Parameter setup and measuring operation
38
LDM52 OEM, Release 003, Revision 000
6.6
Q1/Q2/Q3 – Switching output
The switching outputs Q1, Q2 and Q3 show distance information as logic switching information.
They signalize when values are above or below a preset switching range subject to hysteresis.
Hence, they are perfectly suitable for the direct further processing of monitoring variables such
as filling level or object detection. Parameterization is done via the serial interface.
A load resistance of > 150 ohms must be switched against GND
power
at the switching output. It is
essential that the load current of 0.2 A is not exceeded.
The switching outputs work with CMOS level:
low = 0 U < 0,8 V
high = 1 U > 2,0 V
Typical resistance: 1 kohm against GND
power
(not against GND
signal
)!
Q1/Q2/Q3 parameterizes the behavior of the switching outputs.
Parameterization covers the beginning w of the measurement range, i.e. the point where the
output will switch, the length x of the measurement range, the hysteresis y and the logic
behavior z.
Figure 3 Switching behavior and parameters of the switching outputs
