Revo RE8/16DVR1 - Manual (Page 12)

User’s Manual
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If you would like to connect your video source to another device, you can use the Loop BNC connectors.
NOTE: The Loop BNC connectors are auto terminated. Do NOT connect a cable to the Loop BNC unless it is
connected to a terminated device because it will cause poor quality video.
RS485 Port
Alarm Input/Output
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 make certain it is connected.
To disconnect a wire, press and hold the button above the wire and pull out the wire.
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 of electrical switches
for NC (Normally Closed) is above 2.4V and for NO (Normally Open) is below 0.3V, and should be stable at least 0.5
seconds to be detected. The voltage range of alarm input is from 0V to 5V. See Chapter 3 ─ Configuration for
configuring alarm input.
GND (Ground) : Connect the ground side of the Alarm input and/or alarm output to the GND connector.
NOTE: All the connectors marked GND are common.
NC/NO (Relay Alarm Outputs): The DVR can activate external devices such as buzzers or lights. Connect the device
to the C (Common) and NC (Normally Closed) or C and NO (Normally Open) connectors. NC/NO is a relay output
which sinks 2A@125VAC and 1A@30VDC. See Chapter 3 ─ Configuration for configuring alarm output.
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.
Network Port
CAUTION: The network connector is not designed to be connected directly with cable or wire
intended for outdoor use.
RS232C 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 RX+/TX+ and RX-/TX- of the control system to the +
and – (respectively) of the DVR. See Chapter 3 ─ Configuration and the PTZ camera or remote controller
manufacture’s manual for configuring the RS485 connection.
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.
An RS232 port is provided to connect a remote control keyboard.