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Black Box ME890A-R2 DB9 line driver pair with CATx RJ-45 links

Black Box Corporation

Black Box Corporation ME890A-R2 CATx DB9 Line Driver 4000 ft

SKU CH-93C0-XN0YE MPN ME890A-R2

Extends RS-232 serial links up to 4000 ft over CATx cabling with full-duplex hardware handshake and no configuration required

  • Extends serial links to 4000 ft over CATx
  • Full-duplex RS-232 with RTS/CTS hardware handshake
  • Zero-configuration plug-and-play installation
  • Local DCE DB9 female and remote DTE DB9 male pair
  • Transparent TXD/RXD signal pass-through for legacy equipment

CATx DB9 Line Driver 4000 ft

The Black Box ME890A-R2 extends RS-232 connections over standard CATx cabling up to 4000 feet. A local unit with a DB9 female connector configured as DCE pairs with a remote unit featuring a DB9 male connector configured as DTE. The system requires no setup or configuration and suits remote device control or data transfer between computers.

4000-foot range with hardware handshake

The driver passes TXD, RXD, RTS and CTS signals to support full-duplex transmission with hardware handshake. It comfortably handles serial links across large facilities where standard cables fall short. The fixed 4000-foot limit defines the maximum separation; longer runs exceed the specified range and are not supported.

Plug-and-play serial extension

Each end connects directly to a DB9 port without software drivers or dip switches. The local DCE and remote DTE pin-outs let the pair function as a transparent extension cable between two RS-232 devices. CATx infrastructure carries the link, freeing the build from bulky serial cabling while preserving hardware flow control.

Highlights

  • Extends serial links to 4000 ft over CATx
  • Full-duplex RS-232 with RTS/CTS hardware handshake
  • Zero-configuration plug-and-play installation
  • Local DCE DB9 female and remote DTE DB9 male pair
  • Transparent TXD/RXD signal pass-through for legacy equipment

Specifications

BrandBlack Box
Shipping weight0.39 kg
Package size375 × 375 × 375 mm

Questions about this item

Will the ME890A-R2 work with my existing RS-232 equipment that uses standard DB9 cables?

Yes, the local unit has a DB9 female connector configured as DCE and the remote unit has a DB9 male connector configured as DTE, so they connect directly to standard RS-232 ports without gender changers.

How can I verify the line driver is passing data correctly after I install it?

The units pass TXD, RXD, RTS and CTS signals with full-duplex transmission and hardware handshake; a successful loopback test or normal application communication confirms operation.

Does the package include the CATx cable needed to span the 4000 ft distance, or must I supply it?

The CATx cable is not included; you must provide your own Category-rated cable with RJ-45 connectors to link the local and remote units.

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