SBC PCD2.M5 Series - Page 175

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Analogue input modules, electrically isolated
Input/output (I/O) modules
6-63
6
The diagram shows a typical wiring layout for:
●voltage inputs with the PCD2.W305 and .W325 modules or
● currentinputsforthePCD2.W315module
●If shielded cables are used, the shield should be continued to an external earthing
bar.
max. 20cm
E0E1E2E3E4E5E6
COMCOMCOMCOMCOMCOMCOM
012345678910111213
Earthing bar
Block diagram
Input filter
E0
COM
E1
COM
E2
COM
E3
COM
E4
COM
E5
COM
E6
COM
Multiplexer
ADC
Reference
Voltage 2.5V
μController
PCD Bus
I/O Bus
DC / DC
Converter
Galvanically
separate
interface
Electrically isolation
VCC
COM
+5 V GND