IR/Night mode issues

[BB12]

Looking for some help.

I've just installed an 8 channel HIKVISION DVR with x 8 Govision cameras. Cable used is CAT5 and rj45 baluns to connect each end. All cameras are working and crystal clear in the daytime. When it comes to switching over to IR only 5 cameras are working. The others are staying in day mode so the images at night are completely black. I've made sure IR is switched on in the PTZ for all cameras. Settings as far as I'm aware are all good.

Original power supply supplied in the kit was 5A with an 8 way splitter - was only getting 2 cameras working from this. I've actually now installed 4x separate power supplies with 2 cameras on each supply, which has now given me 5 that are working. Longest run is 30-40m

Each camera does change to IR when covered. (Can hear the click over).

I've also had all 8 cameras working correctly depending on which power supply they are plugged into. Surely 8 cameras should not need 4 x power supplies and still not have 3 working? Its driving me crazy. I'm now presuming I should change all the cabling to the RG59 supplied with the kit.

Does anybody have any idea what the issue could be?

 

[brains-lans]

Im only DIY but have several installs under my belt:

Can you run a local power supply to one of the non-switching from 'day to IR mode' cameras for one night to test it does then switch?

If not it may be down to ambient light being too high, can this camera be adjusted, I'm not familiar with them?

Other options are that the camera cant get the current required to power the IR LEDs so isn't switching or is and rebooting, have you doubled up the power wire pairs, whats a multimeter say the voltage drop from the original 12v DC?

Power wise if your using baluns id have gone for a larger Amp PSU and quick blow fuses per camera.

Im betting voltage drop or faulty camera.

Brian

 

[telectrix]

i'd suspect volt drop to be the culprit. can you measure the voltage (after dark) at the cameras that won't switch.

 

[Octopus]

I would go back to the supplier and see what they say ....

 

[littlespark]

Voltage drop. Get bigger PSU's (bigger in amps, not voltage). There's not enough power for the IR illuination
Seen this happen before.

 

[BB12]

Hi,

Still having a nightmare with this. I’ve now supplied each camera locally with a separate 5A power supply per camera.

Removed the CAT5 and installed pre terminated BNC cable. Still the same.

A couple won’t switch to night mode, a couple do then won’t change back to day mode when it gets light.

I’ve now noticed as soon as I unplug the cameras and plug them back in they instantly switch to the correct mode.

I’m at a massive loss with it all. Do you think the cameras in question could be sticking until de-energised?

 

[BB12]

Voltage drop. Get bigger PSU's (bigger in amps, not voltage). There's not enough power for the IR illuination
Seen this happen before.

All cameras are illuminated wit the IR LEDs. Just not switching to Nightmode on the screen completely black.

 

[gutterball]

Could it be because you have a Hikvision DVR and Govision cameras?