RD-Module


Measuring range	1 ...35mm (adjustable)
Suitable sensors / measuring chains	Eddy current sensors with signal converter
Power supply sensor / electrode	-24VDC / 35mA
Supply voltage RD module	18 ... 36 VDC
Current consumption RD module	max. 130 mA
Measuring range setting	by means of a fixed resistor
Inverting the measuring signal	by means of a fixed resistor
Default setting	U_in: -4...-20VDC / I_out 4...20mA
Offset / zero point correction	+/- 10% by means of potentiometer
Measuring circuit monitoring	Power failure / signal error
Output signal in case of error	0mA / green LED goes out
Hold time error signal (0mA)	20 seconds
Material module housing	Polycarbonate
Protection (DIN 40050)	IP 20
Permissible operating temperature	-20 ... +70 °C
Electrical connection according to UL standard	AWG/kcmil: 30-12
Clamps for wire cross-section	0,2 up to 1 mm²

Signal conditioning

The output signal of the sensor is divided into three function paths at the signal input:

Signal conditioning
Decoupling for the analysis output
Measuring circuit monitoring

In signal conditioning, it is possible to shift the characteristic electrically and to invert the direction of action. The signal is converted into a current signal and output as a 4...20 mA standard signal.

At the test output, the sensor signal is available unfiltered and decoupled for measuring and analysis purposes.

The measuring circuit monitoring detects a sensor defect as well as a voltage failure. In the event of a fault, the current output is switched to 0 mA and the green ok LED goes out.