LTS Security LTD3216C-PL, User Manual, Page: 29 / 353

The Grand Tour 19
No. Port Name Function
9 GND Ground.
3.2.6 1U
Figure 3-17
Table 3-14
No. Port Name Function
1 Ground terminal.
2
Alarm input port
1–16
Four groups of alarm input ports (Group 1: port 1 to port 4; Group
2: port 5 to port 8; Group 3: port 9 to port 12; Group 4: port 13 to
port 16). These ports receive the signal from the external alarm
source. There are two types: NO (Normally Open) and NC
(Normally Closed).
When your alarm input device is using external power, please
make sure the alarm input device and the DVR connect to the
same ground.
Alarm output port
1–3 (NO1–NO3;
C1–C3)

Three groups of alarm output ports. (Group 1: port
NO1–C1,Group 2:port NO2–C2,Group 3:port NO3–C3
）
).
These ports output alarm signal to the alarm device. Please
make sure power supply to the external alarm device.

NO
：
Normally open alarm output port.

C
：
Alarm output public end.
Ground.
3 Video input port Connects to analog camera to input video signal.
4 Audio input port
Receives audio signal output from the devices such as
microphone.
5 Audio output port Outputs audio signal to the devices such as the sound box.
6 HDMI port
High definition audio and video signal output port.
The port outputs the uncompressed high definition video and
multi-channel audio data to the connected display with HDMI
port.
7 USB port
Connects to the external devices such as keyboard, mouse, and
USB storage device.