Working Principle; Overview Circuit Diagram - Siemens 7KG6131 series Betriebsanleitung

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
25