Digital Video Recorder
7
ARI (Alarm Reset In)
An external signal to the
Alarm Reset In
can be used to reset both the Alarm Out signal and the
DVR’s internal buzzer. Mechanical or electrical switches can be wired to the
ARI
(Alarm Reset
In) and
GND
(Ground) connectors. The threshold voltage is below 0.3V and should be stable at
least 0.5 seconds to be detected. Connect the wires to the
ARI
(Alarm Reset In) and
GND
(Ground) connectors.
Connecting to RS485
Figure 10 — RS485 connector.
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
RX+
and
TX+
of the control
system to the
RX+
/
TX+
of the DVR, and
RX-
and
TX-
to the
RX-/TX-
. See
Chapter 3 —
Configuration
and the PTZ camera manufacture’s manual for configuring the RS485
connection.
Connecting to the Network Port
Figure 11 — Network connector.
The DVR can be networked using the 10/100Mb Ethernet connector. Connect a Cat5 cable
with an RJ-45 jack to the DVR connector. The DVR can be networked with a computer for
remote monitoring, searching, configuration and software upgrades. See
Chapter 3 —
Configuration
for configuring the Ethernet connections.
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