Dahua NKB1000-E - Port Features; Power

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1.4 Port Features
 RS232 port can directly connect to device if there is RS232 port. The distance should be
within 10m.
 RS485 transmission distance is 1200 m（9600bps）, max 3000m actually.
 For network keyboard series, please connect to the network port to connect the DVR or the
network speed dome.
1.5 Power
The keyboard uses DC12V 2A, you can use the adapter included in the accessories bag.