Two of my cameras have PTZ control with the usual RS485 signalling. I wired them with twisted pairs, and they work properly using 9.6kbps signalling.
I am going to upgrade two other cameras, with PTZ control. They are about 30m and 40m from the DVR, and to install new twisted pairs to them would mean a lot of work. I do however have unused pairs on existing 8-core alarm cables going to each of these locations, so it would be very convenient to use them. These are not twisted pairs as specified for RS485.
Does anyone have experience of running RS485 over conventional alarm wiring, or have any comments?
I am going to upgrade two other cameras, with PTZ control. They are about 30m and 40m from the DVR, and to install new twisted pairs to them would mean a lot of work. I do however have unused pairs on existing 8-core alarm cables going to each of these locations, so it would be very convenient to use them. These are not twisted pairs as specified for RS485.
Does anyone have experience of running RS485 over conventional alarm wiring, or have any comments?