fixitbaz

Hi I have a Ademco AHDR9 DVDR and have 6 fixed cameras plugged into it they are all working fine. I am interested in setting up a PTZ dome on the DVDR but unsure on the wire connections for the RS485 on the back of the unit. It has 4 terminals marked up as follows RX+ RX- TX+ TX- The camera I am trying to connect only has RS485 +,- Do I connect the RX+ & TX+ of the DVDR to the RS485 + of the camera RX- & TX- of the DVDR to the RS485 - of the camera Also would I be able to use a 8 core screened alarm cable to carry the RS485 signal and video between the DVDR and camera. or would I need to run a new cat 5 twised pair cable????? Any help would be great as I am new to all this. Cheers Barry

Is there anyway in checking the RS485 outputs on the back of the DVDR as I have connected it to the PTZ unit but it does nothing. The PTZ unit is one of the middle east units that are listed on fleabay everwhere I was given this unit so if this works the better for me. It might be this unit is faulty but before buying a better unit is there anyway in checking the DVDR outputs Cheers Barry

Thanks for your help one more bit of info please Is there anyway in checking the RS485 outputs on the back of the DVDR as I have connected it to the PTZ unit but it does nothing. The PTZ unit is one of the middle east units that are listed on fleabay everwhere I was given this unit so if this works the better for me. It might be this unit faulty but before buying a better unit is there anyway in checking the DVDR outputs Cheers Barry