User manual

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1.5.4 RS485 Pin Definition
When connect PTZ camera through RS485 interface, please refer to the following pin definition to
connect the DVR and PTZ.
Number Pin DVR site PTZ site
21 TX+ RS485 TX+ signal RS485 RX+ signal
22 TX- RS485 TX- signal RS485 RX- signal
23 RX+ RS485 RX+ signal RS485 TX+ signal
24 RX- RS485 RX- signal RS485 TX- signal