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Black Box MED102A fiber media converter with terminal block and SC port

Black Box Corporation

Black Box Corporation MED102A Async RS232/422/485 Media Converter Singlemode SC 8.95 Mile

SKU CH-BHN7-J7K8M MPN MED102A

Extends RS-232/422/485 signals up to 8.95 miles over singlemode fiber with -40 to 80 °C operating range

  • Device TypeTransceiver
  • Max Distance8.95 Mile
  • Power AdapterRail-mountable
  • Extends serial links up to 8.95 Mile over singlemode fibre
  • Operates reliably from -40 to +176° F (-40 to +80° C)
  • Supports RS-232, RS-422 and RS-485 on one unit
  • DIN rail power adapter simplifies cabinet installation
  • LED indicators show signal and power status at a glance

Industrial RS-232/422/485 fiber extender

The Black Box MED102A converts asynchronous serial signals to single-mode fiber with SC connectors for transmission up to 8.95 miles. It accepts RS-232, RS-422 or RS-485 inputs via terminal block and suits point-to-point or ring topologies. The rail-mountable power adapter fits DIN-rail enclosures common in industrial control cabinets. Extended temperature rating supports harsh environments.

Sustained operation across temperature extremes

The converter operates continuously from -40 to +176° F (-40 to +80° C) without active cooling. Data-derived or RTS-controlled transmit/receive switching on the RS-485 port maintains signal integrity over long cable runs. Indicator LEDs provide constant visual confirmation of power status and signal activity during extended deployments.

Replaces copper serial links limited by distance

This unit upgrades existing RS-232/422/485 wiring where electromagnetic interference or voltage potential differences corrupt data. It is not for multi-mode fiber networks, applications requiring managed switching features, or installations needing protocol conversion beyond the listed serial standards. Buyers needing Ethernet transport or redundant power inputs should consider other devices.

Highlights

  • Extends serial links up to 8.95 Mile over singlemode fibre
  • Operates reliably from -40 to +176° F (-40 to +80° C)
  • Supports RS-232, RS-422 and RS-485 on one unit
  • DIN rail power adapter simplifies cabinet installation
  • LED indicators show signal and power status at a glance

Specifications

BrandBlack Box
Device TypeTransceiver
Max Distance8.95 Mile
Power AdapterRail-mountable
Shipping weight0.27 kg
Package size114 × 114 × 81 mm

Questions about this item

How much power does the MED102A draw when running continuously on the rail-mountable adapter?

The unit is powered by the included rail-mountable adapter and operates across an extended ambient range of -40 to +176°F (-40 to +80°C) without active cooling.

Which serial interfaces must my existing equipment provide to connect to the terminal-block side?

The converter accepts RS-232, RS-422 or RS-485 signals on the terminal-block port and extends them over single-mode fiber.

Will the MED102A work alongside legacy RS-485 gear that uses RTS-controlled switching?

Yes, it supports data-derived or RTS transmit/receive switching for RS-485, so it integrates with older half-duplex equipment.

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