Description
Product Introduction & Engineering Value
Modern laptops rarely include the hardware needed to communicate with legacy PLC-5 and SLC 500 networks. The controller may still be operating perfectly, but without a compatible interface card, online troubleshooting becomes impossible.
The Allen-Bradley 1784-PKTXB (Series B) was developed to solve exactly that problem. Installed in a standard PCI slot, it provides reliable communication between engineering software such as RSLinx Classic and legacy Rockwell networks including Data Highway Plus (DH+), DH-485, and Remote I/O (RIO). Although the product has reached its lifecycle end, it remains a common maintenance tool in facilities operating mature automation systems.
Technical Specifications
| Specification | Value |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Catalog Number | 1784-PKTXB |
| Hardware Revision | Series B |
| Product Family | 1784 PKTx |
| Product Type | PCI Network Interface Card |
| Host Bus | Universal PCI 2.3 |
| Communication Channels | 1 |
| Supported Networks | DH+, DH-485, Remote I/O (RIO) |
| DH+/RIO Connector | 3-pin Phoenix |
| DH-485 Connector | 6-pin Phoenix |
| Maximum Cards per PC | 4 |
| Status Indicators | One diagnostic/status LED |
| Power Source | PCI Bus |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Relative Humidity | 5–95% non-condensing |
| Driver Support | Compatible with supported versions of RSLinx Classic |
| Product Lifecycle | Discontinued |
Technical specifications are derived from the Rockwell Automation PKTx User Manual and published technical data.
Field Application & The “Trench” Experience
During a scheduled shutdown at a cement plant, maintenance personnel needed to modify the ladder logic in a PLC-5 processor controlling the kiln feed system. The processor was operating normally, but none of the engineers could establish communication because their replacement laptops lacked a compatible network interface.
A maintenance workstation equipped with a 1784-PKTXB solved the problem immediately. After installing the correct PKTx driver and configuring the DH+ network parameters, the engineering team connected through RSLinx, uploaded the processor program, and completed the required logic modification before production resumed.
Typical applications include:
- PLC-5 migration projects requiring temporary DH+ access.
- Remote I/O diagnostics for legacy manufacturing lines.
- SLC 5/04 maintenance on DH-485 production networks.
- 1784-PKTXB
- 1784-PKTXB
Transparency SOP: QA & Testing
Each 1784-PKTXB is verified before shipment through a documented inspection process.
- Confirm the catalog number, Series B hardware revision, and manufacturer identification.
- Inspect the PCI edge connector, communication terminals, and PCB for mechanical damage.
- Install the card in a compatible industrial PC with a native PCI slot.
- Verify driver recognition using RSLinx Classic.
- Test communication over DH+, DH-485, and Remote I/O using reference controllers.
- Document communication performance, LED operation, and network diagnostics before the unit is classified as New Surplus or Refurbished.
The Veteran’s Tech Trap Guide
⚠️ A PCI Slot Is Required
The 1784-PKTXB is designed for a conventional 32-bit PCI slot, not PCI Express (PCIe). Many modern industrial computers no longer include legacy PCI expansion slots. Confirm the workstation hardware before purchasing a replacement.
⚠️ Network Driver Configuration Is Just as Important as the Hardware
Installing the card alone is not enough. The appropriate PKTx driver must be configured in RSLinx Classic, and the network baud rate and node parameters must match the existing DH+ or DH-485 network. Incorrect software configuration often appears to be a hardware failure.
PRO TIP: If multiple PKTx cards are installed in one workstation, configure the JP3 Card ID jumpers correctly. Duplicate card IDs can prevent Windows and RSLinx from recognizing every installed interface.
Dynamic FAQ
Q1. What industrial networks does the 1784-PKTXB support?
The card supports Data Highway Plus (DH+), DH-485, and Remote I/O (RIO) communication networks used with many PLC-5 and SLC automation systems.
Q2. Can the 1784-PKTXB be installed in a PCIe slot?
No. The card requires a standard PCI bus. Systems equipped only with PCI Express slots are not directly compatible.
Q3. Which engineering software typically uses this interface?
The card is commonly used with RSLinx Classic and legacy Rockwell Automation software for online programming, diagnostics, and controller maintenance.
Q4. Is the 1784-PKTXB still manufactured?
No. The 1784-PKTX family has been discontinued by Rockwell Automation. Existing systems are generally supported using New Surplus inventory or professionally refurbished units.
Q5. How is New Surplus inventory verified?
Each interface card is inspected for physical condition, PCI functionality, communication integrity, driver recognition, and successful operation on reference DH+, DH-485, and Remote I/O networks before shipment.
Q6. What is the most common installation mistake?
The most frequent issues are attempting to use the card in a PCIe-only computer, installing an unsupported operating system, or failing to configure the PKTx communication driver correctly. These problems should be eliminated before concluding that the hardware is defective.
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