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Digital Video Recorder
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 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. Connect the wires to the ARI (Alarm Reset In) and GND (Ground)
connectors.
Connecting to the RS485
Figure 12 — 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-/TX- and RX+/ TX+ of the
control system to the TX-/RX- and TX+/RX+ (respectively) of the DVR. See Chapter 3 —
Configuration and the PTZ camera or remote controller manufacture's manual for configuring
the RS485 connection.
Connecting to the Network Port
Figure 13 — 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.
Connecting to the Modem Port
Figure 14 — Modem connector.
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