JVC VR-N900U Startup Manual page 17

Rear I/O Terminals
12
Input ports
1
[ALARM IN 1 to 4] terminals
Alarm recording is activated when signals are input to
these terminals.
2
[EMERGENCY] terminal
Recording is activated in all cameras when a signal is
input to this terminal.
* Recording will not be started in cameras to which no
video signal is being input.
3
[ALARM RESET] terminal
Output from the alarm output terminal is stopped when a
signal is input during alarm terminal output.
4
[EXT REC IN] terminal
Recording in all cameras is started or stopped by an
external signal.
* Recording will not be started in cameras to which no
video signal is being input.
5
[OPE ON/OFF] terminal
Switches between OPERATE on or off when a signal is input.
Output ports
6
[COMMON] terminal
The common grounding terminal. Connected to the
signal grounding terminal on the connected device.
(This can be used when there are insufficient common grounding terminals.)
1 2 4 6 8 10 11
3 5 7 9
7
[ALARM OUT] terminal
Outputs a signal when recording is started by an alarm.
8
[WARNING OUT] terminal
Outputs a signal when an operation abnormality or
other error occurs on the hard disk.
9
[REC TALLY] terminal
Outputs the recording status of the VR-N900U.
10
[OPTION OUT 1 & 2] terminals
Outputs a signal when an event is detected.
11
[COMMON] terminal
➏
Same as .
12
[SIGNAL GND] terminal
The common grounding terminal. Connected to the
signal grounding terminal on the connected device.
Note
• Do not use this terminal for protective earthing.
E-17