WS-Module


Measuring range	-4...-20mV / 1...1000µm
Suitable sensors / measuring chains	Eddy current sensors with signal converter
Type of evaluation	Peak rectification (0-P / P-P)
Supply voltage WS module	18 ... 36 VDC
Current consumption WS module	max. 130 mA
Power supply signal converter / measuring chain	-24VDC / 35mA
Measuring range setting	by fixed resistor
Tape fit adjustment	by fixed equipment
Default setting	U_in: -4...-20VDC / 0...250mm / I_out 4...20mA
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 processing

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, the AC signal is normalised to the measuring range, passed through a bandpass filter and rectified in the peak value rectifier. The signal is converted into a standard current signal and output as a 4...20 mA 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 power failure. In the event of a fault, the current output is switched to 0 mA and the green LED goes out.