CP Plus CP-UNC-VC41L5C-VMDS-V2 Quick Start Manual page 7

No
5
For more information about I/O port, see Table 1-2.
Port
Alarm
I/O
1.2 Connecting Alarm Input/Output
The camera can connect to external alarm input/output devices through digital input/output.
Alarm input/output is available on select models.
Step 1
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.
Step 2 Connect alarm output device to the alarm output end of the I/O port. The alarm output is open-drain output.
● Alarm output: alarm output is OD door, it needs to add pull-up resistor externally (Typical value 10 KΩ) to make
it work normally. The output signal is high level by default (external pull-up voltage) after adding external pull-
up resistor; the output signal becomes low level when there is alarm output.
• The operating current of alarm output port is recommended to be less than 10mA. The max current which is used
to drive external circuit is 80mA, it is recommended to add relay externally when it is beyond the value
Name Description
Inputs 12V DC power. Please be sure to supply power as
12V DC power
input
Port Name
ALARM_OUT
ALARM_IN
ALARM_GND
Connect the alarm input device to the alarm input end of the I/O port.
instructed in the Guide.
Device abnormity or damage could occur if
power is not
supplied
correctly.
Table 1-2 Alarm information
Description
Outputs alarm signal to alarm device.
Receives the switch signal of external alarm source.
Ground connection.
Figure 1-2 Alarm input
Figure 1-3 Alarm output