- The Passive Y Injector receives DC power on the 2.1mm DC Barrel and routes to both RJ45 Connectors on pins 4/5(+) and 7/8(-). - It provides POE power and data on both the RJ45 connectors. - The Y Injector is used for those applications where customer needs to route POE power to two connected devices from a DC source like a battery or grid connected power supply.