Product Overview
The Allen-Bradley 1762-L24BXB is a discontinued MicroLogix 1200 programmable controller that integrates a processor, embedded digital I/O, and communication capability in a single compact unit. Part of Rockwell Automation’s MicroLogix family, the Allen-Bradley 1762-L24BXB was designed for small to medium machine-control applications where panel space, cost, and ease of programming were important. The controller provides 14 digital inputs and 10 relay or transistor outputs, depending on the exact variant, and can be expanded using compatible 1762 I/O modules.
The Allen-Bradley 1762-L24BXB is programmed using RSLogix 500 software and supports ladder logic development with familiar instructions, data handling, and communication functions. Its embedded I/O reduces the need for additional modules in straightforward control applications, while the expansion capability allows the system to grow as machine requirements change. A built-in RS-232 port provides programming access and supports point-to-point communication with other devices.
Although the MicroLogix 1200 series is no longer an active Rockwell Automation product, the Allen-Bradley 1762-L24BXB remains in service in many installed machines. Replacement units, surplus inventory, and compatible 1762 expansion modules are commonly sourced to maintain existing equipment. When specifying the Allen-Bradley 1762-L24BXB for a new project, engineers should confirm controller revision, firmware, I/O compatibility, and software availability, since the platform is considered legacy and may not be supported indefinitely.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 1762-L24BXB |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Type | MicroLogix 1200 Programmable Controller |
| Series | MicroLogix 1200 |
| Programming Software | RSLogix 500 |
| User Memory | 4 KB or 6 KB, depending on controller revision |
| Embedded Inputs | 14 digital inputs |
| Embedded Outputs | 10 digital outputs |
| Input Voltage | 24 V DC |
| Output Type | Relay or transistor, depending on variant |
| Communication Port | 1 RS-232 port |
| Expansion I/O | Up to 4 additional 1762 modules |
| Operating Temperature | 0 °C to 55 °C |
| Storage Temperature | -40 °C to 85 °C |
| Dimensions | 3.6 x 3.4 x 2.8 inches |
| Weight | Approximately 0.7 pounds |
Main Features and Advantages
Integrated control and I/O: The Allen-Bradley 1762-L24BXB combines a processor and 24 points of embedded I/O in a compact housing. This integration simplifies panel layout and reduces component count for small machines, conveyors, packaging equipment, and similar applications where a full-size rack-based controller would be unnecessary.
Expandable architecture: When application requirements grow, the Allen-Bradley 1762-L24BXB supports up to four additional 1762 expansion modules. This allows designers to add digital I/O, analog I/O, or specialty functions without replacing the entire controller. The expansion bus and mechanical interlock make module addition straightforward when the correct 1762 hardware is used.
RSLogix 500 programming environment: The Allen-Bradley 1762-L24BXB is developed using RSLogix 500, providing access to a mature instruction set and familiar programming workflow for technicians experienced with Allen-Bradley controllers. Ladder logic programs, data tables, and documentation can be managed within the established Rockwell Automation toolset.
Built-in serial communication: The onboard RS-232 port allows direct connection to a programming terminal and can be used for communication with HMIs, drives, printers, or other serial devices. For applications requiring greater connectivity, a DeviceNet scanner module can be added to the controller’s expansion group.
Legacy system value: For facilities with existing MicroLogix 1200 installations, the Allen-Bradley 1762-L24BXB provides a direct replacement path that preserves the original program, I/O configuration, and panel layout. This can reduce engineering and commissioning effort compared with migrating to a completely different control platform.
Application Field
The Allen-Bradley 1762-L24BXB is suited to discrete control applications with modest I/O counts and straightforward sequencing requirements. Common uses include small assembly machines, material handling systems, packaging equipment, pump and compressor skids, and building or facility automation. Its embedded 24-point I/O count is often sufficient for controlling motors, solenoids, indicator lights, and discrete sensors without additional expansion hardware.
In manufacturing environments, the Allen-Bradley 1762-L24BXB can coordinate conveyor sections, part feeders, clamping devices, and simple pick-and-place operations. The built-in RS-232 port supports connection to a terminal or HMI for local operator interaction, while expansion modules allow the controller to adapt to changing machine designs or additional sensing points.
The Allen-Bradley 1762-L24BXB is also relevant in retrofits and maintenance situations where the original controller must be replaced with a compatible unit. Because the MicroLogix 1200 platform is discontinued, system planners should weigh the short-term convenience of a like-for-like replacement against the long-term benefits of migrating to a supported platform such as Micro850 or CompactLogix, particularly when spare parts, programming software, or technical support become difficult to obtain.
