15
C.25 PIN D-Sub Interface connector is used for external alarm input. The alarm input
accepts
voltage free contact devices.
Alarm input pins : 1~16 to one side of the trigger devices contacts and the other side to
ground pins 20 or 21.
The connectors pin 22 connected to Alarm Reset. The Alarm Reset signal return connects
to ground pin (pin 20-21).
Alarm output is Relay Type, Pin 24 is Normal Close (N.C.) and Pin 25 is Normal Open
(N.O.) .These outputs can be used to control external devices.
D-SUB 25 PIN Interface Card Configuration
1-16 Alarm
Input
Terminals
17-19 N/A
20, 21
GND (Connecting to Ground, Alarm Input)
22 Alarm
Reset
23
Relay COM (Alarm Output)
24
Alarm output, N.C.
25
Alarm output, N.O.
Note:If any alarm is configured/ enabled, DVR will start recording as per the Alarm
Recording frame rate.
