MicroLogix 1000 vs. MicroLogix 1100
MicroLogix Controllers Overview
Allen-Bradley’s MicroLogix family is a line of compact Programmable Logic Controllers PLCs from Rockwell Automation, ideal for small-scale automation tasks. With five main series 1000, 1100, 1200, 1400, and 1500 each caters to different needs in terms of I/O, communication, and memory. MicroLogix 1000 is the most basic and cost-effective, while MicroLogix 1100 enhances functionality and flexibility.
MicroLogix 1000 Overview
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Memory: 1 KB shared for both program and data.
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Speed: 1.5 ms throughput for 500 instructions.
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Non-volatile storage: Built-in EEPROM.
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Comms: RS-232, DF1, DH-485 (via 1761-NET-AIC), optional EtherNet/IP (via 1761-NET-ENI), DeviceNet (via 1761-NET-DNI).
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I/O: Fixed analog and digital I/O, no expansion support.
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Certifications: CE, UL, C-Tick, c-UL, Class 1 Div 2.
MicroLogix 1100 Overview
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Memory: 8 KB (4 KB program + 4 KB data), 128K for data logging, 64K for recipe storage.
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Connectivity: Built-in 10/100 Mbps EtherNet/IP, online editing, embedded web server.
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Display: LCD with status messages, bit/integer editing.
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I/O: 10 digital inputs, 6 digital outputs, 2 analog inputs, support for 1762 I/O modules (up to 4).
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Motion: DC models offer 40 kHz PTO/PWM outputs and HSC inputs.
Feature Comparison Table
| Feature | MicroLogix 1000 | MicroLogix 1100 |
|---|---|---|
| Program/Data Memory | 1 KB | 4 KB each (8 KB total) |
| Data Logging | ✘ | ✔ (128 KB) |
| Recipe Storage | ✘ | ✔ (64 KB) |
| Ethernet | Optional (via ENI) | ✔ (Built-in) |
| Online Editing | ✘ | ✔ |
| LCD Display | ✘ | ✔ |
| Analog I/O | Up to 4 In / 1 Out | 2 Inputs |
| High-Speed Counter | 6.6 kHz (select models) | 40 kHz (select models) |
| PTO/PWM Outputs | ✘ | ✔ (2 channels) |
| Expansion I/O Support | ✘ | ✔ (Up to 4 modules) |
Power Supply and I/O Options
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MicroLogix 1000 supports 120/240V AC or 24V DC, with fixed I/O models ranging from 10 to 32 points.
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MicroLogix 1100 also supports 120/240V AC or 24V DC, with 16 I/O embedded and model options offering high-speed capabilities and mixed I/O types.
Model Comparison Examples
| Model | Power | Inputs | Outputs | Notes |
| 1761-L32BWA | 120/240V AC | 20 DC | 12 Relay | MicroLogix 1000 |
| 1763-L16BBB | 24V DC | 10 DC + 2 Analog | 6 FET + Relay | MicroLogix 1100 |
Memory Modules
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MicroLogix 1000: Uses 1761-HHM-K64 HHP memory module.
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MicroLogix 1100: Uses 1763-MM1, supporting RIUP and auto-recovery.
Application Suitability
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MicroLogix 1000: Ideal for cost-sensitive applications like HVAC, small material handling, basic machine control.
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MicroLogix 1100: Better suited for remote monitoring, SCADA RTUs, packaging, recipe-based processes, and Ethernet connected applications.
Summary MicroLogix 1000 provides a basic yet robust control solution for compact and fixed applications. MicroLogix 1100 builds on this foundation with Ethernet, online editing, data logging, and expandability making it a modern entry-level PLC with powerful features.
Need Help Selecting the Right Controller?
Contact our industrial automation experts at:
PLG Automation
Email: sales@plgautomation.com
Phone: 800-906-9271