DVR systems DVRxx04HF-S Series - Manual (Page 61)

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In the first line, from
the left to the right,:
1，2，3，4,, 5, 6, 7,
8, 9, 10, 11, 12, 13,
14, 15, 16 ALARM 1 to ALARM 16. The alarm becomes active in low voltage.
In the first line after
the number 1-4,
from the left to the
right:
NO1 C1，
NO2 C2，
NO3 C3，
NO4 C4,
NO5 C5 NC5
The first four are four groups of normal open activation output
(on/off button)
NO5 C5 NC5 is a group of NO/NC activation output (on/off button)
CTRL 12V Control power output. You need to close the device power to cancel
the alarm.
+12V It is external power input. Need the peripheral equipment to provide
+12V power (below 1A).
Earth cable.
T+, T-, R+, R- RS485 port
485 A/B 485 communication port. They are used to control devices such as
PTZ. Please parallel connect 120TΩ between A/B cables if there are
too many PTZ decoders.
3.8.2 Alarm Input Port
Please refer to the following sheet for more information.
z
Normal open or Normal close type.
z Please parallel connect COM end and GND end of the alarm detector (Provide external
power to the alarm detector).
z Please parallel connect the Ground of the DVR and the ground of the alarm detector.
z Please connect the NC port of the alarm sensor to the DVR alarm input(ALARM)
z Use the same ground with that of DVR if you use external power to the alarm device.
Figure 3-5