Dahua Technology DH-IPC-HDEW Series Quick Start Manual page 17

No.
4
5
Port
Alarm I/O
2.3.2 Connecting the Alarm Cable
Alarm input/output is available on select models.
Procedure
Step 1 Connect alarm input device to the alarm input end of the I/O port.
Device collects different states of alarm input port when the input signal is idling and
being grounded.
Device collects logic "1" when input signal is connected to +3 V to +5 V or idling.
●
Device collects logic "0" when input signal is grounded.
●
Port name Description
Inputs 12 VDC power. Be sure to supply power as
instructed in the manual.
12 VDC power input
Device abnormity or damage might occur if power is
not supplied correctly.
Connects to sound pickups to receive audio signal, or
connect to speaker to output audio signal.
Audio input/output
Audio input/output is available on select models.
Table 2-3 Alarm information
Port Name
ALARM_IN
ALARM_GND
ALARM_OUT
ALARM_OUT_GND
10
Description
Receives the switch signal of external alarm
source.
Connect different alarm input devices to the
same ALARM_IN_GND port.
Outputs alarm signal to alarm device.
When connecting to alarm device, only the
ALARM_OUT port and ALARM_OUT_GND port
with the same number can be used together.
Quick Start Guide