SRS2F Series

Stand-alone RS232 Remotely Managed Media Converter
RS232 Copper to Fiber


The SRS2F Series stand-alone serial RS232 to fiber converters allow you to extend the distance between serial connections with the use of fiber optic cable. These full-featured stand-alone converters transmit the full complement of RS232 flow control/handshaking signals optically and supports full or half-duplex asynchronous data transmission at speeds up to 115 Kbps. Link a remote terminal to a host computer: Connect multiple devices, such as security scanners, POS devices, remote terminals and building access/alarming systems to a host computer. Ideal for campus or business environments where remote devices can be networked in a point-to-point configuration where distances are greater than the 15 meter limitation of conventional copper serial cables.

In addition, these stand-alone media converters can also be managed from remote locations, in-band, over the fiber, when linked to a CRS2F Series installed in a managed Point System™ chassis.

Please note: this product is soon to be retired and replaced by the ION Platform. Limited quantities may still be available, Contact our sales team to find out more. For more information, view the Point System vs ION product comparison and cross reference guide.

SRS2F Series

Related Products

SRS2F Series Overview


  • Remote Management
  • Local or Remote Loopback on copper and fiber
  • DTE/DCE switch for easy installation with straight-through cabling
  • Full/Half-duplex asynchronous transmission at speeds up to 115 Kbps
  • Supports the following flow control signaling:
  1. DCD – Data Carrier Detect
  2. RXD – Receive Data
  3. TXD – Transmit Data
  4. DTR – Data Terminal Ready
  5. SG – Signal Ground
  6. DSR – Data Set Ready
  7. RTS – Request To Send
  8. CTS – Clear To Send

    SRS2F Series Tech Specs


      • EIA/TIA-574
      • EIA/TIA RS-232E

      Data Rate

      • 115 Kbps


      • DTE/DCE: Select appropriate position
      • Loopback: Norm = normal operation;
      • Loop = Fiber and copper loopback

      Status LEDs

      • P: (Power): Lit for normal operation
      • RX: Steady = Copper Link;
      • Flashing = Rx Data
      • FL: Steady = Fiber Link;
      • Flashing = Loopback mode


      • Width: 3.3” [84 mm
      • Depth: 4.8” [122 mm]
      • Height: 1.2” [30 mm]

      Power Consumption

      • 5 Watts

      Power Supply

      • External AC/DC; 12 VDC, 0.5A min output; 120-240VAC input


      • Operating: 0°C to 50°C
      • Humidity: 5% to 95% (non-condensing)
      • Altitude: 0 – 10,000 ft.


      • 2 lbs. [0.90 kg]


      • Safety: Wall Mount Power Supply: UL Listed and CSA certified
      • Emissions: CISPR22/EN55022 Class A + EN55024, EN60950 Class A, FCC Class A, CE Mark


      • Lifetime

    SRS2F Series Resources

    Application Spotlights
    Press Releases
    Case Studies

    SRS2F Series Downloads

    Note: Some Documentation may have Transition Networks named or pictured. Transition Networks was acquired by Lantronix in August 2021. Learn more about the acquisition here.

    SRS2F Series Part Numbers

    SRS2F3111-100 SRS2F Series

    DB-9 [15 m/49 ft.] to 1300nm multimode (ST) [2 km/1.2 mi.] Link Budget: 11.0 dB

    SRS2F3113-100 SRS2F Series

    DB-9 [15 m/49 ft.] to 1300nm multimode (SC) [2 km/1.2 mi.] Link Budget: 11.0 dB

    SRS2F3114-100 SRS2F Series

    DB-9 [15 m/49 ft.] to 1310nm single mode (SC) [20 km/12.4 mi.] Link Budget: 16.0 dB

    Lantronix Part # Name Description Order Now

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