The Allen-Bradley 1784-KTXD, also cataloged as the 1784KTXD Communication Interface Card, operates as a dedicated hardware component for DH+ and DH-485 network communication within PLC-5 control system platforms.

Model Identification

The 1784-KTXD is an ISA half-sized communication interface card designed for installation in a 16-bit ISA or EISA expansion slot. The card provides two communication channels with support for DH+ and DH-485 networks, including remote I/O scanner functionality for Allen-Bradley control architectures.

Hardware Specifications

Communication Interface Features

The 1784-KTXD provides PC-based access to Allen-Bradley industrial communication networks through ISA and EISA computer expansion architectures. The card supports two independent communication channels for connection to DH+ and DH-485 networks.

The module allows compatible computer systems to perform communication tasks including PLC data exchange, remote I/O scanning, and network monitoring. Communication parameters depend on the connected PLC system configuration and supported Allen-Bradley software environment.

For PLC-5 and related control platforms, the card operates as a network interface component between the computer expansion bus and industrial communication networks. Firmware and driver compatibility must be verified before system integration.

DH+ and DH-485 Network Integration

The 1784-KTXD supports Allen-Bradley Data Highway Plus and DH-485 communication protocols. These protocols provide serial network communication between PLC processors, operator interfaces, programming terminals, and remote I/O devices.

The dual-channel architecture allows connection flexibility for systems requiring multiple communication paths. Proper node addressing, cable installation, and network configuration are required for correct communication operation.

Ordering Information

• 1 x Allen-Bradley 1784-KTXD Communication Interface Card
• 1 x ISA / EISA half-sized expansion card assembly
• Additional communication cables, software, manuals, and configuration accessories are not included unless specifically listed

Field Installation Guidelines

Expansion Slot Installation

• Verify the host computer provides a compatible 16-bit ISA or EISA expansion slot.
• Remove electrical power from the computer before card installation.
• Install the card securely into the expansion slot connector.

Communication Wiring

• Use compatible DH+ or DH-485 communication wiring methods.
• Maintain cable separation from high-voltage conductors.
• Confirm network termination and node configuration before operation.

Electrical Installation Practice

• Verify the 5 VDC supply capability from the host expansion bus.
• Avoid mechanical stress on card edge connectors.
• Follow standard grounding and shielding practices for industrial communication networks.

Frequently Asked Questions

• What communication protocols are supported by the 1784-KTXD?

The module supports Allen-Bradley DH+ and DH-485 communication networks for PLC and industrial device communication.

• How many communication channels are available?

The 1784-KTXD provides two communication channels for connection to supported Allen-Bradley network systems.

• What type of computer slot is required?

The card requires a compatible 16-bit ISA or EISA expansion slot in the host computer.

• Does the 1784-KTXD support remote I/O scanning?

Yes. The communication card includes remote I/O scanner functionality for supported Allen-Bradley network applications.

• What is the operating temperature range?

The specified operating temperature range is 0 deg C to 60 deg C.

• What power supply does the card require?

The card operates from the host expansion bus with a power requirement of 600 mA at 5 VDC.

• Can the card be installed while the computer is powered?

Hot installation is not specified. Power should be removed before inserting or removing the communication interface card.

• What affects DH+ and DH-485 communication performance?

Network wiring, node configuration, shielding, grounding, and compatible communication settings affect communication operation.