Application Scenarios
Consider a small municipal wastewater lift station that has run on a MicroLogix 1500 system for over a decade. The 1764-24AWA base unit inside the control cabinet handles twelve 120V AC inputs from float switches and pump run-status contacts, plus twelve relay outputs driving intermediate relay coils for pump starters. When a voltage surge damages the base unit, the maintenance team faces a familiar dilemma: the processor and program are still functional, but the base unit is no longer manufactured. A full migration to Micro800 would require rewriting logic, replacing the processor, and re-terminating field wiring. Sourcing a verified 1764-24AWA from surplus stock, by contrast, restores the station to service with no program changes and no downtime beyond the swap itself. For distributed, low-complexity sites like this, the 1764-24AWA’s value is not technical sophistication—it is the pragmatic continuity it provides to an installed base that still depends on it.
Parameter
| Main Parameters | Value / Description |
|---|---|
| Product Model | 1764-24AWA |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Product Category | MicroLogix 1500 Controller Base Unit (processor required) |
| Inputs | 12, 120V AC |
| Outputs | 12, relay type |
| Line Power | 85–265V AC |
| Input On-State Voltage | 79–132V AC at 47–63 Hz |
| Input Off-State Voltage | 0–20V AC |
| Input On-State Current | 12.0 mA nominal at 120V AC |
| Input Signal Delay | 20 ms on-delay; 20 ms off-delay |
| Relay Output Rating | 8 A per common (verify total VA limits) |
| Communication | RS-232C port (Channel 0) |
| Operating Temperature | 0°C to +55°C |
| Lifecycle Status | Discontinued (June 30, 2017) |
| Compatible Processors | 1764-LSP, 1764-LRP |
