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12
2.3 Terminal Block
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ALM.IN
GND
ALM.RST
REC
GND
FULL
ALM.OUT
GND
SW.OUT
1. ALM IN: (INPUT)
This is an alarm input, which can be programmed in the menu system to Normally Open or Normally
Closed. (Active low, 5V)
2. GND:
Ground Contact.
3. ALM RST: (INPUT)
This terminal connects to an alarm-clear device for clearing the alarm. (Active low, 5V)
4. REC: (INPUT)
This terminal connects an external switch to turn the recording function of the DVR on/off. (Active low,
5V)
5. GND:
Ground Contact.
6. FULL: (OUTPUT)
This terminal sends out the full-disk signal. (Active low, 5V)
7. ALM OUT: (OUTPUT)
This is an alarm output relay. Connect this to an external device like buzzers or lights. (Active low,
5V)
8. GND:
Ground Contact.
9. SW OUT: (OUTPUT)
This terminal, sending out the timing signal (falling/negative) to a multiplexer. Connect this terminal
to a multiplexer’s trigger terminal so that the multiplexer can switch to use the same recording speed
as the DVR.