Siemens Simatic S7-300 - Page 183

Priniples of analog value processing
4.4 Connecting current transducers
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
4-9
Wire 2-wire transducer with supply from L +
When the supply voltage L+ is fed from the module, configure the 2-wire as a 4-wire
transducer in
STEP 7 .

0
ದ
0ದ
/
0
0$1$
3
/RJLF
$'&
ZLUH
WUDQVGXFHU
%DFNSODQH
EXV
6HQVRU
HJSUHVVXUH
JDXJH
Figure 4-7 Wire 2-wire transducers with supply from L + to electrically isolated AI
Wire 4-wire transducer
4-wire transducers are supplied separately with power.
0

0ದ
ದ

ದ
0
0ದ
/
0
/ 0
/ 0
0$1$
3
3
/RJLF
$'&
'08
'08
%DFNSODQH
EXV
6HQVRU
HJ
SUHVVXUH
JDXJH
Figure 4-8 Wire 4-wire transducers to electrically isolated AI