Alarm - Digital Watchdog VMAX A1 G4 DW-VA1G442T User Manual

41 | VMAX A1 G4™ DVR

4.3 Alarm

4.3.1. Sensor
Users can install multiple sensors on the system to get the pre and post-alarm recording and
intensive recording function as well.
On/Off
Turn on or turn off the sensor.
Cam
Select the associated camera.
Relay
Select the associated alarm output.
Relay contacts can stand up to 24V/1A. In case it is connected to the external
CAUTION
circuit which is over 24V/1A, it can cause a problem in the system.
Preset
Set a PTZ camera to move to a preset position when the sensor is triggered.
Dwell (post-alarm)
Set the recording period from when the sensor is activated. During this period, the selected
camera will record according to the record-setting. The recording stops and the alarm
output is turned off when the set period is completed.
Pre-Alarm
Set the recording period in seconds just before a sensor is activated. Input up to 5 seconds. The
pre-alarm recording mode is always continuous at the recording speed set in the RECORD
menu.
Type
Select the sensor type as N/O (Normal Open) or N/C (Normal Close). The circuit of a N/O
sensor type is usually open, and the activation of the sensor occurs at the time of close, and
the N/C type works the reverse way.
Check the setting of the sensor type (N/O or N/C). It is recommended to use the "dry
NOTE
contact type" while the "wet contact type" may cause damage to the system.