Network Video Recorder
User Manual
Network Video Recorder
11
PTZ decoder connections
A. The grounding of the PTZ decoder and NVR must be shared otherwise the common-mode voltage will
lead to the PTZ control failure. The shielded twisted pair
is recommended.
B. Avoid the entrance of high voltage. Make the layout reasonably. Take precaution from the thunder.
C. In the outlying end connect 120
Ω resistance paralleled to reduce the inflection and insure the signal qual-
ity.
D. The 485 AB lines of NVR can not connected with other 485 output equipments paralleled.
E. The voltage between the AB lines of the decoder must be less than 5V
Front equipment grounding note
Bad grounding can lead to the burnout of the chip.
Alarm input type unlimited
The NVR alarm output port is constant opening type
4-CH Alarm Terminal
Note
: Alarm input, the need to ground phase, (NO) is opening type.
8-CH and 16-CH Alarm Terminal
Note
: Alarm input, the need to ground phase, (NO)is opening type, (NC)is closing type ,(NO)is the common
