1. Connect the side of the camera's RS485 to the port of DVR‘s RS485 with cable. Please pay attention to the positive and negative.
Applies to: DH81NK/DH41NK/DM21O/DM31O/DL81A/DH81S/DH81NG/DN81NB/DM41G/DN41CJ/DN81BJ/DN61EC/DG81W/DG61X/DG41T/DT81DQ/DT41DC/DT61ER/DG41BE/DG81BE
2. Enable PTZ function.
3. Please go to DVR‘s setting to set up PTZ. For example, if the model of the camera is C61H, the protocol should be PELCO-D and Baudrate should be 2400