Black Box ME800A-R4 Async RS232 Extender over CATx, DB9 Female to Terminal Block

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Black Box ME800A-R4 Async RS232 Extender over CATx, DB9 Female to Terminal Block
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Only 75 left in stock - order soon! Inventory as of date 07/16/2026.
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Overview


Features:

  • At a maximum speed of 115.2-kbps, you can go up to 4000 feet.
  • It must be used in pairs.

RS-232 is the most common serial interface in use today. This means you can use your SHM-C in RS-232 installations - industrial applications; security systems; UNIX®, DEC2, and HP® workstation connectivity; and more.

Choose 4-Wire SHM-C Async to transmit data up to 4 miles (6.4 km). Run loopback tests simply by pressing a front-panel button. Open the flip-top lid for quick DTE/DCE selection.

Transformer and optical isolation protect your data from electrical interference.

  • Full duplex operation over 4-wire CATx
  • Data rate up to 115.2 kbps
  • Range of up to 6.4 km (4 miles) at 9.6 kbps over 24 AWG lines
  • Ideal for point-of-sale applications.
  • The ME800A-R4 is backwards compatible with the ME800A-R3.

NOTE(s):

SHM-C Async Modems must be used in pairs. This model is also backwards compatible with the ME800A-R3

Product works with:

  • CAT5 Unshielded 100-MHz Solid Bulk Cable (EYN717A-1000)
  • DB9 Serial Extension Cable, M/F (BC00200)
  • DB9 Serial Extension Cable, M/M (BC00240-0006)
  • Serial AT Adapter, DB9 M to DB25 F (FA521A-R3)
  • Serial AT Adapter, DB9 F to DB25 M (FA520A-R5)
  • Short-Haul Modem-B (ME800A-R3, etc.)
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