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Saturday, June 17, 2017

Concept of Sourcing and Sinking

Concept of sourcing and sinking:
·         Sourcing-Sourcing is a concept in which direction of flow of current from the PLC.

·         Sinking- Sinking is the concept in which direction of flow of current into the PLC.


Need of sourcing and sinking:
The knowledge of this concept is very important when we dealing with PLC because it directly influences the controller input and output.
SINKING= Common GND Line (-)
SOURCING = Common Voltage line (+)
*most commonly used DC module options in PLCs are: sinking for input and sourcing for output.
** AC PLC I/O Circuits can be either sinking or sourcing.


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