Dahua nvr4208-8p User Manual

127
canceled. Current is 500mA.
＋12V
Rated current output. Current is 500mA.
GND
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.
Note
 Different models support different alarm input ports. Please refer to the specifications sheet for
detailed information.
 Slight difference may be found on the alarm port layout.
2.3.2 Alarm input port
Connect the positive end (+) of the alarm input device to the alarm input port (ALARM IN 1～16) of the
NVR. Connect the negative end (-) of the alarm input device to the ground end ( ) of the NVR.
Figure 2-81
Note
 There are two alarm input types: NO/NC.
 When connect the ground port of the alarm device to the NVR, you can use any of the GND ports
( ).
 Connect the NC port of the alarm device to the alarm input port (ALARM) of the NVR.
 When there is peripheral power supplying for the alarm device, please make sure it is earthed with
the NVR.
2.3.3 Alarm input and output port
 There is peripheral power supplying for the external alarm device.

Dahua nvr4208-8p Specifications

General

Operating System	Embedded LINUX
IP Camera Input	8 channel
Two-way Talk	1 channel Input, 1 channel Output, RCA
Interface	1 HDMI, 1 VGA
OSD	Camera title, Time, Video loss, Camera lock, Motion detection, Recording
Record Interval	1 ~ 120 min (default: 60 min), Pre-record: 1 ~ 30 sec, Post-record: 10 ~ 300 sec
Ethernet	1 RJ-45 Port (10/100/1000Mbps)
Max. User Access	128 users
Smart Phone	iPhone, iPad, Android
HDD Bays	1
Operating Temperature	-10°C ~ +55°C (+14°F ~ +131°F)
Main Processor	Dual-core embedded processor
Multi-screen Display	1/4/9
Video Detection and Alarm	Motion Detection, MD Zones: 396 (22 x 18), Video Loss, Camera Blank
Alarm input	4
Relay Output	2
Compression	H.265, H.264
Recording Resolution	Up to 8MP
Record Mode	Manual, Schedule (Regular, Continuous), MD (Video detection: Motion Detection, Camera Blank, Video Loss)
PoE	8 ports (IEEE802.3af/at)
Protocols	HTTP, TCP/IP, IPv4/IPv6, UPnP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter, PPPoE, DDNS, FTP, Alarm Server, IP Search (Support Dahua IP camera, DVR, NVS, etc.)
USB Interface	2 USB2.0
Power Supply	AC 100~240V, 50/60 Hz
Power Consumption	NVR: <10W (without HDD), PoE: Max 25.5W for single port, 130W total
Operating Humidity	10%~90% RH