Scttlttl
Member
- Location
- Memphis, TN, USA
Need help and confirmation on a CCTV design...
My CCTV sales team was working with a manufacturer and submitted a design with a question...will it work?
The manufacturer replied "yes", but the system is not working correctly.
When I supply the details, you will quickly see why.
Giving the benefit of the doubt to the manufacturer, I do not think that they fully understood all of the factors assumed by sales.
We have 44 cameras on two property sites distributed on telephone poles, each pole anywhere from 500' up to 1,800' away from the head end.
The current design utilizes a poe extender (tx/rx) on each pole to send video over 100m.
Each pole has 2 -3 cameras. Dome camera specs are potential 11.5 w; Bullet camera specs potential 15w.
Our problem is under powering the cameras and most occurs where we have 3 cams (or even 2 cams if a bullet is involved).
ON the front end, the manufacturer instructed us to run an 18/2 to transport 48vdc to power their transmitter.
Cameras currently receive power only from one of 4 ports on the extender (supposed to provide 25w per channel).
However, manufacturer did not realize that when sales asked "will this work", that camera power was a factor - they were only thinking of transmitter power.
Sales assumed that the manufacturer was ok'ing whole power design.
On paper, even the transmitter power should not work (due to dc voltage drop), but I think in actuality, it does.
The problem is under powered cameras.
My solution is to run an additional 14/4 to each pole and shorten extremely long runs by utilizing a new head end location for half of the poles.
We would send 24vac over that 14/4to power cameras; then terminating to an output on a 24vac 4w power supply.
On poles with three cameras, two 11.5w domes would share one of the 14/2 pairs.
I have a drawing but cannot get the upload and attachment to work.
I can email.
In case you want the specs of the devices, we are using:
ADCI800F-B521 Bullet Cameras
ADCI800F-D021A Dome Cameras
EL4500U POE Extenders
48vdc 3amp power supply (over 18/2 aerial for poe transmitter)
P3AC24-8-4L 24vac 4w power supply (over 14/4 aerial for camera power)
All cable is aerial.
My CCTV sales team was working with a manufacturer and submitted a design with a question...will it work?
The manufacturer replied "yes", but the system is not working correctly.
When I supply the details, you will quickly see why.
Giving the benefit of the doubt to the manufacturer, I do not think that they fully understood all of the factors assumed by sales.
We have 44 cameras on two property sites distributed on telephone poles, each pole anywhere from 500' up to 1,800' away from the head end.
The current design utilizes a poe extender (tx/rx) on each pole to send video over 100m.
Each pole has 2 -3 cameras. Dome camera specs are potential 11.5 w; Bullet camera specs potential 15w.
Our problem is under powering the cameras and most occurs where we have 3 cams (or even 2 cams if a bullet is involved).
ON the front end, the manufacturer instructed us to run an 18/2 to transport 48vdc to power their transmitter.
Cameras currently receive power only from one of 4 ports on the extender (supposed to provide 25w per channel).
However, manufacturer did not realize that when sales asked "will this work", that camera power was a factor - they were only thinking of transmitter power.
Sales assumed that the manufacturer was ok'ing whole power design.
On paper, even the transmitter power should not work (due to dc voltage drop), but I think in actuality, it does.
The problem is under powered cameras.
My solution is to run an additional 14/4 to each pole and shorten extremely long runs by utilizing a new head end location for half of the poles.
We would send 24vac over that 14/4to power cameras; then terminating to an output on a 24vac 4w power supply.
On poles with three cameras, two 11.5w domes would share one of the 14/2 pairs.
I have a drawing but cannot get the upload and attachment to work.
I can email.
In case you want the specs of the devices, we are using:
ADCI800F-B521 Bullet Cameras
ADCI800F-D021A Dome Cameras
EL4500U POE Extenders
48vdc 3amp power supply (over 18/2 aerial for poe transmitter)
P3AC24-8-4L 24vac 4w power supply (over 14/4 aerial for camera power)
All cable is aerial.
