11
other USB 2.0 connector to USB 2.0 compatible device, such as USB 2.0
disk drive, DVD+RW, USB 3G dongle, etc.
9.
RS-485 Connector (Optional)
Connect this connector to RS-485 compatible PTZ camera(s) or keyboard.
Please refer to the manuals come with the RS-485 compatible devices for
the correct settings. Please refer to
Appendix C
for the Keyboard Control
Protocol for the digital video recorder.
10.
Alarm Input/Output Connectors (ALARM IN 1-2, ALARM OUT
NC(1)/NO(2), Optional)
Connect the input connectors to external devices such as sensors or door
switches, and connect NC connector (left) to Normally Closed (NC) alarm
output, or NO connector (right) to Normally Open (NO) alarm output.
Please note that only one of the NC or NO connectors can be
connected only.
11.
Power Cord Inlet (DC 12V)
Connect to DC +12V power source.