Connecting Voltage And Current Transducers - Siemens SIMATIC C7-626 Installation, Assembly, Wiring

6.1.1

Connecting Voltage and Current Transducers

Abbreviations and
The abbreviations and mnemonics used in Figures 6-3 to 6-4 have the
Mnemonics
following meanings:
Connecting
Figure 6-3 shows the connection of voltage transducers to an isolated analog
Voltage input.
Transducers
Figure 6-3
Connecting
4-wire transducers possess a separate voltage supply. Figure 6-4 shows the
Current
connection of current transducers as 4-wire transducers to a non-isolated
Transducers as
analog input module.
4-Wire
Transducers
Figure 6-4
C7-626 / C7-626 DP Control Systems
C79000-G7076-C626-01
AIx-X: Measuring line AIx-I or AIx-U
AIx-M: Reference potential of the measuring line
M : Reference potential of the analog measuring circuit
ANA
AIx-U
+
U
AIx-M
–
+ AIx-U
U
AIx-M
–
Connecting Voltage Transducers to an Isolated Analog Input
Transducers, e.g.
pressure gauges
+
P
–
+
P
–
L+ M
Connecting 4-Wire Transducers to a Non-Isolated Analog Input Module
C7 Analog Input/Output
ADC
M
ANA
AIx-U
AIx-M
ADC
AIx-U
AIx-M
M
ANA
Lo
gic C7 CPU
Lo
gic C7 CPU
6-5
6