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Sync RS232/RS-485 Extender over CATx - Multipoint, DB25 Female to Terminal Block

Extend sync RS-232/485 data beyond the 50 ft limitation over CATx at data rates up to 128 kbps and reach distances up to 4 miles in point to point or multipoint environments.

Item #:  Sync RS232/RS-485 Extender over CATx - Multipoint, DB25 Female to Terminal Block


Call 1300 734 455 for pricing and to place order.
Please Note: Once ordered, this product cannot be cancelled or returned for credit.
Call for Pricing
*Price excludes GST

Product Features

  • Synchronous data operation
  • Switch-selectable speeds range from 1200 bps to 128 kbps.
  • Two-wire/half duplex or four-wire/full or half duplex
  • Offer a range of transmit-clock select options and delayed RTS/CTS settings.
  • Supports terminal block connections.
  • LEDs indicate flow-control status.
  • Deliver reliable communications in industrial environments.


With selectable speeds up to 128 kbps, this line driver provides synchronous data communications over 2- or 4-wire lines and, as part of a multidrop network, can support up to 64 devices.

Your data travels at up to 128 kbps with the BLACK BOX® RS-232/RS-485 Multipoint Line Driver (LD485S-MP) to up to 64 locations!

With its RS-485 line interface, this driver delivers reliable signals, even in the most demanding shop environments - conveyor belts, time clocks, and more.

And the LD485S-MP is just as reliable in tail circuits, too. You get less jitter in Receive clocking, a range of Transmit-clock select options, and delayed RTS/CTS settings.

Front-panel LEDs indicate flow-control status. And three front-panel pushbuttons perform line and digital loopback testing.

Choose a standalone model or a rackmount card. Use the card with our 16-Card Interface Converter Rack (RM005).

Tech Specs

This product works with:
• GigaBase® 350 CAT5e, 350-MHz Bulk Cables, 4-Pair (EYN851A)
• 16-Card Interface Converter Rack (RM005)
Questions? Contact our FREE Tech Support.

* Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 1300 73 55 66.



Double Diamond Warranty Diamond

Double Diamond™ Warranty (Standard)

Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

The Double Diamond Warranty is our no-questions-asked warranty that protects your Black Box® brand products* from faulty workmanship and defects.

During the warranty period, Black Box Network Services will repair or replace your faulty equipment at NO CHARGE!

Plus, get an Extended Double Diamond Warranty.

You can also extend your warranty or protect a previously purchased Black Box® brand product* for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 1300-734-455.

** Certain products may not be eligible.


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