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User's Manual
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 (Common) 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 and GND connectors.
Connector Pin Outs:
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 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.
Connector Pin Outs:
RS232 Port
An RS232 port is provided to connect remote control devices such as a control keyboard. PTZ cameras or
text-in devices can also be connected to the RS232 port. See Chapter 3 ─ Configuration and the PTZ camera,
text-in device or remote controller manufacturer's manual for configuring the RS232 connection.
Connector Pin Outs:
4
AI (1 to 16)
Alarm Inputs 1 to 16
GND
Chassis Ground
NC
Relay Alarm Out (Normally Closed)
C
Relay
Common
NO
Relay Alarm Out (Normally Open)
ARI
Alarm Reset In
Master Unit
→
+
To
→
–
To
Master Unit
→
RX
To
→
TX
To
→
GND
To
Slave Unit
→
TX+/RX+
→
TX–/RX–
Slave Unit
→
TXD
→
RXD
→
GND
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