The Cisco Aironet Power Injector provides both power and data to a connected access point or bridge. The device serves the following functions:
•It provides Category 5 Ethernet media to the access point or bridge.
•It uses the unused wires in an Ethernet cable to supply inline 48-VDC power to an access point or bridge.
The question was:
if it means max distance from switch to AP is 200m (600ft),because there is 100m between power injector & AP,and 100m between power injector & switch?
Not sure where this is going ... but you can not exceed 100 meters regardless if you use an injector. The injector has the same 100 meter limitations.