Introduction
DVR User Manual
5
l
Alarm Connections
Some models may support this function. Take 16 CH alarm inputs and 1 CH alarm output for
example.
Alarm Input:
Alarm IN 1~16 are 16 CH alarm input interfaces. There are no type requirements for sensors.
NO type and NC type are both available.
The way to connect sensor and the device is as shown below:
The alarm input is an open/closed relay. If the input is not an open/closed relay, please refer to
the following connection diagram:
Alarm Output:
The way to connect alarm output device:
Pull out the green terminal blocks and loosen the screws in the alarm-out port. Then insert the
signal wires of the alarm output devices into the port of NO and COM separately. Finally,
tighten the screws. Provided that the external alarm output devices need power supply, you can
connect the power supply as per the following figures.
Introduction
DVR User Manual
6
l
RS485 Connection
There are two types of RS485 interfaces:
（
Type 1
）
（
Type 2
）
Type 1: The P/Z interfaces are used to connect speed dome. K/B interfaces are used to connect
keyboard.
Type 2: The RS485 interfaces are not only used to connect speed dome but also to connect
keyboard.
The way to connect speed dome to the DVR:
Type 1: Disconnect pluggable block from the RS485 terminal block and then loosen the screws
from the pluggable block, insert signal cables into Y and Z port separately (Y is TX+; Z is TX-)
and tighten the screws. Next, connect pluggable block back into terminal block. Finally,
connect the video cable of the speed dome to the video input interface of the DVR.
Type 2: Disconnect pluggable block from the RS485 terminal block and then loosen the screws
from the pluggable block, insert signal cables into A and B port separately (A is TX+; B is TX-)
and tighten the screws. Next, connect pluggable block back into terminal block. Finally,
connect the video cable of the speed dome to the video input interface of the DVR.
Note:
The pluggable block of some models may not be connected into the terminal block and you shall obtain it
from the accessories package.
