macklington

Hi everyone, I'm helping a family member out replacing a bunch of analog cctv cameras across 2 x HIKVISION DVRs totalling 16 cameras distributed across 2 floors of a building. Thus far, wiring every single camera upstairs has been faultless, the system comes back up with the new cameras ready to go, no worries at all. The cameras located downstairs are a different story, the 3 cameras I wired downstairs tonight would not work when rewired with the new cameras and DC power connectors. I have tested all 3 cameras on connections upstairs, so the cameras definitely work. I believe it's some sort of an interference issue, but as someone with an IP-based background working with wireless networks, PCs etc, this is definitely not my area of expertise. The only physical difference I can determine between the wiring of the old and new cameras are these magnet things that are wound on and heatshrunk onto the cctv camera's BNC and 12v DC connectors. Images below (apologies for bad angle): The new camera wiring is on the left, with BNC, 12v and a switch for cycling through transmission formats, and the very old camera on the right with power and BNC. So, this is where I'm at. I'm obviously missing something. Could any of you kind people please point me in the right direction? Is there some sort of inline connector I can get for the DC power and BNC connectors to solve this issue? I've searched around and I thought a BNC ground loop isolator such as the one linked below might help? Thank you in advance, I'm scratching my head here in frustration, and every minute they're not up and running the business' security is a worry for me. Cheers, macklington

Hi tomcctv, I've managed to successfully reconnect the old cameras on 2 of the 3 points being replaced and they power back up and work, the third one did not come back up. I was concerned I may have tripped something, or blown a fuse in the process of the changeover, but this is a shot of the current state of the DC power supplies, and they're green across the board: I will report back with results after the replacement PSU goes in tomorrow night. Thanks again to Sir Lenscelot and thanks tom for your input. Cheers, macklington

Total of 16 analog cameras on the system. It has no IP cameras, they are connected to the other DVR. At least 3 or 4 of the other cameras I have replaced are identical to the cameras I am asking about in this thread. Forgive me, I understand your need to have a full accounting of the system, but I feel like we're getting a bit away from the original problem here of the cameras not appearing to get power.

That's correct yes. It has 14 other hikvision cameras similar to the new model, and has previously run on all Samsung cameras, and they've been gradually phased out as their image quality has diminished.

Hi Sir Lenscelot, I've managed to get the DVR and camera information: DVR 1: LTD8516K-ST DVR 2: DS-7732NI-SP Old camera - Samsung SID-450P - 12v 2.5w New camera - DS-2CE56D0T-IRPF - 12v 4w MAX I have only green lights across the board on the 12v PSU, it isn't reporting any shorts or blown fuses. I have a friend bringing in a temporary power supply to test with during the week, I will report back with results. Sorry I can't go into any more detail in this post, I'm in a rush! Cheers, macklington

Thank you very much for the reply Sir Lenscelot, I'll do my best with the knowledge I have to answer your Q's: The Hikvision DVR is compatible, running TVI (I'm 99% sure), identical cameras have been wired and connected to the same DVR upstairs without this same issue. Wiring is 2 x 10-channel wall-mounted 12v DC injectors behind the server rack running power to all analog cameras, with coaxial wiring terminated with BNC connectors for the video signal. There is no Cat-5 wiring in this installation (which I think is around 12 years old). Ageing but still functional analog cameras were connected to these cables prior to the installation of the new cameras, so I can assume that the coax and BNC connectors are setup correctly, and that 12v power is at least running to the end of the cable, which I have terminated with brand new 12v male DC connectors as below: I have attempted to get an image out of the camera in its installed location, but the new cameras do not appear to get power. With the cameras upstairs, as soon as the 12v power supply is turned on behind the rack, you can hear a faint but audible click in the internals of a camera when it powers up. I do not hear that noise with the cameras downstairs when they are powered up. I didn't have a multimeter with me onsite as I'm usually called in for more PC-related issues which don't require that level of testing. Unfortunately I'm not in a position to relocate the DVRs out of their rack and down to the location for testing. I hope this info assists in narrowing down the problem, I can attend onsite in about 18 hours for another look to provide specs on the DVR and cameras, but my limited experience tells me this is more likely power-related than anything else. Thanks again for your reply, macklington