DVR4QA
- 6 -
GB
25-pin COM port
9-pin COM port
PIN 1: RS232-TX + PIN 2: RS232-RX:
This device can be controlled remotely by an external device or control
system, such as a control keyboard, using RS-232 serial communications signals.
PIN 3: ALARM INPUT 1:
By connecting ALARM INPUT 1 (pin 3) to GND (pin 9), the
DVR4QA
will start recording
and the buzzer will be on. Triggering depends on the set level (high/low) under Menu/Camera/Alarm.
PIN 4: ALARM INPUT 2:
By connecting ALARM INPUT 2 (pin 4) to GND (pin 9), the
DVR4QA
will start recording
and the buzzer will be on. Triggering depends on the set level (high/low) under Menu/Camera/Alarm.
PIN 5: ALARM INPUT 3:
By connecting ALARM INPUT 3 (pin 5) to GND (pin 9), the
DVR4QA
will start recording
and the buzzer will be on. Triggering depends on the set level (high/low) under Menu/Camera/Alarm.
PIN 6: ALARM INPUT 4:
By connecting ALARM INPUT 4 (pin 6) to GND (pin 9), the
DVR4QA
will start recording
and the buzzer will be on. Triggering depends on the set level (high/low) under Menu/Camera/Alarm.
PIN 7: EXTERNAL ALARM NC + PIN 8: EXT. ALARM NO:
During normal functioning COM is connected with NC
and not with NO. When there is an alarm trigger, COM disconnects from NC and connects with NO.
PIN 9: GND:
GROUND
PIN 10: RS485-B + PIN 11: RS485-A:
This device can be controlled remotely by an external device or control
system, such as a control keyboard, using RS-485 serial communications signals.
PIN 12: DISK FULL:
When the HDD is full, it sends a trigger signal to a possible next
DVR4QA
. Normally this signal
is high ; when the disk is full it becomes low.
PIN 13: REC START:
this pin allows recording triggering from an external device. Normally this signal is high. When
it becomes low, the device will start recording. When it becomes high again, the device will stop recording.
PIN 14: ALARM RESET:
An alarm can be disabled by connecting pin 14 to pin 9 (GND). An external signal to this
pin can reset both the alarm output signal and the internal buzzer. Normally this signal is high.
PIN 15: EXTERNAL ALARM COM:
During normal functioning COM is connected with NC and not with NO. When
there is an alarm trigger, COM disconnects from NC and connects with NO.