Air gap sensor
SDP110
7
4 Function
•
The unit detects the distance of a workpiece using flow measurement.
•
The unit detects flow based on the calorimetric measuring principle.
•
As an additional process value the unit also detects the pressure.
•
The unit can be operated in SIO mode (standard input-output ) or in IO-Link mode.
•
The unit displays the current process values.
•
The unit has many self-diagnostic options.
•
A simulation mode allows simplified set-up of the sensor.
•
The unit generates two output signals according to the parameter setting.
4.1 Output OUT1 selection options
•
Switching signal distance
•
Switching signal flow
•
Switching signal pressure
•
IO-Link
•
OFF (output switched to high impedance)
4.2 Output OUT2 selection options
•
Switching signal distance
•
Switching signal flow
•
Switching signal pressure
•
Analogue signal distance
•
Analogue signal flow
•
Analogue signal pressure
•
Input for external distance teach
•
OFF (output switched to high impedance)
4.3 Distance measurement
The unit measures the volume flow (flow rate/time) and thus detects the distance: The closer a
workpiece is to a measuring nozzle, the lower the quantity of air that flows through the air gap
between the workpiece and the measuring nozzle.
•
The unit detects the airflow as a flow and converts it into a distance value.
•
The unit can output the distance value via an analogue signal.
•
The unit can output a switching signal when defined distance values are exceeded or not reached.
– Distance values can be taught (
26).
– Distance values can be configured (
8).
•
If the surface to be monitored covers several measuring nozzles, the volumetric flow is divided up
over the number of measuring nozzles. The unit calculates an average from all distance values. It
is therefore possible to monitor several measurement points. The number of measuring nozzles is
set via the parameter [NOZ].