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EN
8. Function Descriptions
PNCB High-Performance Distance Sensors work with a high resolution CMOS line array and determine dis-
tance by means of an angular measurement at a sampling rate of up to 30 kHz. The sensor is equipped with
integrated electronics and no additional controller is required as a result.
Ascertained distance values are read out as process data via the interface and at the analogue output with16-
bit resolution.
Blindzone
Measuring Range
Distance to the object
4 mA
20 mA
The diffusely refl ected light from the measuring point is decisive for the measurement. Inadequate intensity
of the remitted light is indicated by an LED signal lamp on the sensor’s control panel. In the event of minimal
remission, the sensor automatically reduces its sampling and output rates, in order to provide accurate mea-
surement results. Signal strength is indicated on the website as a percentage (see “Status Display” in section
“9.1. Page Layout (website)” on page 22 ).
Not only does the laser spot produce an illuminated pixel on the CMOS line array, it also generates an intensity
curve which is distributed over several pixels. This intensity curve is called the peak, and ideally it’s steep at
both ends, monotonically non-decreasing and symmetrical. The curve depends on distance, internal optics
and the surface of the object to be measured. The evaluation method is decisive with regard to attainable mea-
suring accuracy. Some surfaces require an evaluation method which is especially suited to them.
