Application Scenarios
In a food processing plant, maintenance engineers faced recurring downtime due to a fragmented control setup that used separate power supplies, terminal blocks, and discrete relays for a packaging line. The integration of the Allen‑Bradley 1764‑24AWA consolidated these components into a single base unit, directly powering twelve 120V AC sensors while its 12 relay outputs actuated conveyor motors and solenoid valves. The result was a 30% reduction in cabinet footprint and a significant drop in wiring errors during installation, as technicians could now connect field devices directly to the clearly labeled terminals on the 1764‑24AWA.
This base unit excels in applications where simplicity and reliability are paramount – from simple material handling equipment and packaging machinery to HVAC control panels and irrigation systems. Its wide AC input range (85‑265V AC, 47‑63 Hz) makes it suitable for global deployment without voltage selection switches.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1764‑24AWA |
| Manufacturer | Allen‑Bradley / Rockwell Automation |
| Product Category | Controller Base Unit (integrated power supply + embedded I/O) |
| Input Voltage Range | 85‑265V AC, 47‑63 Hz – global mains compatibility |
| Power Consumption | 70 VA – energy‑efficient for continuous operation |
| Integrated Inputs | 12 x 120V AC discrete inputs (79‑132V AC operational range) |
| Integrated Outputs | 12 x relay outputs (5‑264V AC / 5‑125V DC, 2.5A continuous per point) |
| User Power Output | None – designed for self‑contained operation |
| Expansion Capability | Supports up to 8 x 1769 Compact I/O modules (max ~512 I/O points) |
| Operating Temperature | 0 to 55°C (32 to 131°F) – suitable for industrial control rooms |
| Mounting Type | DIN rail or panel mount – flexible installation options |
| Dimensions (H×W×D) | 138 × 168 × 87 mm (approx.) – compact footprint |
Technical Principles and Innovative Values
Innovation Point 1: Two‑Piece Modular Architecture
Unlike fully integrated micro‑PLCs, the 1764‑24AWA separates the base unit (I/O + power) from the processor module. This allows users to upgrade memory and processing power independently – choose the 1764‑LSP (7.65K words) or 1764‑LRP (14K words) without changing the I/O configuration. This flexibility extends system lifespan and reduces upgrade costs.
Innovation Point 2: Integrated AC Input Conditioning
The 1764‑24AWA features 12 AC inputs with built‑in filtering and isolation, accepting 79‑132V AC directly from field sensors such as proximity switches and photoelectric sensors. Inputs are fully optically isolated, with nominal impedance of 10‑12 kΩ, ensuring reliable operation in electrically noisy environments.
Innovation Point 3: High‑Reliability Relay Outputs
The 12 relay outputs on the 1764‑24AWA are rated for 2.5A continuous per point and can handle make currents up to 15A at 120V AC. This allows direct switching of contactors, solenoids, and indicator lamps without external interposing relays, reducing component count and cost per control point.
Innovation Point 4: Proven Industrial Certifications
The 1764‑24AWA carries UL 508, CSA C22.2, and Class I Division 2 hazardous location certifications, making it suitable for use in diverse industrial environments including chemical plants and oil & gas facilities where safety compliance is mandatory.
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