Vivotek VS3100P - Manual (Page 10)

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relay switch for device control. Pin 1 and pin 2 can be connected to an external sensor
device and the state of voltage will be monitored from the initial state 'LOW'. The relay
switch of pin 3 and pin 4 can be used to turn on or off the external device.
Restore button
There is a button hidden in the box for restoring the system factory default settings.
Please refer to the appendix "Troubleshooting” for detail.
Power adapter
Connect the power jack of the included power adapter. Connecting the power adapter
should be the last operation while physically installing the Video Server.
Consult with the dealer of the peripherals for correct installation.