Operating Instructions MBI 46.51.39
Version 0.9
en MBI 46.51.39 operating instructions.docx
Issue: 08/2022
page 8 from 29
4.2 Function and design
The
MBI 46.51.39 carrier frequency amplifier
generates an alternating excitation voltage
required for the operation of inductive displacement transducers. The carrier frequency is
typically 5 kHz, unless otherwise specified.
The output signal from the displacement transducer is pre-amplified by the measuring amplifier
and evaluated ratiometrically, i.e. in relation to the supply voltage. This avoids measurement
errors due to fluctuations in the supply voltage e.g., due to impedance change of the
displacement transducer or cables.
In the following stages, the measurement signal is filtered and scaled to the desired output
range for further processing.
4.3 Suitable displacement transducers
The device series can be used with a variety of inductive transducers. Further details may be
found in chapter 11 or in the respective datasheet.
For selection of suitable sensor / amplifier combination
•
Type of displacement sensor (LVDT, LVIT, others)
•
Wiring details of the sensor
•
Required carrier frequency
•
Excitation voltage
•
Rated output / sensitivity
TIP
