A splitter is a device that is the opposite direction of the Injector. It has two output cables: one supplies data and the other power. It is used to deploy remote non-PoE devices with no nearby AC outlets.
A PoE splitter
allows a non-compliant device to upgrade to PoE. By plugging into the network connection, it can pull power, and convert it into low-voltage ranges as required.
The difference between the injector and separator is that the PoE injector delivers power to a PoE device receiving data through an existing non-PoE switch. The splitter also provides power, but it does so by separating the power from the data and feeding it into separate inputs that can be used by non-PoE compatible devices.