Rev 3.01 8 Document 900.0399
08/08
SENSOR IN Connect to external sensor devices to signal the DVR to react to events.
Up to four sensors can be connected to the equipment sensors 1–4 which
are dedicated to Video channel 1–4 respectively. These inputs operate
with a simple On/Off function. normally open (NO) and ground connected
to input starts recording or normally close (NC) and ground connected to
input stops recording (see Recording Mode, page 14 to program sensor
recording).
You need to connect two wires to the Terminal block on the rear panel of
the HRDE4X4 to correctly setup a sensor input. Connect one ground wire
between the external device and to the terminal block G input on the
HRDE4x4 to ensure the ground reference voltage is identical. Connect the
other wire to the sensor input 1–4 connection on the terminal block to
trigger the record condition.
Whether the sensor contacts are Normally Open or Normally Closed
depends on the setting of NO (normally open) or NC (normally closed) in
the record screen (Rated load 0.5 A @ 30 VAC or 1 A @ 30 VDC).
Set to NO: The alarm output contacts close when triggered by the sensor
input.
Set to NC: The alarm output contacts open when triggered by the sensor
input.
SENSOR
OUT
An internal relay connects/closes the two connected external sensor
output terminals. The relay can be triggered to close the two sensor
connections by either motion or a sensor input, if enabled in the Recording
Setup menu. This can be used to turn on or off an external buzzer or light.
VIDEO IN Connect NTSC or PAL camera coaxial outputs (up to 4) to the BNC Video
In connectors.
Caution Do not mix NTSC and PAL cameras.
VIDEO OUT Connect to a monitor.
RS-232 For engineering use only.
Table 2-1 Rear Panel Connectors and Switches (Cont’d)
Feature Description
1GGGGOUT234
In 1
GND 1 GND 2 GND 3 GND 4
In 2 In 3 In 4
Sensor Input
Connections
SENSOR OUT
Inside HRDE4X4
External Sensor
connection
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