Description:The 1784-PKTS (and 1784-PKTS/A) is a legacy PCI-bus industrial communication interface card from Allen-Bradley (Rockwell Automation). It is specifically designed to allow a standard industrial PC to function as a Remote I/O (RIO) Scanner on an Allen-Bradley Universal Remote I/O network. Unlike the more common 1784-PKTX, the PKTS variant is optimized for scanner applications, enabling the PC to directly read from and write to remote I/O blocks (like 1771 I/O racks) as if they were local to the computer, facilitating PC-based control and high-speed data acquisition.Application Scenarios:In a legacy steel mill, a critical quenching process is controlled by an industrial PC running a custom HMI/SCADA application. The PC is equipped with a 1784-PKTS/A card, which scans a remote 1771-ASB adapter module located 500 meters away in a high-temperature zone. The 1771 rack houses analog input modules reading thermocouples and digital output modules controlling water valves. The 1784-PKTS card allows the PC to execute the control logic directly, polling the I/O racks in real-time over the robust twinaxial RIO network, providing deterministic control without the need for a separate PLC-5 processor.
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1784-PKTS / 1784-PKTS/A (Revision A) |
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Product Category | PCI Industrial Communication Interface Card |
| Primary Function | Remote I/O (RIO) Scanner (PC as Master) |
| Host Interface | PCI Bus (Rev 2.3, 32-bit, 5V), Plug and Play |
| Communication Protocols | Allen-Bradley Remote I/O (RIO), Data Highway Plus (DH+), DH-485 |
| Physical Ports | 1x 3-pin Phoenix (Channel 1A) for DH+/RIO; 1x 6-pin Phoenix (Channel 1C) for DH-485 |
| Data Rates | RIO/DH+: 57.6K, 115.2K, 230.4K bps; DH-485: 1200-19.2K bps |
| Network Distance | Up to 10,000 ft (3,048 m) @ 57.6K bps (with Belden 9463 cable) |
| Configuration Software | RSLinx Classic, 6001-RIO Toolkit (for custom driver development) |
| Operating System | Legacy Windows (95, NT, 2000, XP) |
Technical Principles and Innovative Values:
- Innovation Point 1: PC as a Programmable Controller. The 1784-PKTS‘s core innovation is its RIO Scanner firmware. It allows a standard industrial PC to emulate the scanning function traditionally performed by a PLC-5 or SLC processor. This enables “soft PLC” architectures where the control logic resides in the PC (e.g., using Rockwell’s 6001-RIO Toolkit or third-party SCADA), reducing hardware costs and simplifying integration with upper-level MES/ERP systems by having control and data logging on the same platform.
- Innovation Point 2: Multi-Protocol PCI Integration. The card combines support for three critical legacy A-B networks (RIO, DH+, DH-485) into a single, standardized PCI form factor. Its Plug and Play design eliminated the complex IRQ and base address jumper settings required by older ISA cards (like the 1784-KTS), significantly reducing installation time and configuration errors in maintenance and upgrade scenarios.
- Innovation Point 3: Deterministic Data Acquisition. For data-intensive applications, the 1784-PKTS provides a direct, high-speed path between the I/O rack and the PC’s memory via the PCI bus. This bypasses the slower, message-based communication of DH+, allowing for real-time monitoring and control of I/O states with predictable scan times, which is critical for process control and high-speed machine diagnostics.
