DVR systems DVRxx04HF-S Series - Manual (Page 59)

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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.
3.8.1.2 1.5U Series (Simple 1.5U)
The 1.5U series product interface is shown as in Figure 3-3.
Figure 3-3
You can refer to the following sheet and Figure 3-3 for alarm input and output information.
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 second line,
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.
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.
3.8.1.3 2U Series
The 2U series product interface is shown as in
Figure
3-4 .
Figure 3-4
You can refer to the following sheet and
AB cable
connection
AB cable
connection