Allen-Bradley MicroLogix 1100 & 1400: Parts, Modules & End-of-Life Strategy
Overview
The Allen-Bradley MicroLogix 1100 and 1400 PLCs have been staples in industrial automation due to their versatility and reliability. As these units approach their end-of-life, plant managers and controls engineers must strategize on replacements and migration paths. This guide will discuss the capabilities and specifications of the MicroLogix 1100, the enhancements found in the MicroLogix 1400, and the role of 1762 expansion modules. Additionally, we will explore strategies for handling the end-of-life transition.Allen-Bradley MicroLogix 1100
The Allen-Bradley MicroLogix 1100 offers a compact solution for small to medium-sized applications. It supports EtherNet/IP communication, making it suitable for networked environments. With the capability to handle up to 1762 expansion modules, it provides scalability for growing applications.| Specification | Details |
|---|---|
| CPU Memory | 10KB User Program, 4KB User Data |
| Scan Time | 1.5 ms/K |
| I/O Capacity | Built-in 10 I/O, expandable with 1762 modules |
| Communication Ports | 1x EtherNet/IP, 1x RS-232/RS-485 |
| Voltage | 24V DC |
| Current Draw | 300 mA at 24V DC |
When upgrading from a MicroLogix 1100, consider the Allen-Bradley CompactLogix 5380 PLC Processor Module 5069-L340ER for enhanced processing power and modern communication options.
Allen-Bradley MicroLogix 1400
The MicroLogix 1400 builds on the strengths of the 1100 by offering increased I/O capabilities and additional communication ports. It supports up to 32 digital inputs and 20 outputs, making it ideal for more demanding applications. The built-in LCD display provides real-time diagnostics and easy monitoring.Ensure compatibility of 1762 expansion modules with the MicroLogix 1400 before integration to avoid system failures.
1762 Expansion Modules
1762 modules are pivotal in expanding the functionality of both the MicroLogix 1100 and 1400 PLCs. These modules can add analog I/O, high-speed counters, and additional digital I/O.| Module Type | Part Number | Functionality |
|---|---|---|
| Analog Input | 1762-IF2OF2 | 2 Inputs, 2 Outputs |
| Digital Output | 1762-OW8 | 8 Outputs |
| High-Speed Counter | 1762-IQ16 | 16 Inputs |
End-of-Life Strategy
As the MicroLogix series approaches end-of-life, planning for migration is crucial. Evaluate the cost-effectiveness of a like-for-like replacement versus a complete system upgrade. Consider the availability of spare parts and the potential risk of downtime due to obsolete components. Utilize resources like Allen Bradley 1764-28BXB MicroLogix1500 PLC I/O Module for compatible replacements.Implementing a phased migration can minimize operational disruptions while transitioning from the MicroLogix series to newer PLC platforms.
FAQs
Yes, the MicroLogix 1100 can use 1762 expansion modules to enhance its I/O capabilities.
The MicroLogix 1400 can support up to 32 digital inputs and 20 outputs.
EtherNet/IP allows for seamless integration into networked environments, enabling remote monitoring and control.
Alternatives include the Allen Bradley 1732ES-IB12XOB4 Armorblock I/O Module and the CompactLogix series for modern applications.
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