Firmware User Manual
74
Digital I/O Ports
Digital input/output ports (select models only) are used to connect digital input (DI) and digital output
(DO) devices. DI is a trigger device like a switch or sensor (e.g. “panic button”), which when pressed or
triggered, notifies the camera to perform specific actions or the DO device to respond. DO’s can be
alarms or lights, etc.
The Digital I/O Ports page displays the number of available DI and DO ports on the camera, which varies
depending on camera model.
DI: To configure the digital input device, define the active level and trigger interval of the DI. The default
Active Level is “0”, which means the DI device remains inactive unless triggered. A good example is a
“panic button”, which always stays in inactive mode “0” until the button is pressed; when the button is
pressed, its active level becomes “1” which means the DI is triggered. Active level “1” returns back to “0”
(inactive mode) after the specified Interval. The Interval is the duration of time when the trigger remains
in active mode which is also the minimum time interval between the previous trigger and the next. For
example, if the interval is set to “5 seconds”, the DI will not respond if the “panic button” is pressed
within 3 seconds after the previous trigger. To issue another trigger, press the button after 5 seconds
from the previous trigger.
DO: To configure the digital output device, define the active level and response interval. The default
Active Level is “1”, which means the DO will turn to active mode and respond once triggered. The
duration of its response will last according to the set Interval. A good example is an alarm siren, wherein
the siren will start sounding only when it is triggered by an event or another device like a DI. The siren
will stop sounding once the set interval time elapsed.
After changing any of the items above, press Apply to save the changes. The Reset button undoes the
changes that had just been made but not yet applied or saved.
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