CP Plus ORANGE CP-UNC-VB21L3C-MDS Quick Start Manual page 9

5 12V DC power input
For more information about I/O port, see Table 1-2.
Port Port Name
ALARM_OUT
ALARM_IN
Alarm I/O
ALARM_GND Ground connection.
1.2 Connecting Alarm Input/output
Alarm input/output is available on select models.
Step 1 Connect alarm input device to the alarm input end of the I/O port, see Figure 1-2. 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 connecting to +3V to +5V or idling.
collects logic "0" when input signal being grounded.
Step 2 Connect alarm output device to the alarm output end of the I/O port. The alarm output is
the open-collector output.
Alarm output: alarm output is OD door, it needs to add pull-up resistor externally (Typical value 10K
Ω) to make it work normally. The output signal is high level by default (external pull-
Inputs 12V DC power. Please be sure to supply power as
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.
Figure 1-2 Alarm input
Device
Introduction 9