Product Overview

The Allen-Bradley 1764-24AWA serves as the fundamental hardware foundation for the MicroLogix 1500 programmable logic controller system. This base unit provides the necessary power supply, embedded input/output points, and the interface housing required to host 1764-LSP or 1764-LRP processor units. Engineered for versatility in small-to-mid-sized industrial automation, the 1764-24AWA integrates high-voltage AC inputs and robust relay outputs into a single compact footprint.

By utilizing a split-module design, the 1764-24AWA allows users to replace or upgrade the processor without disturbing the field wiring connected to the base. This architecture optimizes maintenance efficiency and provides a scalable path for expanding I/O capacity through the 1769 Compact I/O platform.

Integrated I/O and Electrical Performance

The base unit features 24 integrated I/O points designed to handle standard industrial voltage levels directly, reducing the need for interposing relays in many applications.

• Embedded Inputs: 12 points at 120V AC (Operating range: 79–132V AC).

• Embedded Outputs: 12 relay outputs, including two isolated relays for multi-voltage circuit control.

• Input Response: Fixed 20ms hardware filtering for reliable signal debouncing.

• Relay Capacity: Supports up to 8A per common and 1440VA break capacity.

• Power Supply: Integrated wide-range AC supply supporting 85–265V AC at 47–63 Hz.

• Power Consumption: Maximum 70VA load.

Expansion and System Integration

The 1764-24AWA is designed to grow alongside your application requirements, supporting both local and distributed I/O architectures.

• Local Expansion: Supports up to 8 1769 Compact I/O modules connected directly to the right side of the base.

• Total System Capacity: Capable of managing up to 512 I/O points with additional expansion banks.

• Networking: Built-in RS-232 port (Channel 0) supporting DF1, DH-485, and Modbus RTU protocols.

• Advanced Connectivity: Compatible with 1761-NET-ENI for EtherNet/IP communication and 1769-SDN for DeviceNet scanner integration.

• Safety Standards: Certified for UL, CE, and C-Tick; rated for Class I Division 2 hazardous locations.

Environmental and Physical Specifications

Built for rugged industrial environments, the unit is suitable for DIN-rail or panel mounting in high-density control cabinets.

• Dimensions: 138 x 158 x 87 mm (Base unit with typical processor installed).

• Operating Temperature: 0°C to 55°C (32°F to 131°F).

• Vibration Resistance: 2g operational vibration at 10–500Hz.

• Mounting Type: 35mm DIN-rail or screw-mount capability.