Allen-Bradley 1784-PCIC – ControlNet PCI Communication Interface Card | Rockwell Automation 1784 Series
Engineering Background
The 1784-PCIC is a full-length PCI bus communication interface card developed by Rockwell Automation under the Allen-Bradley brand. It enables a standard PC workstation or industrial computer to participate directly on a ControlNet network — the deterministic, high-speed industrial Ethernet predecessor widely deployed across process, batch, and discrete manufacturing environments worldwide.
Product Positioning
Designed for system integrators, OEM machine builders, and plant engineers who require a reliable, low-latency PC-to-ControlNet bridge, the 1784-PCIC is the standard interface for RSLinx Classic and RSNetWorx for ControlNet configuration environments. It is the preferred choice for legacy ControlNet infrastructure maintenance, SCADA integration, and HMI connectivity in Rockwell Automation control architectures.
Complete Technical Specifications
- Part Number: 1784-PCIC
- Series / Platform: Allen-Bradley 1784 Series — ControlNet Interface
- Manufacturer: Rockwell Automation (Allen-Bradley)
- Bus Type: PCI (Peripheral Component Interconnect), full-length card
- Network Protocol: ControlNet (ANSI/IEC 61158 Type 2)
- Data Rate: 5 Mbps
- Node Address Range: 1–99 configurable nodes
- Connectors: Dual BNC coaxial (redundant media support)
- Redundant Media: Yes — supports redundant ControlNet cable topology
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Humidity: 5% to 95% non-condensing
- Power Consumption: 5V DC from PCI slot (≤ 1.5A typical)
- Weight: Approx. 140 g
- Compatible OS: Windows XP / Windows 7 / Windows 10 (32/64-bit with appropriate driver)
- Compatible Software: RSLinx Classic, RSNetWorx for ControlNet, Studio 5000 (via RSLinx)
- Catalog / Firmware: Refer to Rockwell Publication 1784-IN002
Proven Application Environments
- ControlNet-based PLC-5, SLC 500, and ControlLogix system programming and diagnostics
- SCADA / HMI workstation integration on ControlNet backbones
- RSNetWorx network scheduling and configuration from engineering PCs
- Redundant ControlNet media topology monitoring
- Legacy plant modernization projects requiring PC-to-ControlNet bridging
- Automotive, oil & gas, water treatment, and food & beverage process lines
Engineering Advantages
- Deterministic Communication: ControlNet’s scheduled messaging ensures cycle-accurate data delivery — critical for motion and process control.
- Redundant Media Support: Dual BNC ports allow full cable redundancy without additional hardware, maximizing uptime.
- Native Rockwell Integration: Recognized natively by RSLinx Classic — no third-party driver complexity.
- Full-Length PCI Form Factor: Compatible with standard industrial PCs and workstations with available PCI slots.
- Proven Field Reliability: Deployed in thousands of installations globally across critical infrastructure.
System Architecture & Signal Flow
The 1784-PCIC installs into a standard PCI slot on the host PC. The onboard ControlNet ASIC handles all network scheduling, MAC-layer framing, and media access independently of the host CPU. Data is transferred to the host via DMA over the PCI bus, minimizing CPU overhead. The dual BNC connectors interface directly to RG-6 coaxial ControlNet cable segments. RSLinx Classic acts as the device driver and communication server, exposing ControlNet nodes to any OPC-compliant SCADA, HMI, or programming application.
Signal Path: ControlNet Coax → 1784-PCIC BNC Port → Onboard ASIC → PCI DMA → RSLinx Classic → OPC/DDE → SCADA / Studio 5000
Sourcing & Quality Verification
- All units sourced from authorized distributors or verified industrial surplus channels.
- Each card undergoes visual inspection, label verification, and functional communication test prior to shipment.
- Firmware version and hardware revision documented upon request.
- Counterfeit screening performed — part markings, PCB silkscreen, and connector quality verified against OEM reference samples.
- Packaging: anti-static bag + foam-lined carton with humidity indicator card.
Procurement Process
- Step 1: Confirm your PC’s available PCI slot count and OS version before ordering.
- Step 2: Add to cart and complete checkout — we accept T/T bank transfer, PayPal, and major credit cards.
- Step 3: Receive order confirmation with tracking within 1 business day.
- Step 4: Typical lead time: in-stock units ship within 2–3 business days; EXW Xiamen or DDP available.
- Step 5: Download RSLinx Classic and 1784-PCIC driver from Rockwell’s Software Portal prior to installation.
- Volume pricing available for orders of 3+ units — contact us for a formal quotation.
Technical FAQ
Q: Is the 1784-PCIC compatible with Windows 10 64-bit?
A: Yes, with the correct Rockwell driver package (RSLinx Classic v3.90 or later). Verify driver signing requirements for your OS build.
Q: Can this card be used with ControlLogix systems?
A: Yes. The 1784-PCIC connects to any ControlNet node including ControlLogix 1756-CNB/CNBR modules, PLC-5/C, and SLC 5/05 processors.
Q: Does it support redundant ControlNet media?
A: Yes. Both BNC ports must be connected to the A and B cable segments respectively to enable redundant media operation.
Q: What is the maximum number of nodes supported?
A: ControlNet supports up to 99 nodes per segment (addresses 1–99); the 1784-PCIC occupies one node address.
Q: Do you provide a warranty?
A: Yes — 90-day functional warranty. DOA units replaced or refunded within 7 days of receipt.
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