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2.3 Working principle
Via resistors (1), the input voltage U
converter (2). The rectangular signal generated by this is transmitted via a
transformer (3) to the output side, fi ltered and conditioned by the amplifi er
(4). The output amplifi er (5) supplies a load-independent direct current I
proportional to the input signal or a load-independent direct voltage U
adjustment of the characteristic curve can be carried out with the reference
current I
.
const
The auxiliary power isolator (6) generates the galvanically isolated supply
voltage of the input circuit.
The auxiliary power U
an AC or DC voltage auxiliary power module (8).
2.4 Overview circuit diagram
1
U
E
I
E
6
1.
input voltage adaptation via resistors
2.
pulse-pause-ratio voltage converter
3.
transformer
4.
amplifi er
5.
output amplifi er
6.
auxiliary power isolator
7.
constant voltage source
8.
auxiliary power module
is adapted to the pulse-pause-ratio voltage
E
~ or U
- is converted into the internal supply voltages via
H
H
2
3
SIMEAS-T - Transducer with Auxiliary Power
4
5
7
I
const.
8
A
. Zero
A
I
A
U
A
U
H
5
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