KMtronic

Hi, We are small company who specialize in PC controlled relay boards. Several times we receive questions from CCTV users (or installers) about relay board that can be connected to DVR RS485 and controlled using PTZ buttons. Questions like: "Can this item be connected to a CCTV DVR and controlled via RS-485 to open/close garage roller door? Gates? etc? " I am not very familiar with CCTV but found from a friend one DVR with RS485 Output for PTZ control. Because we have RS485 relay board using our protocol now I have re-write firmware to accept PELCO-D commands. First version control only one relay: UP button turn ON relay number 1 DOWN button turn OFF relay number 1 I need opinions how to connect Pelco-D commands with relays to be easy for use and understanding. Because relay board have 8 relays and total 16 commands (8 x ON + 8 x OFF). Using UP and DOWN buttons now I can control one relay. Second Relay connect to the same camera channel has to be LEFT/RIGHT? Or all to one channel? Or 4 relays to one channel and 4 relays to second channel? And I also want to make a simple android software for easy relay control throught DVR. So I need some advises from people who know and use DVR. Thank you