Allen-Bradley 1764-24AWA – MicroLogix 1500 Base Unit | 120/240VAC 24-Point Discrete I/O
Engineering Background
The Allen-Bradley 1764-24AWA is a base unit within Rockwell Automation’s MicroLogix 1500 platform — a mid-range programmable logic controller series engineered for demanding discrete and process control applications. The MicroLogix 1500 architecture separates the processor module from the base unit, enabling flexible I/O configuration and field-level serviceability without full system shutdown.
Product Positioning
The 1764-24AWA base unit provides 24 points of AC-rated discrete I/O (120/240VAC), making it the preferred choice for machine builders and system integrators who require robust relay-compatible inputs and high-current outputs in a compact DIN-rail form factor. It is widely deployed in North American and global industrial facilities across packaging, material handling, HVAC, and water treatment sectors.
Complete Technical Specifications
- Part Number / SKU: 1764-24AWA
- Series / Platform: MicroLogix 1500
- Manufacturer: Allen-Bradley / Rockwell Automation
- Module Type: Base Unit (processor module sold separately)
- Total I/O Points: 24 (discrete)
- Input Type: AC discrete inputs, 120/240VAC
- Output Type: AC relay outputs, 120/240VAC
- Input Voltage Range: 85–265VAC, 47–63Hz
- Output Voltage Range: 5–265VAC / 5–125VDC (relay contact)
- Output Current Rating: 2A per point (resistive load)
- Power Supply Input: 120/240VAC, 47–63Hz
- Backplane Communication: Proprietary MicroLogix 1500 backplane
- Compatible Processor Modules: 1764-LSP, 1764-LRP
- Expansion Capability: Supports up to 8 expansion I/O modules via 1769 Compact I/O
- Enclosure Rating: Open type (requires enclosure installation)
- Operating Temperature: 0°C to +60°C (32°F to 140°F)
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5–95% non-condensing
- Vibration Resistance: IEC 68-2-6 compliant
- Shock Resistance: IEC 68-2-27 compliant
- Mounting: DIN rail (EN 50022) or panel mount
- Dimensions (H × W × D): Approx. 90 × 160 × 87 mm
- Weight: Approx. 400 g
- Certifications: UL Listed, CE Marked, CSA Certified, RoHS Compliant
- Country of Origin: USA
Proven Application Environments
- Packaging Machinery: Conveyor sequencing, filling line control, reject gate actuation
- Material Handling: Sortation systems, palletizer control, elevator logic
- HVAC & Building Automation: Pump/fan motor control, damper sequencing, alarm management
- Water & Wastewater Treatment: Pump station control, level monitoring, dosing system logic
- Food & Beverage: Batch processing, CIP cycle control, temperature interlock
- OEM Machine Control: Retrofit and new-build applications requiring AC I/O compatibility
Engineering Advantages
- AC-Native I/O: Direct interface to 120/240VAC field devices — eliminates intermediate relay panels and reduces wiring cost
- Relay Output Durability: Mechanical relay contacts rated for high inrush loads; suitable for motor starters, solenoids, and pilot lights
- Modular Architecture: Processor and base unit are independently replaceable — reduces spare parts cost and downtime
- Compact Footprint: DIN-rail mounting with integrated I/O minimizes panel space versus discrete relay logic
- Broad Compatibility: Fully compatible with RSLogix 500 / Studio 5000 Logix Designer programming environments
- Long Service Life: MicroLogix 1500 platform has extensive installed base with continued Rockwell Automation support
System Architecture & Signal Flow
The 1764-24AWA base unit houses the I/O circuitry, power supply, and backplane interface. A compatible processor module (1764-LSP or 1764-LRP) plugs directly into the base unit’s processor slot. Field wiring connects to the removable terminal blocks on the base unit. The processor communicates with the base I/O and any attached 1769 Compact I/O expansion modules via the integrated backplane. Programming is performed via RSLogix 500 over RS-232 (Channel 0) or Ethernet (with 1764-LRP processor). The modular design allows the processor to be swapped without disturbing field wiring.
Sourcing & Quality Verification
- All units sourced from authorized distributors or verified surplus channels with documented chain of custody
- Pre-shipment inspection includes: visual examination, label authenticity verification, firmware version check (where applicable), and functional power-on test
- Packaging inspected for OEM integrity; units showing signs of counterfeit labeling, re-marking, or unauthorized repair are rejected
- Certificate of conformance available upon request for critical infrastructure procurement
- Konmask.com maintains a zero-tolerance policy on counterfeit components
Procurement Process
- Confirm Part Number: Verify 1764-24AWA matches your existing base unit or BOM requirement
- Check Processor Compatibility: Confirm your processor module (1764-LSP or 1764-LRP) is compatible
- Request Quote: Contact support@konmask.com with quantity and required delivery timeline
- Order Placement: Purchase order accepted via website checkout, email PO, or wire transfer
- Shipping: DHL / FedEx / UPS express available; EXW Xiamen or DAP destination terms negotiable for bulk orders
- Documentation: Commercial invoice, packing list, and CoC provided with every shipment
Technical FAQ
Q: Can the 1764-24AWA operate with 24VDC field devices?
A: No. The 1764-24AWA is designed exclusively for 120/240VAC discrete I/O. For 24VDC applications, refer to the 1764-24BWA (DC input / relay output) or 1764-28BXB (DC I/O) variants.
Q: Is a processor module included?
A: No. The 1764-24AWA is the base unit only. Processor modules (1764-LSP or 1764-LRP) are sold separately. Please contact us if you require a complete system.
Q: What programming software is required?
A: RSLogix 500 (legacy) or Studio 5000 Logix Designer with RSLogix 500 compatibility mode. A free RSLogix Micro Starter Lite license supports basic programming for MicroLogix platforms.
Q: What is the warranty on this unit?
A: Konmask.com provides a 90-day functional warranty on all verified units. Extended warranty terms available for volume orders — contact us for details.
Q: Can I expand I/O beyond the 24 base points?
A: Yes. The MicroLogix 1500 supports up to 8 expansion modules via the 1769 Compact I/O bus, allowing up to 256 additional I/O points depending on processor model.
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