Product Overview
The Allen-Bradley 1784-PKTX is a network interface card designed for direct installation into the PCI port of a personal computer. This industrial automation module enables a host computer to connect to Data Highway Plus (DH+), Remote I/O (RIO), and DH-485 communication networks, providing a reliable bridge for programming, monitoring, and process visualization with Allen-Bradley PLC systems.
With PCI 2.3 compliance, the 1784-PKTX supports a maximum of four modules per system and features one diagnostic/status LED per channel. Its compact design and conformal coating ensure durability in demanding industrial environments.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Part Number |
1784-PKTX |
| Brand |
Allen-Bradley |
| Description |
Network Interface Card |
| Communication Protocol |
Data Highway Plus (DH+); Remote I/O (RIO); DH-485 |
| Communication Channels |
Channel 1A: DH+ / RIO; Channel 1C: DH-485 |
| PCI Port |
PCI 2.3 compliant |
| Compatible Controllers |
PLC-5, PLC-5/250, SLC 5/04 processors, and SLC 5/01, SLC 5/02, SLC 5/03 (via 1785-KA5) |
| Remote I/O Scanner |
Supported |
| Max Modules per System |
4 |
| Status LEDs |
1 diagnostic/status LED per channel |
| Dimensions |
4.5 x 12.4 x 6.3 in (115 x 317 x 160 mm) |
| Weight |
0.3 lbs (0.1 kg) |
| Coating |
Conformal Coat |
| Typical AC Signal Delay (Off) |
29 (±8) ms |
| Typical DC Signal Delay (Off) |
30 (±7) ms |
| Channels |
1A: 3-pin Phoenix for DH+ & RIO; 1C: 6-pin Phoenix for DH-485 |
For DH+ / RIO networks, the 1784-PKTX supports cable lengths up to 10,000 ft (3048 m) at 57.6 kbit/s, 5,000 ft (1524 m) at 115.2 kbit/s, and 2,500 ft (762 m) at 230.4 kbit/s. On DH-485, it reaches 4,000 ft (1219 m) at baud rates of 1200, 2400, 4800, 9600, or 19,200 bit/s.
Industry Applications
The 1784-PKTX excels in applications requiring reliable communication between a PC and legacy Allen-Bradley PLCs. Typical use cases include:
-
Process Visualization: Connect a PC running HMI software to PLC-5 or SLC 500 systems via DH+ or DH-485 for real-time monitoring and control.
-
Remote I/O Control: Use the RIO scanner capability to manage remote racks and I/O modules over long distances, reducing wiring costs.
-
System Integration: Bridge existing DH+ or DH-485 networks to modern PC-based tools for programming, data acquisition, and diagnostics.
In a typical upgrade scenario, replacing older interface cards with the 1784-PKTX provides a cost-effective path to maintain legacy systems while leveraging modern PC capabilities.
Installation & Setup
Installing the 1784-PKTX is straightforward. Follow these steps:
- Power off the host computer and open the chassis.
- Insert the card into a free PCI 2.3-compliant slot.
- Secure the card and replace the chassis cover.
- Connect the appropriate cable: use the 1784-CP12 (3-pin Phoenix, switchable termination) for DH+ devices, or the 1784-CP14 (6-pin Phoenix, switchable termination) for DH-485 networks.
- Configure the RSLinx PKTx driver and set the correct termination resistors as needed.
Ensure the host system meets the operating system requirements and that no more than four modules are installed per system.
Maintenance & Reliability
The 1784-PKTX is built with conformal coating, protecting it from moisture and dust. To ensure long-term reliability:
- Periodically inspect cable connections and termination resistors.
- Keep the card and PCI slot free of debris.
- Monitor the status LEDs for channel health.
- Store spare cards in anti-static packaging when not in use.
With proper maintenance, this card delivers dependable performance, reducing downtime and total cost of ownership.
Compatibility & Integration
The 1784-PKTX integrates seamlessly with Rockwell Automation ecosystems. It supports PLC-5, PLC-5/250, and SLC 5/04 processors directly, and SLC 5/01, 5/02, and 5/03 via the 1785-KA5 module. It works with DH+, RIO, and DH-485 networks, making it versatile for mixed-protocol environments.
Buying Guide
Before purchasing the 1784-PKTX, verify your host computer's PCI slot availability and confirm the required communication protocols. Ensure you have the correct cables (1784-CP12 or 1784-CP14) and that your software supports the RSLinx PKTx driver. For reliable sourcing and competitive pricing, PLC Source PRO offers genuine Allen-Bradley parts with fast shipping.