Vivotek IP2121 - Manual (Page 12)

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device is too far to allow accurate function, an external power source may be used to pull
high the RS485 signal.
Network Camera provides one digital input and one relay switch. Pin 1 and pin 2 can be
connected to external sensor and the state of voltage will be monitored according to the
programmed scripts in configuration. The relay switch can be used to turn on or off
external devices.
Restore button
There is a button hidden in the box for restoring the system factory default settings.
When the system fails to install or operates abnormally, use the included assistant stick
in the package and follow the following procedures to reset the system back to its
original status.
Poke the assistant stick into the hole to press down on the restore button. Restart the
system by unplugging and re-plugging the power jack. While keeping the button pressed,
the system will perform POST twice rather than the usual once, which can be observed
from the flashing LEDs. After the system flashes the LEDs for the second time, withdraw
the stick to release the button. The system will have restored factory default settings at
that moment.
Auto Iris Lens Connector
If the auto iris lens is used, AES on rear panel must be turned OFF. And you also have to
select VIDEO Drive or DC Drive lens by the switch.
The pin assignment of the auto iris lens connector is as follows:
VIDEO Drive DC Drive
Pin 1 Power
source Damp-
Pin 2 Video signal Damp+
Pin 3 Not used Driver+
Pin 4 Ground,
Shield Driver-