Siemens ET 200S - Page 400

Analog Electronic Modules
12-44
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Isolated Measuring Sensors (Continued)
Figure 12-1 illustrates the connection of isolated measuring sensors to the floating
analog input modules.
Isolated measuring
sensors
M+
M
L+
M–
M
ANA
M+
M–
Backplane bus
ADC
Ground bus
U
ISO
Logic circuitry
Recommended
connection
U
CM
Central grounding point
Figure 12-1 Connection of Isolated Measuring Sensors to a Floating Analog Input Module