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21 6 Keyboard Controller Keyboard Controller can be used to control PTZ cameras connected to the DVR and multiple DVR(s) simultaneously for effective system management. 6.1 System Connection 1) Firstly, make sure that you have following items ready for system setting. [Keyboard Controller, Junction Box and RS-485 Cable] 2) Open the top cover of junction box, and make sure that jumper is located at “RS485” position. 3) Connect the keyboard and junction box with RS-485 cable.
