5 replies to this topic

[bm_99]

Hey people, got a few issue's on a cctv system

Basically on site is a 16-way dm bx2, with 2 internal vista pd's, 10 older vista internal domes, 4 newer internal domes (vfd4v9)

Only the newer internal domes have been added by me, everything else is as before locations and all

2 of the newer cams are direct swaps from the older ones, the other 2 new cams are in new locations with power being shared with other cams

PSU's on site are dantech ones - 4 x 1amp, and the new domes are 150m/a per cam, old domes are 100m/a per cam

Everything was working then got the call, 6 cams were not working, 3 older ones on same power, 3 newer ones on same power, checked fuses fine and when removing and adding the powers the voltage on the psu drops to 5-8v d/c, with none of those power wires connected voltage goes up to 11.9-12.2v d/c

Even on the newer cams the power cosumption should be 150x3 = 450m/a

no shorts on the wires either, but when i added another seperate stand alone, 12v d/c 5 amp psu with all 6 cams they started working fine

So does that mean the dantech psu has gone?

[alterEGO]

bm_99, on 08 August 2011 - 06:10 PM, said:

So does that mean the dantech psu has gone?

Yes, or the cameras are drawing more than you think. How old are PSU's?

Edited by alterEGO, 08 August 2011 - 11:35 PM.

[bm_99]

alterEGO, on 08 August 2011 - 11:35 PM, said:

Yes, or the cameras are drawing more than you think. How old are PSU's?

Possibly, but had a word with the technical team to ask for the power requirements and thats what they said, even they were confused lol

i think the psu's are about 4-5 years old,

[garsec]

the psus are u/s i have had many problems like this in the past, replace the psus and all should be ok

[bm_99]

garsec, on 09 August 2011 - 10:37 AM, said:

the psus are u/s i have had many problems like this in the past, replace the psus and all should be ok

u/s?? under stated

[sixwheeledbeast]

bm_99, on 09 August 2011 - 11:00 AM, said:

u/s?? under stated

No useless.

Have used them before.
Some of the 12V models die after short while, similar faults as you posted.

There could be a short to earth on the power?
A camera could be faulty dragging the PSU down?

But more likely the PSU is faulty (you can tell, due to you testing with a different PSU).