Allen-Bradley 1762-L24AWA​ MicroLogix 1200 AC-Powered Controller for Material Handling & Process Skids

Technical Specifications

Main Features and Advantages

Integrated AC-powered architecture:​ Unlike many compact PLCs that require a separate 24VDC supply, the 1762-L24AWA​ runs straight from 120/240VAC mains, simplifying panel wiring and reducing component count. The 14 built-in 120VAC digital inputs directly sense standard industrial pilot devices—pushbuttons, selector switches, prox sensors—without interposing relays, while the 10 relay outputs give galvanic isolation and the freedom to switch both AC and DC loads within rating, a major advantage for mixed-voltage machine zones.Rugged relay output design:​ Each relay contact on the 1762-L24AWA​ is rated for up to 1440VA, with 8A per output group and a controller-wide cap of 30A at 150VAC / 20A at 240VAC. The mechanical relay life reaches 20 million cycles, and the minimum switched load of 10 mA keeps even low-current indication circuits reliable. With ON/OFF timing of 10 ms, the relays handle typical machine-level actuation without the wear concerns of solid-state alternatives in inductive-load environments.Communication flexibility:​ The onboard RS-232C port supports DF1 (point-to-point or master-slave), DH-485 (peer networking with PanelView terminals and other MicroLogix units), ASCII free-form messaging, and Modbus RTU slave operation. This makes the 1762-L24AWA​ equally at home talking to an HMI, daisy-chaining with sibling controllers, or sitting on a Modbus SCADA link—all without adding a communications card.Expansion-ready within the 1762 ecosystem:​ When the built-in 24 I/O points fall short, the 1762-L24AWA​ backplanes up to four 1762 expansion modules (additional digital, analog, or specialty I/O) while the 5V/24V auxiliary rails from the base supply help power low-draw add-ons. The 6 KB memory accommodates ladder logic, timer/counter blocks, and data handling routines typical of packaging machines, conveyors, pump controls, and small process loops.Industrial durability with proven pedigree:​ Designed for 0–55°C ambient, 5–95% non-condensing humidity, 1.5G vibration (relay-rated) and 15G operating shock, the 1762-L24AWA​ carries UL/cUL/CE markings and conforms to OvC II overvoltage category. Even post-discontinuation, its vast installed base means spare units, refurbished stock, and migration documentation (toward Micro850) remain accessible—critical for plants that cannot afford a full controls rewrite.

Application Field

The 1762-L24AWA​ is purpose-built for applications where a compact, AC-native PLC with relay outputs simplifies panel design and reduces ancillary components. In OEM packaging machinery—form-fill-seal, cartoners, labelers—the 14 AC inputs pick up 120V pilot devices directly while the 10 relays drive solenoids, contractor coils, and alarms, all from a single DIN-rail slice. Conveyor subsystems and material-handling cells use the 1762-L24AWA​ to coordinate photo-eye sensing, motor starters, and divert gates, with DH-485 networking linking multiple cells to a line-level HMI without extra comms hardware.In pump and fan control skids for water/wastewater and HVAC auxiliaries, the AC-input capability lets the 1762-L24AWA​ read float switches, pressure transducer interlocks, and manual isolators at 120VAC natively, while relay outputs stage pumps or modulate through contactor banks. Building automation panels leverage the same traits for lighting control, damper actuators, and utility monitoring where 120V coil devices dominate. Retrofit projects replacing obsolete relay logic or end-of-life SLC/mini-PLC hardware often land on the 1762-L24AWA​ because the 120/240VAC power and relay outputs map 1:1 to legacy wiring, minimizing rework. Even as Rockwell steers new designs toward the Micro850, the 1762-L24AWA​ remains the pragmatic choice for sustaining existing MicroLogix 1200 codebases and keeping spare-part continuity on active lines.