Industrial Serial Fiber Server & TCP/IP Edge Node

Industrial Serial Fiber Server with RS232/485/422 to TCP/IP Purpose-built for large facility networks, encapsulating serial telemetry into IP packets for transmission up to 20km over single mode SC fiber, seamlessly bridging legacy field devices directly into modern optical switching infrastructure.

Part No. VT-FB810
sku : IoT-OF101
INSTANT QUOTE

Advanced Serial to Fiber Media Converter

Unlike simple physical-layer extenders, the VT-FB810 is an intelligent serial to fiber converter that actively translates serial telemetry to TCP/IP protocols before transmitting over optical fiber, enabling legacy RS232/485/422 devices to participate directly in IP network exchanges.

VT-FB810 TCP/IP serial to fiber media converter overview

Single-Mode Fiber & 3-in-1 Serial Interfaces

A single-mode SC optical interface reduces cabling costs. The versatile 3-in-1 serial port (DB9 for RS232, terminal blocks for RS485/422) gives you ultimate flexibility for a variety of field equipment.

Single-mode single-fiber SC interface
Three interface connections RS232 RS485 RS422

SCADA Networking & TCP/IP Edge Routing

Deploy in pairs for transparent 20km serial extension, or use a single unit to connect directly into a fiber switch. Operating as an advanced fiber to rs485 media converter, it allows host PCs or SCADA software to poll data via IP without needing extra serial cards.

Application scenarios for fiber to rs485 media converter networking
The difference between VT-FB810 TCP routing and standard media converters

Advanced Network Protocols & Auto-Recovery

Engineered for high reliability. Features an innovative disconnection detection mechanism that automatically re-establishes broken TCP links. Fully supports DHCP, DNS, and dynamic IP management.

Multiple functions TCP UDP DNS DHCP
Network disconnection detection mechanism Automatically re-establish connection
Support DHCP Support DNS

Adaptive Parameters & Plug-and-Play Pairs

When used in A/B pairs, the modules function as a transparent plug-and-play extension. The serial ports adapt to baud rates from 1200 to 115200 bps automatically.

Serial port parameter adaptive
No network parameters need to be configured in pair mode

Industrial Power & DIN-Rail Mount

Operates securely on a 9~24V DC wide voltage input via terminal block or standard DC plug. Designed for fast panel integration using standard 35mm DIN-rail clips.

Multiple Installations Wall mount and Rail mount

Click to purchase Rail mounting clips

Industrial Power Supply 9-24V

Hardware Details & Dimensions

Product physical show
Outline dimensions

Hardware Interface
Fiber InterfaceOptical SC pluggable interface
Serial PortRS232 (DB9) / RS485 / RS422 (Terminal)
Dimensions (L x W x H)9.4 cm × 6.5 cm × 2.5 cm
Optical Fiber Parameters
Fiber TypeSingle-mode Single-fiber, Bi-direction
VT-FB810-A WavelengthTX: 1310nm / RX: 1550nm
VT-FB810-B WavelengthTX: 1550nm / RX: 1310nm
Transmission Distance20 Km
Serial & Software Performance
Baud Rate1200 ~ 115200 bps
Network ProtocolsTCP, UDP, HTTP, ARP, ICMP, DHCP, DNS
Operating ModeTCP Server, TCP Client, UDP, Real Com Driver
Power & Environment
Input PowerDC 9V ~ 24V (357mA@9V)
Operating Temperature-40°C ~ +85°C
Humidity5 ~ 95% RH (relative humidity)
TCP/IP Encapsulation over Fiber
  • Unlike standard media converters that only alter physical signals, the VT-FB810 actively processes and converts serial data into TCP/IP packets before sending them over the optical network.
  • This enables direct connection of the module to an optical switch, allowing your host PC to acquire data directly through IP address or virtual serial ports without requiring an optical receiver at the host end.
Industrial Edge Reliability
  • Designed with inbuilt lightning and surge protection for RS485/422 terminals, it is very robust for outdoor and heavy industrial automation applications.
  • Incorporates intelligent disconnection detection algorithm that automatically re-establishes dropped TCP links to guarantee real-time data delivery.

Technical FAQ

What is the difference between the VT-FB810 and standard media converters like the VT-FB800?
Standard media converters (like VT-FB800) only perform physical signal conversion between Ethernet and fiber. The VT-FB810 is an actual Serial Device Server. It actively converts RS232/485 serial data into TCP/IP protocols before transmitting over fiber. This allows you to connect it directly to a fiber switch and poll data via an IP address without needing a receiver module at the host end.
Can I use two VT-FB810 units to simply extend a serial connection over fiber?
Yes. You can use them in A/B pairs to achieve up to a 20km RS485/RS232 extension. When used this way, they operate transparently. Please note that you MUST pair an A-end model (1310nm TX) with a B-end model (1550nm TX); identical models will not link.
Does it support Modbus RTU to TCP conversion?
Absolutely. Because it integrates full device server software, it supports directly converting Modbus TCP requests to Modbus RTU, making it perfect for upgrading legacy Modbus networks to modern optical IP infrastructure.

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