Multiplex Technology 8CH - Manual (Page 55)

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PIN 1. RS232 RS232 - - TX TX
DVR can be controlled remotely by the keyboard of PC,
using RS-232 serial communications signals.
PIN 2. RS232 RS232 - - RX RX
DVR can be controlled remotely by the keyboard of PC,
using RS-232 serial communications signals.
PIN 3. ~ PIN 5. ALARM INPUT ALARM INPUT
To connect wire from ALARM INPUT ( PIN 3 -- 5 ) to GND ( PIN 9 ) connector,
DVR will start recording and buzzer will be on.
When Menu/ Camera/ Alarm is set up to “Low” : When alarm input signal is “ Low ”, the unit starts to
record and buzzer.
When Menu/ Camera/ Alarm is set up to “High” : When alarm input signal is “ High ”, the unit starts to
record and buzzer.
PIN 7. EXTERNAL ALARM NC EXTERNAL ALARM NC
Under normal operation COM connect with NC and disconnect from NO. But when alarm is triggered,
COM disconnect with NC, and connect with NO.
Attention: Voltage restrictions is under AV/DC 30V.
PIN 8. EXTERNAL ALARM NO. EXTERNAL ALARM NO.
Under normal operation COM disconnect with NO. But when Alarm triggered, COM connect with NO.
Attention: Voltage restrictions is under AV/DC 30V.
PIN 9. GND GND
Signal GND.
PIN 10. RS485 RS485 - - B B
DVR can be controlled remotely by the keyboard of PC,
using RS-485 serial communications signals.
PIN 11. RS485 RS485 - - A A
DVR can be controlled remotely by the keyboard of PC,
using RS-485 serial communications signals.
PIN 12, 13. PIN OFF PIN OFF
PIN 14. ALARM RESET ALARM RESET
To connect wire from ALARM RESET ( PIN 14 ) to GND ( PIN 9 ) connector, it can disable ALARM. An
external signal to
ALARM RESET ( PIN 14 ) can be used to reset both ALARM OUTPUT signal and DVR’s internal
buzzer. When alarm has been triggered, signal becomes “Low”, and it will stop all alarm activities.
Under normal operation, signal remains “High”.
PIN 15. EXTERNAL ALARM COM EXTERNAL ALARM COM
Under normal operation COM disconnect with NO. But when alarm triggered, COM connect with NO.
Attention: Voltage restrictions is under AV/DC 30V.
PIN 16, 17. GND GND
Earth GND
4CH