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1784-KTXD

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Allen-Bradley 1784-KTXD is a dual-channel ISA communication card for DH+, DH-485, and remote I/O scanner applications in compatible host computers.
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Technical specifications for 1784-KTXD

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1784-KTXD
  • Product Family:
    PLC-5
  • Product Type:
    Dual-Channel DH+/DH-485 and Remote I/O Interface Card
  • Stock:
    1
  • Form Factor:
    Half-size ISA communication interface card
  • Host Slot:
    16-bit ISA or EISA
  • Communication Channels:
    Two
  • Channel 1 Functions:
    DH+, DH-485, or remote I/O scanner
  • Channel 2 Functions:
    DH+ or remote I/O scanner
  • Network Bridging:
    Not supported between the two channels
  • Compatible Processor Families:
    PLC-5 and SLC on supported networks
  • Power Dissipation:
    600 mA at 5 V DC, 3.15 W
  • Operational Slot Temperature:
    0 to 60 °C
  • Dimensions:
    2.2 × 17.2 × 12.6 cm
  • Weight:
    0.16 kg
  • Tariff Code:
    8517623990
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Channel Assignment Host Resources Commissioning Application
  • Consolidates two independently assigned Allen-Bradley network connections in one industrial computer
  • Allows the host to perform separate engineering, data-exchange, or remote I/O duties through one installed card
  • Keeps the two communication paths logically separate so each network retains its own operating role

1784-KTXD gives a compatible industrial computer two separately managed interfaces for communicating with supported Allen-Bradley controllers and I/O equipment.

The dual-channel arrangement is intended for host systems that must maintain two network paths without passing traffic directly from one channel to the other.

During replacement, preserve the relationship between each physical cable, host driver, and assigned network task, then prove both paths independently before returning the computer to operation.

Availability, condition, price, and shipping time for 1784-KTXD are confirmed during quotation.

Allen-Bradley 1784-KTXD Dual-Channel DH+/DH-485 and Remote I/O Interface Card Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Channel 1 supports DH+, DH-485, or remote I/O scanner operation.
  • Channel 2 supports DH+ or remote I/O scanner operation.
  • The two channels do not bridge traffic from one network to the other.
  • Install the card only in a compatible 16-bit ISA or EISA slot.
  • Reserve independent base-memory and interrupt resources for the configured channels.
  • Check BIOS shadowing and other installed adapters before assigning resources.
  • Restore the saved mode, station address, baud rate, and driver for each channel.
  • Confirm the correct connectors, cable polarity, and termination for both networks.
  • Validate each channel independently with the documented diagnostic utility.
  • Two independent DH+ communication paths in a compatible host computer.
  • DH-485 communication on channel 1 with a separate DH+ or remote I/O channel.
  • Dual-channel PC-based remote I/O scanner applications.
Description
Allen-Bradley 1784-KTXD is a dual-channel ISA communication card for DH+, DH-485, and remote I/O scanner applications in compatible host computers.

Channel 1 supports DH+, DH-485, or remote I/O scanning, while channel 2 supports DH+ or remote I/O; both channels require separate host resources and cannot be used as a bridge between networks.

Before replacement, document both channel modes, base-memory addresses, interrupts, station and baud settings, cables, termination, driver configuration, and host slot resources.
Alternative Names
1784-KTXD 1784KTXD 1784 KTXD Allen-Bradley 1784-KTXD Allen Bradley 1784-KTXD AB 1784-KTXD
Technical notes
1784-KTXD installation requires a 16-bit ISA/EISA slot, separate resources and settings for both channels, correct DH+/DH-485/RIO assignments, cabling, termination, and drivers; the channels cannot bridge networks.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How should a buyer confirm the two channel duties on Allen-Bradley 1784-KTXD?
Record each channel separately: channel 1 may use DH+, DH-485, or remote I/O, while channel 2 may use DH+ or remote I/O but not DH-485.
Can Allen-Bradley 1784-KTXD use channel 2 for DH-485 when channel 1 is already assigned?
No. DH-485 is supported only on channel 1; channel 2 is limited to the documented DH+ or remote I/O functions, so the two network duties must be planned before installation.
What host resources must be preserved for Allen-Bradley 1784-KTXD?
Document both base-memory selections, interrupt assignments, slot, BIOS memory exclusions, driver configuration, and any other adapter resources that could conflict.
Can Allen-Bradley 1784-KTXD use the KTX direct PLC-2 or PLC-3 connection?
No. The official manual assigns direct PLC-2 and PLC-3 connections to KTX and specifically excludes KTXD from that direct-connect operation.
What should be checked if only one Allen-Bradley 1784-KTXD channel works after replacement?
Verify that channel's mode, memory address, interrupt, station and baud settings, connector wiring, termination, software driver, and network-specific configuration.
How should remote I/O be commissioned on Allen-Bradley 1784-KTXD?
Match the existing rack addresses, scanner configuration, rate, cable polarity, termination, adapter settings, and controlled I/O behavior for each channel used as a scanner.
What design assumption should be avoided when specifying Allen-Bradley 1784-KTXD?
Treating its two channels as identical or as a network bridge can produce an unusable design because DH-485 is limited to channel 1 and inter-channel bridging is unsupported.