Description
ComNet FVT110M
Technical Specifications:
- Fiber Type: Multimode optical fiber
- Video Input: 1 V peak-to-peak composite video, 75 ohm BNC input
- Video Encoding: 10-bit digital EIA RS-250C encoding
- Video Bandwidth: 5 Hz to 10 MHz
- Differential Gain: Less than 2%
- Differential Phase: Less than 0.7 degree
- Data Interfaces: RS232, RS422, 2/4-wire RS485, UTC up-the-coax
- Data Rate: DC to 250 kbps NRZ
- Contact Input: Dry contact closure input
- Optical Transmitter: Laser diode, 1310 nm wavelength
- Power Supply: 12 to 24 VDC
- Operating Temperature: -40 °C to +74 °C
- Storage Temperature: -40 °C to +85 °C
- Optical Connector: ST port
Function Features:
- Digitally encode analog composite video for transmission over multimode fiber
- Transparent bi-directional serial data channel for PTZ camera control
- Accept dry contact closure input and transmit status over fiber to receiver
- Front panel LED indicators for power, video, data and contact input status
- DIP switch selectable for different serial data formats and protocols
- Electrical galvanic isolation between camera side and remote control room
- Compatible with most major analog CCTV cameras and PTZ controllers
- Compact housing supports multiple mounting options
Application Scenarios:
- Remote industrial camera video signal transmission
- Petrochemical plant CCTV surveillance fiber links
- Power substation camera and PTZ control extension
- Highway and tunnel security video transmission
- Large campus and building security fiber surveillance systems
Material Composition:
- Housing: Aluminum alloy metal enclosure
- Main PCB: FR4 fiberglass printed circuit board
- Core Components: Laser optical transmitter, video encoder chip, serial transceiver
- Terminals: Screw copper terminal blocks for power, data and contact input
- BNC Connector: 75 ohm coaxial connector for video input
- Passive Components: Precision resistors, capacitors and surge suppression components
Structural Features:
- ComFit compact aluminum housing, compatible with wall, rack or DIN rail mount with adapter
- Front panel with LED indicators, DIP switches and ST fiber port
- BNC video input port on front panel
- Side terminal blocks for power, serial data and dry contact input wiring
- Internal metal shielding reduces external electromagnetic interference
Working Principle: Analog composite video signal enters via BNC port and converts into 10-bit digital data by video encoder. Serial PTZ control data and dry contact status are multiplexed together with video data stream. The combined digital signal modulates laser diode and transmits as light signal through multimode fiber. The module continuously monitors input signal status and displays operating state via front panel LEDs. All signals travel through fiber without electrical conductive path between transmitter and receiver sides.
Installation Requirements:
- Install unit near analog CCTV camera inside protected enclosure
- Connect camera video output to BNC input using 75 ohm coaxial cable
- Use ST multimode fiber patch cord to connect to FVR110M receiver
- Wire dry contact input and serial data to screw terminal blocks
- Supply 12–24 VDC power and connect protective earth
- Adjust DIP switches to match serial communication protocol
- Maintain fiber bending radius above minimum requirement
Usage Notes:
- Pair FVT110M only with matching FVR110M receiver
- Keep fiber connector end face clean and free of scratches
- Do not bend optical fiber below minimum bending radius
- Disconnect power before modifying DIP switch settings
- Prevent overvoltage surge on video and data input terminals
- Check LED status to diagnose fiber link and signal faults during commissioning
