Hello everyone.. I'm new to CCTV  Thank you for having me. 
My question is for  
EverFocus-EZ550  camera 
If anyone can Please..  Thanks in advance. 
I have to ask, because I read the manual and still not how to power this camera, There's PE, N, and L ports for power, PE is ground.. Not sure what N and L is, the manual say power in. and to only use N and L for the 24volt model.. is one of the Neg and the other Pos?  
  
Another question I have is about PVD video Balun, they have a BNC connector and a ac-adapter jack.  
Do these balun need to have power going into the ac jack for them to work? Or can I just use them for the BNC connector and just power the camera for the power connector on the camera? 
  
Thanks