Aposonic A-S1604R4 - Manual (Page 13)

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2.4 CAMERA & MONITOR LOOPING
Here recommend link cameras by sequence to avoid unexpected image broken, from CH1,
CH2, CH3, CH4…….
2.5 EXTERAL ALARM
There are three types of alarms that the system can be configured to handle. They are
Motion detection Alarm, External Alarm and Video Loss Alarm.
A. Motion detection Alarm and External Alarm:
When motion detection or External Alarm was triggered, there are 5 possible actions
will be taken.
a. Changes recording speed as alarm recording speed.
b. Monitor will display corresponding full screen alarm channel, it will switch
automatic mode to manual mode if buttons pressing activity occurred in 5 seconds.
c. Relays can be activated by motion detection or external alarm when turning on.
d. External alarm will be recorded in the event list. Motion detection can be set to yes
or no.
e. The camera title will be transformed into color of yellow when motion is happening,
“ALARM” text will show up when external alarm is triggered.
B. Video Loss Alarm:
The default setting of Video Loss alarm is enabled and cannot be changed. Although
buzzer action can be disabled, an ALM record will still be added to the Event List that
indicates the precise time of video loss.
C.25 PIN D-Sub connector is used for external alarm input. It will accept TTL/CMOS
type trigger signals where the 16ch DVR alarm inputs will be set by signal polarity. It
also accepts contact type devices. For example, N.O. relay input, the Alarm Polarity
should set to LOW in the ALARM SETUP menu. For N.C. relay input, the Alarm
Polarity should set to HIGH in the ALARM SETUP menu.
Connector pins 1-16 are for TTL/CMOS compatible alarm signals or for connect one side
of the contact type devices. Connector pins 20-21 are for input signal grounding or the
remaining side of the contact type devices.
The alarm hold input accept TTL/COMS alarm signal as well as contract device. The
connector pin 22 connected to Alarm Reset. The Alarm Reset signal return connects to
ground pin (pin 20-21).