Siemens S7-400PLC Specifiche Pagina 226

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Analog modules
5.11 Connecting current sensors
S7-400 Automation System Module Data
226 Reference Manual, Edition 09/2009, A5E00850736-06
Connecting 4-wire transducers
1
2
3
M+
M-
M+
M-
M
ANA
+
-
+
-
U
H
P
P
M +: Measuring line (positive)
M -: Measuring line (negative)
M
ANA
: Reference potential of the analog measuring circuit
U
H
: Auxiliary voltage
(1) Sensor, for example, pressure gauge
(2) 4-wire transducer
(3) Connection required for modules with M
ana
Figure 5-10 Connecting 4-wire transducers to an AI
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