Clover HDV043 Instruction Manual page 19

RS-485 Connections
The RS-485 ports are used to connect external PTZ cameras to the DVR. There is single
available port with this DVR. External controllers may be used, however you will not have
the ability to control the PTZ cameras remotely if you do so.
There are single RS-485 communications ports, these ports are used to connect external PTZ
camera controllers.
Figure 9 PTZ and Keyboard in RS-485
Alarm Out
Connecting the alarm out:
Each alarm output can be controlled/switched by DVR unit and its application software.
Each device must be wired to C (Common) and NO (Normally Open) and 12V DC ground
voltage must be applied to the port.
Figure 10 Alarm Out
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