Digital Video Recorder
5
Connecting Audio
NOTE: It is the user’s responsibility to determine if local laws and regulations permit recording
audio.
Figure 7 — Audio In and Out connectors.
Your DVR can record audio. Connect the audio source to Audio In. Connect
Audio Out
to your
amplifier.
NOTE: The DVR does not have amplified audio output, so you will need a speaker with an
amplifier. The audio input can be from an amplified source or directly from a microphone.
Connecting Alarms
Figure 8 — Alarm Input/Output and RS485 connector.
Figure 9 — Alarm Input/Output board and alarm connector strips.
An
Alarm I/O
port (DB-25 male connector) is provided to connect the alarm inputs and alarm outputs.
Connect the wires to connectors on the
Alarm I/O
board (supplied with the unit), and then connect the
board to the
Alarm I/O
port.
CAUTION: Do not attempt to wire directly to the DB-25 male connector.
NOTE: The Alarm I/O Board consists of alarm connector strips and RS485 connector.
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 threshold voltage is 4.3V and should
be stable at least 0.5 seconds to be detected. See
Chapter 3 — Configuration
for configuring alarm input.
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