CBC V 0.1 - Manual (Page 11)

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(1) HDD : HDD is activated
(2) HDD FULL HDD is full
(3) ALARM When Alarm Enable : Yes (when alarm is triggered, the led is flashing)
(4) TIMER When Timer Enable : Yes
(5) PLAY Play operation
(6) REC Recording operation
3.3 Back panel connection
POWER
VIDEO OUT
VIDEO IN
ALARM
1. VIDEO IN
Connect to video source, such as quad, multiplexer, or camera.
2. VIDEO OUT
Connect to monitor, if no operation with quad or multiplexex, as Fig
Connect to video input of quad, multiplexer, as Fig.
3. External I/O : RS232 / Alarm input
Controlled remotely by an external device or control system.
Alarm input, external I/I explanation.
25 pin com port