mrnoname

I have a cheap china cam. No excuses, I'm just cheap. It powers with a 5v wall wart power supply. Does not use PoE. I am using a set of PoE injectors to connect the power supply by the switch, inject the 5v into the network cable (stealing 2 pairs) and then using a PoE extractor (I guess is the name) to pull the power back out of the network cable and back to a typical DC barrel connector. I am using plenum rated cat6 wire with keystones for about a 20 ft. run. The power supply shows 5.2v when tested at the source and 5.2v when tested at the long end of the cable. However, the camera will power up, but when it tries to draw more power (presumably) to do the auto-check and re-center the PTZ, it stops functioning and appears to be in a low voltage condition. When I power the cam directly from the power supply, no cable rig up, it works fine. If I power it up with a shorter cable rig up (say 6 feet +/-) it works fine. I have troubleshot everything I could think of. Cam - functioning as expected. Tried another cam with same results. Power Supply - functioning... tried another supply with same results. Tested as 5.2v rated at 1000mA Cables - tested with network tester, all pairs are registering. (a cheap LED tester that check pair sequence and polarity, nothing fancy). PoE injector/extractor - functioning as expected. Pairs are not reversed. Steals two pairs for power, leaves two for network. Work fine on the shortened run. Tried another set of injector/extractor with same results. What could I be missing? It seems it could be a current draw issue. The PS is rated for 1000 mA. Should I try a 5v supply rated at a higher mA? I'm afraid to go to a higher volt rated PS, as I doubt the cams have adequate voltage regulators and I fear frying them with a 6 or 9 volt PS. Or, is there just not enough copper in a cat6 line to carry the current 20ft, so I need to get a higher rated cable? Ideas and thoughts appreciated. Thanks.

Regulator seems to have done the trick. I still had problems pushing 9v through the line and regulating it to 5v at the camera. But, pushing 12v seems to have done it. Thanks.

Thanks. I'll order some parts and give it a try.

Hey mike, Put me on the list for being interested in support for wanscam and sricam cameras. I am using a cotter branded mini nvr. Wanscam are jw 011 and older Sricam are ap001 Seems like an http stream would do the trick. Thank you!

Are there any updates to this thread? I have four Wanscam and 4 Sricam that will not connect to the NVR. I'm hopeful someone has an update or instructions to help. Thanks.