Allen-Bradley 1762-L40BXB MicroLogix Programmable Controller

Product Overview

The 1762-L40BXB is a MicroLogix 1200 programmable controller from Allen-Bradley, part of Rockwell Automation's MicroLogix 1200 series. It features a 24VDC power supply and offers 24 inputs (20 standard 24VDC and 4 fast 24VDC inputs) and 16 outputs (8 relay, 7 24VDC FET, and 1 high-speed 24VDC FET). The controller includes an integrated power supply, an RS232 communication port via 8-pin mini DIN, and a built-in memory module (1762-MM1) for program storage. The 1762-L40BXB also includes four trimmer potentiometers for analog data simulation, adjustable with a small flathead screwdriver. Its compact design weighs only 1.09 kg (2.4 lbs) and dissipates 21 Watts of heat.

Application Scenarios

The 1762-L40BXB is ideal for small to medium-scale automation systems such as conveyor control, packaging lines, material handling, and process control. The fast inputs (0-20 kHz) suit high-speed counting and encoder applications. The relay outputs handle AC/DC loads, while FET outputs provide fast DC switching. The controller's built-in real-time clock option (via 1762-RTC) enables time-stamped data logging and scheduled operations. Typical industries include automotive, food and beverage, and manufacturing.

Technical Specifications

Manufacturer: Rockwell Automation, Brand: Allen-Bradley, Series: MicroLogix 1200. Power Supply: 24VDC (-15%, +10%), Class 2 SELV. Input Power: 24VDC. Number of Inputs: 24 (20 standard 24VDC sink/source, 4 fast 24VDC sink/source). Input Groups: Two groups – Group 0 for inputs 0-3, Group 1 for inputs 4-23. Input on-state voltage: 14-24VDC (fast), 10-24VDC (standard). Off-state voltage: 0-5VDC. Nominal impedance: 3.3 kΩ (fast), 2.7 kΩ (standard). Off-state leakage current: 1.5 mA. Number of Outputs: 16 (8 relay, 7 24VDC FET, 1 high-speed 24VDC FET). Output circuit type: Relay/FET. Relay contact rating: 24-125VDC, 120-240VAC. Mechanical cycles: 20,000,000. Heat dissipation: 21 Watts. Power supply usage: 82 VA. Power supply inrush: 120VAC 25A for 8 ms, 240VAC 40A for 4 ms. Current per group: 8 Amps maximum. Ambient operating temperature: 0 to 55°C. Dimensions: Height 90 mm (104 mm with DIN latch open), Width 160 mm, Depth 87 mm. Weight: 1.09 kg (2.4 lbs). Communication: RS232 via 8-pin mini DIN.

Installation and Maintenance Guide

Mount the controller on a standard DIN rail. Connect the 24VDC power supply to the designated terminals. Wire field devices to input and output terminals following the wiring diagram. Ensure total current per input group does not exceed 8 Amps. Use the RS232 port to connect a programming device (PC) running RSLogix 500 software. To adjust trimmer potentiometers, use a small flathead screwdriver to modify timer, counter, or analog values. The integrated memory module can be replaced by removing the front cover and inserting a new module (1762-MM1, 1762-RTC, or 1762-MM1RTC). Periodic maintenance includes checking power supply voltage, cleaning dust from vents, and verifying output relay operation.

Packing List

1 x Allen-Bradley 1762-L40BXB MicroLogix 1200 Programmable Controller
1 x User Manual
1 x Power Connector