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Allen-Bradley 1784-PCIC ControlNet PCI Communication Card
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- Part Number: 1784-PCIC
- Brand: Allen-Bradley
- Type: Communication Cards
- Barcode: USA
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Product Description
The Allen-Bradley 1784-PCIC, also cataloged as the 1784-PCIC ControlNet PCI Communication Card, operates as a dedicated hardware component for high-speed network interfacing and data exchange within PLC-5 and PC-based control platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1784-PCIC |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.31 lbs (0.60 kg) |
| Dimensions | Standard PCI Card Form Factor |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Dissipation | 3.5 W |
| Input Voltage | Power Sourced via PCI Bus Slot |
| Interface Type | 32-bit Peripheral Component Interconnect (PCI) |
| Network Type | ControlNet (Coaxial Media) |
| Transmission Rate | 5 Mbps |
| Cable Type | 75-ohm RG-6/U Coaxial Cable |
| Rated Isolation Voltage | 50 V |
| ESD Immunity | 6 kV Contact Discharge, 8 kV Air Discharge |
| Vibration / Shock | 2 G @ 10-500 Hz / 30 G Operating (50 G Non-Operating) |
| Mounting | Standard Host PC PCI Slot / DIN Mount / Desktop Mount |
Deterministic Network Execution & PC Bus Integration
The 1784-PCIC connects directly into a standard 32-bit PCI slot on a host PC or industrial computer, transferring deterministic ControlNet data frames across the bus at a 5 Mbps transmission rate. Drawing all operational power directly from the host PCI bus slot (with a maximum power dissipation of 3.5 W), the card offloads time-critical network messaging and scheduled I/O traffic from the host CPU. Onboard galvanic isolation rated at 50 V protects internal PC circuitry against external electrical noise, cross-talk, and ground loops across coaxial network links.
Frequently Asked Questions
Q: How is the 1784-PCIC powered inside a host computer system?
A: The 1784-PCIC receives all required logic and communication power directly through the standard 32-bit PCI slot edge connector, eliminating the need for external power wiring.
Q: What physical cable media is required for connecting the 1784-PCIC to a ControlNet network?
A: The card interfaces with ControlNet coaxial networks using standard 75-ohm RG-6/U coaxial cable terminated with standard BNC connectors.
Field Installation Guidelines
- Electrostatic Discharge (ESD) Protection: Handle the 1784-PCIC card using an anti-static wrist strap connected to chassis ground. Do not touch edge connector contacts or onboard components to prevent ESD damage up to the 6 kV/8 kV limits.
- Host Slot Installation: Power down the host PC entirely before inserting the card. Firmly seat the 32-bit PCI edge connector into an available PCI expansion slot and secure the mounting bracket screw to ensure proper frame grounding.
- Coaxial Cable Connection: Connect RG-6/U 75-ohm coaxial cable taps to the BNC connectors on the card bracket. Verify that cable bend radiuses meet manufacturer specifications to avoid impedance degradation.
- Diagnostic Monitoring: Observe local LED status indicators on the card bracket upon host power-up to confirm network connection status and node address assignment.
- Enclosure Integrity: Ensure the host PC or industrial workstation is placed in an enclosure providing protection against airborne dust and conductive contaminants, as the card features an open-style chassis design.
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