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4-Port Redundant Ring Gigabit Ethernet Switch

Supplier: Optical Systems Design

The OSD2251 is a 4-port industrial Ethernet switch with redundant ring operation providing reliability and simple network management providing real-time monitoring. It has two 10/100/1000Base-T RJ45 copper ports and two SFP ports for the ring.

Price Guide: POA


  • Any network utilising a mix of copper and fiber
  • Industrial IP communications
  • Self-healing Gigabit Ethernet backbone networks

Features and Benefits of the OSD2251 Ethernet Media Converter:

  • Complies with IEEE802.3i/802.3u/802.3ab
  • 10/100/1000Base-T, IEEE802.3z 1000Base-Lx/Sx standards
  • Has a total of four ports: two fixed copper ports for 10/100/1000Base-T and two SFP ports for the fibre ring
  • A network diameter of hundreds of kilometers is practical
  • Ring reconfiguration in the case of cable or switch failures takes less than two milliseconds per hop
  • MDI/MDIX Crossover: no need for crossover cables
  • Can be used with either singlemode or multimode fiber over a variety of link budgets
  • Available for operation over 1 or 2 fibers
  • Auto-Negotiation for half or full duplex operation
  • Powered by non-critical 10 to 36VDC or 24VAC supplies
  • Dual power supply inputs
  • Operates over the temperature range of -20 to +75ºC
  • OSDview Lite Network Management System
  • Interoperates with the OSD2244 Gigabit Ethernet switch through which the OSDview Lite NMS operates
  • SFP modules sold separately
  • DIN rail mounting


OSD2251 Ethernet Media Converter Data Sheet