CompactLogix 5371 vs 5380
CompactLogix System Overview
The Allen-Bradley CompactLogix system by Rockwell Automation is a versatile control solution combining a common programming environment, communication networks, and control engine in a compact form. It supports simple to complex motion control via Compact 5000 or 1734 I/O modules.
This guide compares the CompactLogix 5371 (5370 L1 series) and 5380 controller series to help you select the most suitable option.
CompactLogix 5371 Overview
Bulletin: 1769
Key Models: 1769-L16ER-BB1B, L18ER-BB1B, L18ERM-BB1B, L19ER-BB1B
Form Factor: Integrated I/O and power supply, DIN or panel mount
Key Features:
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Embedded I/O: 16 sinking digital inputs, 16 sourcing digital outputs
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Dual EtherNet/IP ports (DLR & Linear topologies, 10/100 Mbps)
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Integrated power supply (24V DC isolated in Series B)
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USB port for firmware/programming
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No battery required (internal energy storage)
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Integrated motion over EtherNet/IP (only ERM models)
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POINT I/O support (max 6–8 modules)
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SD card support (1GB included)
CompactLogix 5380 Overview
Bulletin: 5069
Key Models: 5069-L306ER, L310ERM, L330ERM, L380ERM, etc.
Form Factor: Modular I/O (Compact 5000), DIN rail mount
Key Features:
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Configurable dual 1Gbps EtherNet/IP ports (Linear/DLR or Dual-IP)
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USB port for programming and configuration
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SD card (2GB included; supports up to 32GB options)
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Enhanced security: role-based access, firmware verification
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Up to 32 axes of motion (ERM models)
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Support for 5069 Compact 5000 I/O (up to 31 modules)
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MOD/SA RTB power interface
Feature Comparison Table
| Feature | CompactLogix 5371 | CompactLogix 5380 |
|---|---|---|
| I/O Support | Embedded + POINT I/O | Modular Compact 5000 I/O |
| Max Local I/O Modules | 6–8 POINT modules | 31 Compact 5000 modules |
| EtherNet/IP Ports | Dual 10/100 Mbps | Dual 1 Gbps (configurable) |
| IP Mode Support | DLR/Linear | DLR/Linear & Dual-IP |
| Integrated Motion Support | Only on ERM models (1–2 axes) | ERM models (up to 32 axes) |
| Memory Range | 384 KB–1 MB | 0.6 MB–10 MB |
| Programming | RSLogix 5000 / Studio 5000 | Studio 5000 (v28–30+) |
| Security | Basic | Advanced (change detection, RBAC, firmware validation) |
Application Suitability
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CompactLogix 5371: Great for small to mid-sized systems needing onboard I/O and basic motion control.
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CompactLogix 5380: Ideal for high-performance systems requiring advanced networking, security, and motion capabilities.
Conclusion
If your system benefits from embedded I/O and a smaller form factor, the CompactLogix 5371 is a cost-effective and compact solution. However, for systems demanding robust motion control, expanded I/O, advanced EtherNet/IP modes, and security, the CompactLogix 5380 is the superior long-term choice.
Contact PLG Automation
Email: sales@plgautomation.com
Phone: 800-906-9271