Maxtor CDR-04S - Manual (Page 23)

PIN 1. GND
GROUND
PIN 4, 5, 17, 18 ALARM INPUT
To connect wire from ALARM INPUT (PIN 4, 5, 17, 18) to GND ( PIN 1 ) 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 2, 3, 6, 7, 8, 9, 10 PIN OFF
PIN 11. RS232-TX
DVR can be controlled remotely by an external device or control system, such as a control keyboard, using
RS-232 serial communications signals.
PIN 12. 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 13. EXTERNAL ALARM NO
Under normal operation, COM will disconnect from NO. But when Alarm triggered, COM will connect with NO.
PIN 14, 15, 16, 19, 20, 21, 22 PIN OFF
PIN 23. RS232-RX
DVR can be controlled remotely by an external device or control system, such as a control keyboard, using
RS-232 serial communications signals.
PIN 24. 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 25. EXTERNAL ALARM COM
Under normal operation COM disconnect with NO. But when alarm triggered, COM connect with NO.
22