HRTL-One Digital Video Recorder User Guide

 

 

Table 2-3

9-Pin COM Port Pinouts

 

 

 

 

Pin

Type

Function

 

 

 

 

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.

Rev 1.00

13

Document 900.0259

 

 

10/04