An NPN or sinking output accepts voltage and sinks it to ground to complete the circuit. A PNP or sourcing output sources voltage and the external circuit sinks it to ground to complete the circuit. A sourcing circuit would be drawn as voltage->switch->load->ground. A sinking circuit would be drawn as Voltage->load->switch->ground. In these cases, the switch could be a transistor.
PNP is sourcing. NPN is sinking. You generally connect NPN to ground and your PLC(or any load)input. With PNP you connect to V+ and to your PLC. Your PLC (load) should have the same ground or V+. Sourcing (PNP) provides a path to +24DC generally. Sinking (NPN) provides a path to 0V DC.
spot sourcing introduction
DTL Sourcing
advantages of dual sourcing
A non-standard sourcing solution
Sinking and sourcing current refers to current going into and out of the MCU (respectively)
Direct sourcing is a service that provides clients with candidates at a lower cost, while promoting the client's own brand in the marketplace. This type of sourcing has become the top recruiting priority.
The Gartner company is one of the leading sourcing software companies of 2013. Gartner provides individual support and full upgrades for sourcing software.
Words
In-sourcing is using resources inside the company or country to do business, basically the opposite of outsiding.
The type of product sourcing used in Home Improvement stores depends on your region. Home Improvement stores in the Midwest are different from those in the Northeast and as such the sourcing is also.