User’s Manual
4
Alarm In 1 to 8
: You can use external devices to signal the DVR to react to events. Mechanical or electrical switches
can be wired to the
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.
NO (Normally Open):
Connect the device to the
COM
and
NO
(Normally Open) connector. NO is a relay output
which sinks 1A@30VDC. See
Chapter 3
─
Configuration
for configuring alarm output.
Connector Pin Outs:
Alarm In (1 to 8)
Alarm Inputs 1 to 8
GND
Chassis Ground
COM
Relay Common
NO
Relay Alarm Out (Normally Open)
RS485 Port
Connector Pin Outs:
Master Unit
Slave Unit
+
→
To
→
TX+/RX+
–
→
To
→
TX–/RX–
RS232 Port
Connector Pin Outs:
Master Unit
Slave Unit
RX
→
To
→
TXD
TX
→
To
→
RXD
GND
→
To
→
GND
NOTE: Refer to the following for pin-out details for the 9-pin connector of the slave unit.
Male
Female
Pin 2
RXD (Receive Data)
Pin 3
TXD (Transmit Data)
Pin 5
GND (Ground)
Network Port
CAUTION: The network connector is not designed to be connected directly with cable or wire
intended for outdoor use.
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.
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.
The DVR can be networked using the 10Mb/100Mb/1Gb
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.
Summary of Contents for DLR-2104/1.0TBV
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