In PLC circuits, what does "sourcing" refer to?

In the context of PLC circuits, "sourcing" specifically refers to providing power to the load. This means that a sourcing output will supply voltage to the connected load when activated. In a sourcing configuration, the PLC output connects to the positive side of the power supply, allowing current to flow from the power source through the load and completing the circuit. This is essential for applications where the control device needs to energize a load, such as a relay or a motor, thereby allowing the load to operate.

Understanding sourcing is important for the configuration of circuit elements, as it directly affects how devices are wired and how they function within the larger control system. In contrast, other concepts such as providing a ground path or disconnecting the power supply do not align with the definition of sourcing, which focuses solely on the provision of power to enable device operation.