S
Spearmint
Any CCTV masters around tonight?!
We're on a site at the moment finalising a CCTV setup consisting of five PTZ cameras from ESP with the video/data and power being supplied through CAT5e (one per camera) and a control cable (RS485) parallel connecting the cameras to a controller also from ESP. Cameras 1 > 4 work fine but the moment you connect the RS485 cable to the final camera you cannot control cameras 3 > 5! The first two cameras can still be controlled however. The video is fine but you cannot move them with the controller or access the OSD. Even the video coming back from the final camera is fine... removing the control cable from the fifth camera restores the control to the others.
It almost sounds like the total resistance of the control cable is too high when bringing the final camera into play but one of the others has tried linking out the control cable between cameras 4 +5 with a bigger CSA to no avail.
It makes no sense!
We're on a site at the moment finalising a CCTV setup consisting of five PTZ cameras from ESP with the video/data and power being supplied through CAT5e (one per camera) and a control cable (RS485) parallel connecting the cameras to a controller also from ESP. Cameras 1 > 4 work fine but the moment you connect the RS485 cable to the final camera you cannot control cameras 3 > 5! The first two cameras can still be controlled however. The video is fine but you cannot move them with the controller or access the OSD. Even the video coming back from the final camera is fine... removing the control cable from the fifth camera restores the control to the others.
It almost sounds like the total resistance of the control cable is too high when bringing the final camera into play but one of the others has tried linking out the control cable between cameras 4 +5 with a bigger CSA to no avail.
It makes no sense!