Product Overview

The Allen-Bradley 1762-L40BWA is a high-density, self-contained controller within the MicroLogix™ 1200 family, specifically engineered to provide extensive I/O capacity in a compact hardware footprint. This controller is a "Big-I/O" solution, featuring 40 integrated points consisting of 24 discrete 24V DC inputs and 16 high-reliability relay outputs. Powered by a universal 120/240V AC supply, it is designed for standalone machine control or as a networked node in distributed industrial architectures.

The 1762-L40BWA is built for scalability; it supports the addition of up to six 1762 expansion I/O modules, allowing the system to grow alongside your application requirements. With a field-replaceable battery and a flash-upgradeable operating system, this PLC ensures long-term operational viability for manufacturing, material handling, and building automation sectors.

Control and Connectivity Features

The 1762-L40BWA balances high-speed logic execution with versatile communication protocols, making it a flexible choice for modernizing legacy systems or implementing new automation cells.

• Flexible Input Configuration: The 24 inputs can be wired in either sinking or sourcing configurations. Four of these inputs are high-speed channels capable of 20 kHz latching, ideal for pulse-catching and simple motion feedback.

• Heavy-Duty Relay Outputs: Features 16 relay points capable of switching AC and DC loads. These relays are designed for longevity, rated for up to 20 million mechanical cycles under controlled conditions.

• Multi-Protocol Serial Port: The integrated 8-pin Mini-DIN RS-232C port supports DF1 Full-Duplex/Half-Duplex, DH-485, Modbus RTU (Master/Slave), and ASCII protocols for interfacing with HMIs, scanners, and other controllers.

• Memory Management: Includes 6KB of user-configurable memory (4KB for user program and 2KB for user data), ensuring enough space for complex instruction sets and data logging.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 1762-L40BWA

• Line Power: 120V to 240V AC (47–63 Hz)

• Total I/O count: 40 Points

• Discrete Inputs: (24) 24V DC (Sink/Source); 4 High-speed inputs

• Relay Outputs: (16) Normally Open (N.O.) Relays

• Operating Voltage (Outputs): 24–125V DC / 120–240V AC

• Expansion Capacity: Up to 6 1762-Series I/O Modules

• Communication: RS-232C (8-pin Mini-DIN)

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

• Dimensions: 19.5 x 12.5 x 9.5 cm

• Weight: 0.9 kg (1.98 lbs)

Industrial Durability and Environmental Protection

• Robust Shock Resistance: Rated for 30g operational shock and 5g vibration at 500 Hz, ensuring performance in high-impact machine environments.

• Advanced Protection: The unit is designed for installation in a minimum IP54-rated enclosure to shield the internal logic from dust, moisture, and chemical contaminants.

• Diagnostics: Front-panel LED status indicators provide immediate feedback on Power, Run/Fault status, Force, and I/O activity, streamlining the troubleshooting process.

• Program Port Security: Includes a protected communication toggle that allows users to switch between user-defined and factory-default communication settings to ensure connectivity during maintenance.