Allen-Bradley 1762-L24AWA – Compact AC I/O PLC Controller | MicroLogix 1200 Series
Engineering Background
The MicroLogix 1200 family (Catalog Series 1762) is Rockwell Automation’s mid-range compact controller platform, engineered for discrete and process control applications where deterministic scan times, robust I/O flexibility, and seamless RSLogix 500 programming are required. The 1762-L24AWA variant is optimized for AC-powered installations with relay output switching, making it the preferred choice for machine builders and panel integrators working with 120/240 V AC field devices.
Product Positioning
The 1762-L24AWA occupies the sweet spot between entry-level micro-PLCs and full-rack modular systems. With 14 digital inputs, 10 relay outputs, onboard analog capability via expansion, and a native RS-232/RS-485 communication port, it delivers enterprise-grade control logic in a DIN-rail-mountable footprint — ideal for OEM machine control, conveyor systems, pump stations, and HVAC automation.
Complete Technical Specifications
| Catalog Number | 1762-L24AWA |
| Series / Platform | MicroLogix 1200 / Allen-Bradley 1762 Series |
| Manufacturer | Rockwell Automation / Allen-Bradley |
| Controller Type | Fixed I/O Compact PLC |
| Total Onboard I/O Points | 24 (14 DI + 10 DO) |
| Digital Inputs | 14 × 120/240 V AC, Sink/Source |
| Digital Outputs | 10 × Relay, Form A (SPST-NO), 2 A @ 240 V AC / 30 V DC |
| Power Supply Input | 120/240 V AC, 50/60 Hz |
| User Memory | 8 KB (Data + Program) |
| Program Scan Time | ~1 ms/K typical |
| Communication Ports | 1 × RS-232 (DH-485 / DF1 Full-Duplex / ASCII) |
| Expansion I/O Modules | Up to 6 × 1762 Series expansion modules |
| Real-Time Clock | Built-in (battery-backed) |
| Data File Types | Output, Input, Status, Binary, Timer, Counter, Control, Integer, Float, String, PID |
| Programming Software | RSLogix 500 / RSLogix Micro (Ladder Diagram) |
| Operating Temperature | 0 °C to +60 °C (32 °F to 140 °F) |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95% non-condensing |
| Enclosure Rating | IP20 (open type, panel-mount) |
| Mounting | DIN Rail (EN 50022) or Panel Mount |
| Dimensions (H × W × D) | 90 mm × 180 mm × 87 mm (approx.) |
| Weight | 640 g |
| Certifications | UL, CE, CSA, C-Tick |
| Rockwell Publication | 1762-UM001 (User Manual) |
Proven Application Environments
- Conveyor & Material Handling: Relay outputs directly drive motor starters and solenoid valves at 120/240 V AC without interposing relays.
- Pump & Compressor Stations: AC input compatibility matches pressure switches and float sensors wired at line voltage.
- HVAC & Building Automation: Real-time clock enables time-of-day scheduling; PID instruction supports temperature loop control via analog expansion.
- OEM Machine Control: Compact DIN-rail footprint and 6-module expansion bus accommodate custom I/O mixes without a full rack chassis.
- Packaging & Labeling Lines: High-speed counter inputs support encoder feedback and registration mark detection.
- Water & Wastewater Treatment: Robust AC I/O tolerates noisy field environments; RS-485 multi-drop enables SCADA integration.
Engineering Advantages
- Native AC I/O: Eliminates intermediate relay panels — inputs accept 120/240 V AC directly, reducing BOM cost and panel footprint.
- Relay Output Flexibility: Form A relay contacts switch AC or DC loads, supporting mixed-voltage field devices on a single controller.
- Expandable Architecture: Up to 6 × 1762 expansion modules (digital, analog, RTD, thermocouple, specialty) extend capability without controller replacement.
- RSLogix 500 Ecosystem: Full compatibility with Allen-Bradley’s mature programming environment, including online editing, forced I/O, and data monitoring.
- Battery-Backed RTC: Enables time-stamped event logging and scheduled control sequences without external timekeeping hardware.
- DH-485 Networking: Supports multi-node peer-to-peer networks up to 32 nodes for distributed machine architectures.
System Architecture & Signal Flow
The 1762-L24AWA operates as a standalone fixed-I/O controller or as the master node in a 1762 expansion bus. Field signals enter via the 14 AC digital inputs (screw-terminal wiring, 120/240 V AC, optically isolated). The CPU executes the ladder logic program in a continuous scan cycle, updating the output image table. The 10 relay outputs switch field loads directly. The RS-232 port connects to an HMI (PanelView), a PC running RSLogix 500, or a SCADA gateway via DF1 or DH-485 protocol. Expansion modules attach to the right side of the base unit via the 1762 expansion bus connector, sharing power and data with the CPU.
Sourcing & Quality Verification
- Units sourced from authorized distributors and verified OEM channels.
- Each unit inspected for: intact Rockwell Automation holographic label, correct catalog number and series marking, firmware version consistency, and physical condition (connector pins, housing, terminal blocks).
- Batch traceability maintained — date code and country of manufacture recorded at intake.
- Functional power-on test performed prior to shipment where applicable.
- Original packaging preserved where available; anti-static ESD packaging used for all shipments.
Procurement Process
- Step 1 — Inquiry: Submit your BOM or part number via the product page or email support@konmask.com with quantity and required delivery date.
- Step 2 — Quote: Receive a formal quotation within 1 business day including unit price, lead time, and shipping options.
- Step 3 — Order Confirmation: Approve the quote; proforma invoice issued for payment processing.
- Step 4 — Quality Check & Dispatch: Unit inspected, packed with ESD protection, and dispatched with tracking number.
- Step 5 — After-Sales Support: Technical support available via email or WhatsApp (+0086 19859288691) for installation and commissioning queries.
Technical FAQ
Q: Can the 1762-L24AWA accept 24 V DC inputs?
A: No. The -AWA suffix denotes AC input / AC power supply / relay output. For 24 V DC sink/source inputs, specify the 1762-L24BXB or 1762-L24BWA variants.
Q: How many expansion modules can be added?
A: Up to 6 × 1762 Series expansion modules (e.g., 1762-IF4, 1762-OW16, 1762-IQ16) can be connected to the right side of the base unit.
Q: Is RSLogix Micro compatible with this controller?
A: Yes. Both RSLogix 500 (full) and RSLogix Micro (free, limited) support the MicroLogix 1200 family. Studio 5000 does NOT support this platform.
Q: What communication protocols are supported?
A: DF1 Full-Duplex, DF1 Half-Duplex Master/Slave, DH-485, and ASCII via the onboard RS-232 port. Modbus RTU is supported via MSG instruction with appropriate configuration.
Q: Is this unit new or refurbished?
A: Please confirm with our team at the time of inquiry. We supply both new OEM stock and professionally tested surplus units, clearly identified in the quotation.
Q: What is the warranty?
A: 12-month warranty against manufacturing defects. DOA units replaced within 7 business days of confirmed receipt.
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