24
etc. You need to use a 120Ohm resistance between A/B cable if there are too
many PTZ decoder.
e)
“
”
：
ground cable
；
You can refer to the following sheet and Figure 3-6 for alarm input and output
information.
Parameter
Grounding Alarm
Ground Ground
line
Alarm Input
1, 2,
…
,4
Relay Output
1,2,3,4: NO and C(Normally Open and Com)
5: NO,C and NC(Normally Open, Com, Normally Closed)
6: Ctrl 12V(This is used for reset the senor)
485 A
、
B
485 communication port. They are used to control devices
such as PTZ.
+12
（
C
）
This should input an external power input.
z
4-ch grounding alarm inputs. (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
If you need to reset the touched-off alarm remotely, you can use DVR to supply
controllable 12 V power to the alarm detector such as the smoke detector.
z
Use the same ground with that of DVR if you use external power to the alarm device.
Summary of Contents for Forensic
Page 1: ...1 Forensic DVR User s Manual ...
Page 9: ...9 ...
Page 39: ...39 Figure 4 14 Figure 4 15 Figure 4 16 ...
Page 43: ...43 Figure 4 20 Figure 4 21 Figure 4 22 ...
Page 53: ...53 Figure 4 43 ...
Page 78: ...78 Figure 5 42 ...
Page 83: ...83 Figure 6 11 ...
Page 108: ...108 Figure 7 44 Figure 7 45 Figure 7 46 ...
Page 122: ...122 Figure 8 5 Add device Add organization structure ...
Page 136: ...136 ...
