Connecting to the RS485 port
All the connectors marked GND are common.
Alarm Output connectors
NC/NO (Relay Alarm-
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. For further information please refer to the
Configuration & Operation Manual: Section Alarm-Out screen.
Alarm Reset Input connectors
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.
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 TX+/RX+ and TX-/RX- of the control system to the RX+/TX+ and RX-/TX-
(respectively) of the DVR. For further information please refer to the Configuration
& Operation Manual and the PTZ camera or remote keyboard manual for
configuring the RS485 connection.