Swann 4 CH Digital Video Recorder User Manual
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PIN 1. RS232-TX : RS-232
DVR can be controlled remotely by an external device or control system, such as a control keyboard, using RS-
232 serial communications signals.
PIN 2. RS232-RX : RS-232
DVR can be controlled remotely by an external device or control system, such as a control keyboard, using RS-
232 serial communications signals.
PIN 3, 4, 5, 6 ALARM INPUT
To connect wire from ALARM INPUT (PIN 3, 4, 5, 6) to GND ( PIN 9 ) connector, DVR will start recording and
buzzer will be on. When alarm has been triggered, signal becomes “Low”, and it will stop all alarm activities.
Under normal operation, signal remains “High”.
PIN 7. EXTERNAL ALARM NC
Under normal operation COM connect with NC and disconnect with NO. But when alarm triggered, COM
disconnect with NC, and connect with NO.
PIN 8. EXTERNAL ALARM NO
Under normal operation, COM will disconnect from NO. But when Alarm triggered, COM will connect with NO.
PIN 9. GND
GROUND
PIN 10. RS485-B
DVR can be controlled remotely by an external device or control system, such as a control keyboard, using
RS485 serial communications signals.
PIN 11. RS485-A
DVR can be controlled remotely by an external device or control system, such as a control keyboard, using
RS485 serial communications signals.
PIN 12. DISK FULL (OUTPUT)
When HDD is full, it sends a signal to trigger next DVR record mode, if you install another DVR. Under normal
operation, the signal remains “High”. But when disk full, DVR will send the “Low” signal.
PIN 14. ALARM RESET (INPUT)
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
Under normal operation COM connect with NC and disconnect with NO. But when alarm triggered, COM
disconnect with NC, and connect with NO.