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Black Box MED102A industrial DIN rail serial fiber converter, compact metal enclosure

Black Box Corporation

Black Box MED102A Industrial DIN Rail RS-232/422/485 Serial Fiber Converter

SKU CH-SJ54-6VZRV

Industrial DIN-rail converter links RS-232, RS-422 and RS-485 serial devices over single-mode fiber for EMI-free multi-drop networks

  • Premium serial-to-fiber conversion for industrial networks
  • RS-232/422/485 multi-standard support simplifies integration
  • Duplex single-mode fiber extends links beyond copper limits
  • EMI/RFI immunity protects data in noisy environments
  • Multi-drop fiber ring topology enables one-to-many serial connectivity

Industrial serial-to-fiber converter

The MED102A converts asynchronous serial signals to duplex single-mode fiber for industrial environments. It mounts on DIN rail and handles RS-232, RS-422 and RS-485 equipment in full- or half-duplex modes. The unit supports multi-drop fiber-ring layouts so one serial device can reach multiple remote nodes.

DIN rail mounting and mixed-standard wiring

Snap the converter onto standard DIN rail and terminate the serial side with screw terminals matching your device pinout. The fiber side uses duplex single-mode connectors; verify transmit and receive fibers are not crossed, which is the most common cause of link failure. Mixed-standard support lets the unit replace older converters without re-cabling the serial bus.

Duplex single-mode fiber interface

The converter requires duplex single-mode fiber cable and matching connectors to operate. If your installation uses multimode fiber or a different connector type, this unit will not link. Buyers who need multimode support or a different wavelength should select another model.

Highlights

  • Premium serial-to-fiber conversion for industrial networks
  • RS-232/422/485 multi-standard support simplifies integration
  • Duplex single-mode fiber extends links beyond copper limits
  • EMI/RFI immunity protects data in noisy environments
  • Multi-drop fiber ring topology enables one-to-many serial connectivity

Specifications

BrandBLACK BOX

Questions about this item

How do I confirm the MED102A is converting data correctly after installation?

Check the link LED for a steady light on the fiber port, then send test data from the serial device and verify the remote end receives it without errors.

What does the MED102A package include and what must I source separately?

The converter ships with DIN-rail mounting hardware and a terminal block for the serial side; you must supply duplex single-mode fiber cable and a suitable DC power source.

Which serial standard should I select on the MED102A for my application?

Use the DIP switches to choose RS-232 for simple point-to-point links, RS-422 for balanced differential signalling over longer fibre runs, or RS-485 when multiple devices share the same fibre ring in multi-drop mode.

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