Sigrand Distributed Surveillance System

    In this review I want to talk about the equipment of our company for the construction of video surveillance systems. There are many IP cameras, switches, thermal housings and other equipment with very similar characteristics on the market, so I will try to focus on the distinctive features. Under the cut, you can learn about how you can connect video cameras with a chain to one switch port, about smart thermal housings and about multi-kilometer PoE extenders.

    Let's start with camcorders. The range is still limited to the Sigrand SG-1C-xxx line in a standard case without an integrated lens.

    The cameras have a modular design, which makes it possible to produce modifications in the same housing with different sensors, processors and network interfaces.
    The Texas Instruments DM368 processor and two types of sensors with support for a wide dynamic range (WDR or HDR) are now used. All the standard attributes of modern cameras are also present: mechanical IR filter, h.264 encoder 1920x1080 30 frames per second, ONVIF support.

    SG-1C-111SG-1C-121SG-1C-112SG-1C-122
    Sensor1/3 ”CMOS Aptina MT9M034 1.2 Mipx1/3 ”CMOS Aptina AR0331 3.1Mpix1/3 ”CMOS Aptina MT9M034 1.2 Mpix1/3 ”CMOS Aptina AR0331 3.1Mpix
    Maximum resolution1280x960 30 fps1280x720 30 fps2048x1536 20 fps1920x1080 30 fps1280x960 30 fps1280x720 30 fps2048x1536 20 fps1920x1080 30 fps
    Dynamic range120 db100 db120 db100 db
    Minimum Illumination0.03 lux F 1.2 (b / w mode)0.1 lux F 1.2 (b / w mode)0.03 lux F 1.2 (b / w mode)0.1 lux F 1.2 (b / w mode)
    Network interfaceTwo Ethernet ports with PoE-through supportTwo Ethernet ports with PoE-through supportSHDSL Port with PoDSL SupportSHDSL Port with PoDSL Support
    Retail price$ 339$ 399$ 709$ 769


    Now about the features. As you can see in the picture, the SG-1C-111 and SG-1C-121 cameras have two ethernet ports. Inside there is a three port switch that allows you to connect up to three devices to the network. The MII camera interface is connected to one port and the two remaining are brought out. If you connect a switch to one of the external ports, and one more camera to the second, we get the possibility of serial connection. That is, a chain of cameras can be “hung” on one port of the switch. Passive PoE technology is used to power the camera chain. Power is supplied through two free pairs and passes through two external ports of the camera.

    The maximum possible number of cameras in the chain depends on three parameters: the power of the PoE injector, the power consumption of the cameras and the distance between them in the chain. If you use the MS-17E8PP module with a power of 60W per channel as a PoE injector, you can connect up to 12 cameras, with a small distance between them. If the distance between the cameras is the maximum possible for Ethernet 100 meters, then the number of cameras in the chain is limited to 5 pieces. The chain length, from the switch to the last camera, will be 500 meters. This becomes possible due to the operation of the cameras at a PoE voltage reduced to 30 V. We call this connection “through” PoE or PoE-through.

    Sigrand SG-1C-112 and SG-1C-122 cameras have a built-in SHDSL modem, which

    allows you to transmit a 2 Mbit video stream at a distance of up to 8 kilometers via a standard cable with a cross section of 0.5 mm. To power the camera at this distance, a constant voltage of 240V is used along the signal line. This is a fairly common PoDSL (Power over DSL) technology. To connect cameras using this technology, the MS-17H4P2 module is used.

    You can watch the online broadcast of our cameras and not only ours here.

    Sigrand Thermocases SG-1H-W1 and SG-1H-I1 are the first smart PoE thermocouples with a searchlight.

    SG-1H-W1SG-1H-I1
    Backlight typeWhite 4000KInfrared 850 nm
    Number of diodes, maximum power10 * 1 W = 10 W10 * 1.5 W = 15 W
    Light flow1570 Lm
    Radiation pattern45 degrees45 degrees
    Energy consumption15.4 W (PoE class 3)15.4 W (PoE class 3)
    Retail price$ 209$ 209

    The thermal casing is controlled by the integrated microcontroller and configured via the RS-232 port. There are three temperature sensors: diodes, inside and outside the casing. A powerful radiator and two fans are used to cool the diode array. The casing has two operating modes - stand-alone and controlled via the RS-232 port. In offline mode, you can use cameras of any manufacturer with PoE support. The thresholds for turning the projector on and off, power distribution between the camera and the projector, turning fans on and off, etc. are set.
    If thermocases are used together with Sigrand cameras, then all processes can be controlled via the web interface, as well as several thermocases can be sequentially connected to one switch port using PoE-through technology.

    The basis of the system for building a distributed video surveillance system with remote power is the Sigrand SG-17S switch - the only device on the market with the ability to install different interface modules - SHDSL or Ethernet.

    As standard, it comes with a 240-watt power supply and two 10/100 / 1000BASE-T / SFP ports. Allows you to connect: up to 32 cameras with Ethernet interfaces (PoE class2 - 7.5 W), up to 16 backlit thermal housings (PoE - 15.4 W) and up to 16 PoDSL cameras. The price is $ 699.

    Now there is not much about the modules for the SG-17S platform: the maximum number is up to 4 pieces, support for PoE and PoDSL interfaces.

    MS-17E8PP (8 x 10/100 Ethernet PoE +)

    8-port PoE module. Supports power technology for remote devices in free pairs (in Passive PoE mode). Maximum power up to 60 watts per channel. Price $ 239.

    MS-17H4 (SHDSL 4 x 15.2 Mb / s)

    4-port SHDSL module. The maximum speed for each interface is up to 15296 kbit / s for one pair. Price $ 379.

    MS-17H4P2 (SHDSL 4 x 15.2 Mbps / PoDSL)

    4-port PoDSL module. The maximum speed for each interface is up to 15296 kbit / s for one pair. Provides remote 240VDC power to each interface. The maximum power of connected devices is up to 17 watts. Price $ 559.

    By combining different modules, you can connect multiple cameras and thermocouples to one Sigrand SG-17S device, covering almost all distance ranges.


    If you need to connect and power one PoE camera over a long distance, you can use our new SHDSL modems Sigrand SG-17B-261 and SG-17B-351.
    The SG-17B-351 ($ 409) receives PoE power and injects into the PoDSL line,

    while the SG-17B-261 ($ 359) receives 240V power from the SHDSL line and injects PoE.

    It turns out a multi-kilometer extension cable PoE.


    All software on which our equipment runs is completely free and can be downloaded in source. Detailed information about our equipment can be found on the website www.sigrand.com

    Promising, in our opinion, developments we are currently working on:
    1. Single-channel Passive PoE injector 15 - 60 W (from $ 10 to $ 20)
    2. Switch 2 ports 10/100 / 1000BASE-T / SFP + 4 PoE ports 60 W, desktop or outdoor (from $ 200 to $ 300)
    3. Sigrand SG-2C-xxx cameras in the street, with various sensors and network interfaces, motorized zoom lens and auto focus. (from $ 400)
    4. Sigrand SG-3C-xxx cameras in the street, the cheapest line of cameras, a competitor to Ubiquiti Air, only with a varifocal lens and a 2 megapixel sensor. ($ 150)
    5. Modular router + switch + NVR + Sigarnd SG-18S repeater, on a powerful freescale P10xx / P20xx network processor, 3 10/100 / 1000BASE-T / SFP ports, 3 expansion modules, HDD rack, power supply up to 1000 watts. It is theoretically possible to connect to the device and power up to 200 cameras. An updated version of momentvideo.org
    6 will be used as software . VDSL2 modems and modules for cameras and a switch.
    6. Floodlight white or infrared with adjustable power up to 15 W, powered by PoE and the ability to connect in a chain.

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