the sensor firmware
always automatically configures the
pixeled Door Clear zone around the
optical axis, and is not possible!
Shading effect
If a person/object outside the Door Clear zone
interferes with the sensor´s view of the active Door
Clear zone, independent of obstacles in the active
Door Clear zone the sensor always reports a “Clear”
status due to the “shading effect”. It is therefore
important to avoid any shading effect by keeping
the distance between the sensor and the DC zone
as small as possible (configuration via z-plane, see
•
Persons / objects located closely
under the sensor trigger a shading
effect