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 <> RS232 interface

  • Glass fiber interface RS232, model 81211

Transmit RS232 with handshake over long distances

The model 81211 Interface transmits serial RS232 data via multi-mode glass fibers over a distance of up to 3800 meters. In addition to both data signals two hardware handshake signals are also sent over the same fiber pair.

Properties

Interfaces:

  • 1 x RS232
    • 9-pin SUB-D connector with PC pin configuration
  • 1 x multi-mode fiber optic cable
    • ST connector

Management and connectivity:

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

Voltage 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

Data transmission over long distances and in extremely noisy environments make the use of fiber optics the logical choice as a physical transmission medium.

The use of plastic fiber optics allows easy-to-install connections over relative short distances of up to 100 meters. But for distances above this limit the use of glass fiber optic cable is unavoidable.

While distances of up to 4km are easily accomplished with multimode fiber optics, greater distances are the domain of singlemode fiber optics.

It used to be that routing and assembling glass fiber optics created significant problems for the users, but today - thanks to the wider use of glass fiber technology in networking - many companies are offering this work as a service.


Technical data

Connections and displays:

  • Serial port:
    • RS232 Interface
    • 9-pin SUB-D adapter
  • Glass fiber optics port:
    • ST plug adapter
  • Baud rate:
    • 0..115kbaud
  • Data format:
    • any format
  • Supported signals:
    • RxD, TxD, RTS, CTS
  • 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. 90mA @12V DC, 45mA @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 compact housing for top hat rail installation
    • 105 x 22 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)
  • Scope of delivery:
    • ST fiber-optic line <> RS232 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

    • PC/PC RS232 Cable, DB9F - DB9F, 2m
    • 11992
    • 9.00€
  • 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.