Application Scenarios
In a small industrial oven or heater control panel, the 1764-24AWA provides a complete control backbone. The 12 built-in 120V AC inputs are wired directly to the oven’s door limit switches, temperature thermostat contacts, and pushbuttons, eliminating the need for an external input module. The 12 relay outputs control the heater contactors (using the AC switching capability) and cooling fan relays (using the DC switching capability). The integrated power supply powers the logic, while the RS-232 port connects to a local HMI for temperature setpoint adjustment. This all-in-one design reduces the panel footprint and simplifies wiring for OEM equipment builders.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1764-24AWA |
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Product Family | MicroLogix 1500 |
| Unit Type | Controller Base Unit (Requires separate Processor) |
| Embedded I/O | 12 Inputs (120V AC) + 12 Outputs (Relay) |
| Input Voltage | 120V AC (79-132V AC operating range) |
| Output Type | Electromechanical Relay (Form A, SPST-NO) |
| Output Rating | 2A @ 250V AC / 2A @ 30V DC (per point) |
| Line Power Supply | 85-265V AC, 47-63 Hz |
| Internal DC Power | 24V DC @ 1.0A max (for external sensors) |
| Communication Port | RS-232 (Channel 0, DF1 protocol) |
| Expansion Capability | Supports local and remote I/O expansion |
| Compatible Processors | 1764-LSP, 1764-LRP series |
| Operating Temperature | 0°C to 55°C (32°F to 131°F) |
| Mounting | DIN Rail or Panel Mount |
| Status | Discontinued (End of Sale: June 2017) |
Technical Principles and Innovative Values
Innovation Point 1: Integrated All-in-One Architecture. Unlike modular PLCs where power, CPU, and I/O are separate, the 1764-24AWA base unit integrates the power supply and fixed I/O into the controller chassis. This design significantly reduces the number of components required for a basic control system, lowering hardware costs and panel space for OEM machine builders.Innovation Point 2: Flexible Relay Output Design. The 12 relay outputs are not limited to a specific voltage type. Each output can switch either AC (up to 250V) or DC (up to 30V) loads, providing exceptional wiring flexibility. This allows designers to control a mix of high-voltage AC devices (like motor starters) and low-voltage DC devices (like solenoid valves) from the same base unit without additional interposing relays.
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