Installation
Document 800-03650
Rev D
27
02/09
Caution
The network connector is not designed to be connected directly
with cable or wire intended for outdoor use.
Connecting the RS485 Port
The DVR can be controlled remotely by an external device or control system, such as a
control keyboard, using RS485 half-duplex serial communications signals. The RS485
connector can also be used to control PTZ (pan, tilt, zoom) cameras. Connect the RX-/
TX- and RX+/TX+ of the control system to the TX-/RX- and TX+/RX+ (respectively) of
the DVR. See
and the PTZ camera or remote controller
manufacturer's manual for configuring the RS485 connection.
Figure 2-9
RS485 Port
Connecting Alarm Inputs and Outputs
Note
To make connections on the Alarm Connector Strip, press and
hold the button and insert the wire in the hole below the button.
After releasing the button, tug gently on the wire to ensure that it
is connected. To disconnect a wire, press and hold the button
above the wire and pull out the wire.
Figure 2-10
Alarm Input Connectors
AI 1 to 16
(Alarm-In)
You can use external devices to signal the DVR to react to events. Mechanical or
electrical switches can be wired to the AI (Alarm-In) and GND (Ground) connectors The
voltage range of the alarm input is from 0V to 5V. When the electrical switch is wired,
the threshold voltage for NC (Normally Closed) is above 2.4V and for NO (Normally
Open) is below 0.3V, and it should be stable at least 0.5 seconds to be detected. See
for configuring alarm input.
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