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HRTL-One Digital Video Recorder User Guide
Rev 1.00 13 Document 900.0259
10/04
P
13 Alarm reset When the wire from the Alarm reset (pin 13) is connected to Ground (pin 9)
connector, it can disable the HRTL-One alarm notification (buzzer and flashing LED).
An external signal to Alarm reset (pin 13) can be used to reset both the Alarm output
signal and the internal buzzer on the HRTL-One. When an alarm has been triggered,
the signal becomes Low and all alarm activities are stopped.
Under normal operation the signal remains High.
14 Alarm input When the wire from Alarm input (pin 14) is connected to ground (pin 9) connector,
the HRTL-One starts recording and the buzzer will be on.
Under normal operation, the signal remains High.
15 COM Under normal operation, COM connects with NC (pin 7) and disconnects with NO
(pin 8).
When an alarm is triggered, COM disconnects with NC and connects with NO.
Table 2-3 9-Pin COM Port Pinouts
Pin Type Function