Planet DVR-1650 User Manual page 23

3) SENSOR TYPE: NONE/ N.O/ N.C
DVR can select the input type for external alarm relay which usually has normal open or normal closeusing
LEFT or RIGHT button.
4) ALARM INPUT (Relay TRIGGER Out):
DVR supports both dry open and dry contact through relay output port 1 to port 4.
It can be selected using LEFT or RIGHT button. Trigger Output 1 to 4 corresponding to
alarm input from 01 to 16 can separately be designated. For example, trigger output
for alarm input 01 can be designated as " DISABLE"(when trigger output isn't needed).
Trigger output for alarm input 02 can be designated as "trigger output 1". Trigger output
for alarm input 10 can be designated as "trigger output 3". Trigger output for alarm
input 16 can be designated as "trigger output 4".
5) BUZZER ALERT: DISABLE/ ENABLE
If external alarm sensor(s) be triggered, beep sound from buzzer would be occurred during two seconds
while choosing ENABLE
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