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ALARM IN
ALARM OUT
RECORD IN GROUND
DISK FULL
ALARM RESET
NO CONNECTION NO CONNECTION
SWITCH OUT
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1.4 ALARM In / Out
The above figure is a rear view.
1. GND: Ground Contact.
2. ALARM OUT (OUTPUT): This is an
alarm-output trigger. Connect this to
external devices such as buzzers or
lights.
5V
0V(Active)
3. DISK FULL (OUTPUT): This is a disk-full
output trigger. Connect this to external
devices such as buzzers or lights.
5V
0V(Active)
4. ALARM RESET (INPUT): This pin
connects to an alarm-clear device for
clearing an alarm.
5V
0V(Active)
5. RECORD IN (INPUT): This pin connects
to a record-triggering device for starting a
record.
5V
0V(Active)
6. SWITCH OUT (OUTPUT): This pin,
sending out timing signals (falling /
negative) to a multiplexer, connects to a
multiplexer’s trigger terminal so the
multiplexer can switch to using the same
recording speed as the DVR.
7. NO CONNECTION
8. NO CONNECTION
9. ALARM IN (INPUT): This is an alarm input,
which can be programmed in the menu
system to Normally Open or Normally
Closed.
5V
0V(Active)