1762-L40BWAR | Allen-Bradley MicroLogix 1200 40-Point PLC Controlle

System Capabilities

The 1762-L40BWAR is a versatile and compact programmable logic controller (PLC) from the MicroLogix 1200 family, designed to handle moderate to complex automation tasks. This 40-point unit provides a high-density I/O count, featuring a mix of 24V DC discrete inputs and robust relay outputs. It is powered by a wide-range AC input, making it suitable for global industrial applications where varying voltage standards are present. The controller is engineered for field-expandability, allowing users to add 1762 expansion I/O modules to meet growing system requirements.

Technical Characteristics

• Manufacturer: Allen-Bradley / Rockwell Automation

• Product Series: MicroLogix 1200

• Model Number: 1762-L40BWAR

• Total I/O Count: 40 Points

• Input Specifications: 24 DC Inputs (20 standard and 4 high-speed ports)

• Output Specifications: 16 Relay Outputs (form A and form C)

• Operating Voltage: 120V to 240V AC (Operating range 85–264V AC)

• Input Circuit Type: Sink/Source (User-configurable)

• Relay Contact Rating: 24–125V DC; 120–240V AC

• Communication Interface: 8-pin mini-DIN RS-232 port

• Supported Protocols: DF1, DH-485, Modbus RTU Slave, and ASCII

• Inrush Current: 25A for 8ms (120V AC); 40A for 4ms (240V AC)

• Thermal Dissipation: 22 Watts

• Memory Type: 6KB non-volatile (User program and data)

• Mechanical Weight: 1.67 kg (3.69 lbs)

Operational Features and Programming

The 1762-L40BWAR is optimized for applications requiring reliable relay switching and high-speed counting. The four integrated high-speed inputs allow for interfacing with encoders or flow meters at rates up to 20 kHz. System configuration is typically performed using RSLogix 500 software, providing a stable ladder-logic environment for industrial sequencing and machine control. Its relay outputs are rated for over 20 million mechanical cycles, ensuring longevity in high-cycle packaging, material handling, and HVAC control systems.

Frequently Asked Questions

Does the 1762-L40BWAR support memory expansion?While the internal memory is fixed at 6KB, the unit supports the use of a 1762-MM1 memory module for program backup and transport between controllers.

Can I communicate with a modern PC without a serial port?To program the 1762-L40BWAR using a modern computer, a 1747-UIC (USB to DH-485) or a high-quality USB-to-RS232 converter (such as the 9300-USBS) is required to interface with the mini-DIN port.