Sinking and Sourcing:
- Sinking and sourcing are terms to describe a current flow relationship between field input and output devices in a control system and their power supply.
- Sourcing I/O circuits supply current to sinking field devices.
- Sinking I/O circuits receive current from sourcing field devices.
Sourcing Device with Sinking Input Module Circuit:
The field device is on the positive side of the power supply between the supply and the input terminal. When the field is activated it sources, current to input circuit .
Eg:
Sinking Device with Sourcing Input Module Circuit:
The field device is on the negative side of the power supply between the supply and the input terminal. When the field is activated it sinks, current to input circuit .
Eg:
Sinking Device with Sourcing Output Module Circuit:
The field device is on the negative side of the power supply between the supply and the output terminal. When the output is activated it sources, current to input circuit .
Eg:
Sourcing Device with Sinking Output Module Circuit:
The field device is on the positive side of the power supply between the supply and the output terminal. When the output is activated it sinks, current to input circuit .
For the full Schematic Overview please refer the diagram below:
2 comments:
plz check 2nd last diagram.
Wiring is done for output sinking but Output source module is written in block.
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