1784-KTXD | Allen-Bradley | Data Highway Plus / DH-485 Communication Interface Card

Product Overview

The 1784-KTXD functions as a high-speed communication interface card that enables direct connectivity between an industrial PC and Allen-Bradley PLC networks. This dual-channel card supports both Data Highway Plus (DH+) and DH-485 protocols, acting as a powerful remote scanner and diagnostic tool. It allows personal computers to upload/download ladder logic, monitor real-time process data, and interface with HMI/SCADA software. We supply this unit as 100% Brand New and factory-original, ensuring the hardware integrity required to maintain aging legacy systems that rely on the ISA bus architecture.

Technical Specifications

The 1784-KTXD utilizes a specialized onboard processor to handle network polling and data framing, offloading the communication burden from the host computer's CPU.

Engineering Advantages

• Simultaneous Multi-Protocol Support: The 1784-KTXD manages two separate communication channels. This allows an engineer to monitor a DH+ network on one port while simultaneously troubleshooting a DH-485 link on the second, eliminating the need for multiple interface cards.

• Deterministic Data Throughput: The onboard intelligence manages the specific timing requirements of the DH+ token-passing protocol. This prevents data collisions and ensures that your HMI receives process updates with the precision required for high-speed industrial control.

• ISA Legacy Preservation: This card provides a direct solution for maintaining older industrial workstations. By utilizing 100% Brand New stock, you avoid the common failures of used ISA boards, such as oxidized edge connectors or degraded capacitors, which cause intermittent communication drops.

• Compact Half-Size Form Factor: The half-size ISA design fits into a wider variety of industrial PC chassis, including compact or shallow enclosures. This solves the physical constraints often encountered when retrofitting or repairing legacy machine-side controllers.

FAQs

• Does the 1784-KTXD require a specific driver version?

  Yes. You must use the RSLinx Classic drivers that support the KTXD hardware. Ensure your operating system remains compatible with ISA-bus legacy drivers, as modern 64-bit Windows environments typically do not support this hardware directly.

• Can I use this card to program SLC 500 and PLC-5 processors?

  Absolutely. The 1784-KTXD acts as the primary programming bridge for the PLC-5 (via DH+) and the SLC 500 family (via DH-485), providing full access to ladder logic and data tables.

• What should I check if the computer fails to recognize the card?

  Verify the DIP switch settings on the board for the Base Memory Address and Interrupt (IRQ). ISA cards require manual resource allocation; ensure these settings do not conflict with other hardware in your PC's BIOS or Device Manager.

• Is this a refurbished or repaired board?

  No. This unit is 100% Brand New. Unlike many surplus "KTXD" cards that show signs of previous installation or repair, our stock remains in pristine, original condition to guarantee maximum reliability in the field.