W&T connects
Interfaces for TCP/IP, Ethernet, RS-232, RS-485, USB, 20mA, glass and plastic fiber optic cable, http, SNMP, OPC, Modbus TCP, I/O digital, I/O analog, ISA, PCI
Data sheet:

ST fiber-optic line bus <> RS485 interface

  • ST fiber-optic line bus interface

Network bus systems over glass fiber optics

Using multiple glass fiber optic adapters model 65210 a copper-based RS485 master-slave bus can be converted into an optical bus without additional protocols. Transmission is at a rate of up to 1.5 Mbaud and in any data format.

Properties

Interfaces:

  • 1 x RS485
    • 9-pin Sub-D plug
    • 2- and 4-wire operation
  • 2 x Multi-mode glass fiber optics
    • ST connector

Management and connectivity:

  • No re-configuration of transmission parameters required
  • Transmission of two data channels
  • Noise-immune transmission over a distance of up to 3800 meters per segment
  • Galvanic isolation up to nearly any value between the connected devices

Power supply:

  • External
    • 12V-24V AC/DC via plug-in screw terminal
    • Galvanically isolated power connection

Standards & more

  • Conforms to standards both in office and industrial environments:
    • High noise resistance for industrial environments
    • Low noise emission for residential and business areas
  • 5 year guarantee

Worth knowing

Schematic diagram of an optical bus system for RS485 devices:

Bus system diagram


Technical data

Connections and displays:

  • Serial port:
    • RS485 interface
    • 9-pin SUB-D adapter
  • Glass fiber optics port:
    • ST plug adapter
    • SMA plug adapter on request
  • Operating modes:
    • 4-wire with automatic control
    • 2-wire with automatic control
  • Switching time:
    • approx. 10µs for changing from data sending to receiving for RS485 automatic control (can be modified on request)
  • Baud rate:
    • 0..1.5Mbaud
  • Data format:
    • any format
  • Supported topologies:
    • Bus and star, but no ring structures
  • Supported signals:
    • RxD, TxD
  • Cascadability:
    • 5 adapters @115Kbaud, 32 adapters @19.2Kbaud
  • Fiber-optic medium:
    • Multi-mode fiber 50/125μm, 62.5/125μm
  • Wavelength:
    • 820nm
  • Optical budget:
    • 50/125µm: typically 9.6dB, min. 4.2dB
    • 62.5/125µm: typically 13.4dB, min. 8.0dB
  • Maximum distance:
    • 50/125µm: typically 3200m, min. 1400m @3dB/km
    • 62.5/125µm: typically 3800m, min. 2200m @3.5dB/km
  • Galvanic isolation:
    • Isolation voltage min. 1 KV DC between power and the serial port
  • Supply voltage:
    • 12..24V AC/DC
  • Current consumption:
    • typ. 80mA @12V DC, 40mA @24V DC
  • Supply connection:
    • Plug-in screw terminal, 5.08mm spacing
    • Labeled "L+" and "M"
  • Displays:
    • 1x LED Data
    • 1x LED Power

Housing and other data:

  • Housing:
    • Plastic housing for top hat rail installation
    • 105 x 45 x 75mm (L x W x H)
  • Enclosure rating:
    • IP20
  • Weight:
    • approx. 100g
  • Ambient temperature:
    • Storage: -40..+70°C
    • Operating in non-rowed installation: 0..+60°C
    • Operating in rowed installation 0..+50°C
  • Permissible relative humidity:
    • 5..95% RH (non-condensing)
  • Life expectancy:
    • > 25 years at 25°C ambient temperature
  • Scope of delivery:
    • ST fiber-optic line bus <> RS485 interface
    • Please order power supplies separately as accessories

Accessories

  • Power supplies

    • Plug-in power supply, 24V / 500mA DC with Euro plug
    • 11021
    • 19.00€
    • Plug-in Power Supply, 24V / 750mA DC with Euro, US and UK plug
    • 11026
    • 34.00€
    • Power Supply for DIN rail mount, 24V / 1A DC
      (merchandise, 2-year manufacturer’s guarantee)
    • 11084
    • 49.00€
  • Cable and Connector Accessories

    • DB9F connection cable with open cable ends, right angled, 1.5m
    • 11903
    • 16.00€
    • 9-pol. SUB D socket with soldering terminals and shielded housing
    • 11904
    • 9.00€
    • 9-pol. SUB D socket with screwing terminal and shielded housing
    • 11905
    • 19.00€
  • FO-Accessories

    • Patch cable ST/ST, 1 meter, 50/125um
    • 81901
    • 14.00€
    • Patch cable ST/ST, 2 meters, 50/125um
    • 81902
    • 19.00€
    • Patch cable ST/ST, 5 meters, 50/125um
    • 81905
    • 24.00€
    • Patch cable ST/ST, 10 meters, 50/125um
    • 81910
    • 34.00€
    • Patch cable ST/ST, 15 meters, 50/125um
    • 81915
    • 39.00€
  • Mechanical Accessories

    • Mounting bracket for wall mounting
    • 58812
    • 9.98€
    • 19" DIN rail
    • 58813
    • 19.00€

* Our offering is intended only for commercial users. We will be happy to refer private end customers to trading partners through whom our products can be purchased.