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Managed Fiber Optic Ethernet Switch w/Self-Healing Ring (6Tx + 2Fx)

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The TC3720 10/100M 6-Port Self-Healing Ring Ethernet Switch is a low cost solution for linking multiple RTUs & PLCs in industrial and SCADA fiber optic networks.

Intended for Self-Healing Ring topologies, the TC3720 Ethernet Fiber Optic Switch interconnects up to six 10/100M devices at each drop. Network settings can be set or changed via a Web-based configuration user interface.

  • Ring Self-Heals within 250ms
  • Web-Based/Serial Configuration
  • IEEE 802.3, 802.3u, 802.3x Compliant
  • 6 Ethernet 10/100-Base Auto-Sensing UTP Ports
  • 2 Fiber Optic 100Base-FX Ports
  • Standard Single Mode Distance of 50km (optional 100km)
  • Multimode or Single Mode (1300/1550nm)
  • Industrial Hardened (optional)
  • 12VDC, Optional 24VDC, -48VDC, 125VDC or 115/230VAC


The TC3720 is frequently used to interconnect Remote Terminal Units (RTUs) or Programmable Logic Controllers (PLCs) in Utility substation SCADA Networks that require multiple channels and the reliability of a Self-healing Ring Topology. It is also used for similar connectivity applications in Traffic Control, Industrial Process Control and Security System Networks.
TC3720 - Self-Healing Multi-Drop Ethernet to Fiber Optic Switch
Click to enlarge


Data Rates
  1. Rates10/100 Mbps (auto-sensing)
  1. TransmitterELED/LASER*
  2. ReceiverPIN Diode
  3. Wavelength1300nm Multimode, 1300/1550nm Single Mode
  4. Fiber Optic ConnectorsST, Optional FC, SC
  5. Loss Budget* - 1300/1550nm
  6. LED/ELED15dB MM @62.5/125µm
  7. LASER20dB SM @9/125µm
  8. Interface2 Ethernet 100Base-Fx
Visual Indicators
  1. System LEDsPWR A, PWR B, Vcc
  2. Port Status (each port)100M, FULL/COL, LINK/ACT
  1. Switch Ports6
  2. ConnectorRJ-45 Female
  3. InterfaceEthernet 10/100Base-T
  4. StandardIEEE 802.3/3u/3x
  1. Standard12VDC @ 500mA
  2. Optional24VDC, -48VDC, 125VDC, 115/230VAC
  1. Operating-10°C to 50°C
  2. Hi-Temp (optional)-20°C to 70°C
  3. Extreme Temp (option)-40°C to 80°C
  4. Storage-40°C to 90°C
  5. Humidity95% non-condensing
Physical (Rackmount Unit)
  1. Height(3.53 cm) 1.39"
  2. Width(48.26 cm) 19.0"
  3. Depth(24.80 cm) 9.80"
  4. Weight(544 gm) 1.2 lbs
* Contact factory for higher requirements


For more information

Product version may differ from current manual. For assistance or proper manual version please contact Technical Support.