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NVR User Manual
Introduction
connect the power supply as per the following figures.
RS485 Connection
There are two types of RS485 interfaces:
（Type 1）
（Type 2）
Type 1: The P/Z interfaces are unavailable temporarily. K/B interfaces are used to connect
keyboard.
Type 2: The RS485 interfaces are used to connect keyboard. A is TX+; B is TX-.
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