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4 Analog I/O Specifications
4.1.3 Analog Input Modules (4 to 20-mA, 4 channels)
3) The following diagram shows the circuit configuration.
Current signal source
4 to 20 mA
Current signal source
4 to 20 mA
Voltage signal source
1 to 5 V
Voltage signal source
1 to 5 V
Multiplexer
Shield 1
Shield 2
Shield 3
Shield 4
4700 pF
4-16
+5 V
Status
indication
Photocoupler
Insulated
+15 V
DC/DC
-15 V
converter
0 V (analog)
+5 V
0 V
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