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- Allen Bradley
- 1756-L81E
- ControlLogix ControlNet Communication Module
- USA
- 145 × 136 × 105 mm
- 0.43kg
- Xiamen, China
- New & In Stock
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Technical Profile Report – 1756-L81E Controller Module
1. Product Overview
The 1756-L81E is a next-generation ControlLogix 5580 programmable automation controller (PAC) designed for high-performance industrial automation systems. It is widely used in modern factory automation environments that require fast processing speed, integrated Ethernet communication, and large-scale distributed control capability.
This controller belongs to the ControlLogix 5580 platform, which is an upgraded generation compared to the traditional 5570 series. It integrates enhanced processing architecture and improved communication performance.
It is commonly used in systems requiring:
- High-speed real-time control
- Large I/O distributed architectures
- Industrial Ethernet-based networking
- Complex automation logic execution
2. Product Introduction
The 1756-L81E functions as the main processing unit in a ControlLogix chassis system. It executes control programs, manages I/O modules, and handles high-speed industrial communication.
Key characteristics include:
- 3 MB user memory
- Integrated Ethernet port (1 Gbps capability)
- USB programming interface
- Modular rack-based architecture
- High-speed deterministic execution
- Support for up to 128,000 I/O points
It is designed for modern industrial environments requiring fast networking and flexible system expansion.
3. Technical Parameters
Core Specifications Table
| Parameter | Value |
|---|---|
| Controller Type | Programmable Automation Controller (PAC) |
| Platform Series | ControlLogix 5580 |
| Processor Family | Logix 5581 |
| User Memory | 3 MB |
| I/O Memory | N/A |
| Maximum Digital I/O | 128,000 points |
| Maximum Analog I/O | 4,000 channels |
| Controller Connections | High-capacity multi-device network |
| Task Capacity | 32 tasks |
| Programs per Task | 100 programs |
| Programming Interface | USB 2.0 |
| Communication Networks | EtherNet/IP, Ethernet (10/100/1000 Mbps) |
| Motion Control Support | System dependent |
| Power Consumption | ~6.2 W |
| Backplane Current (5.1V DC) | ~1.2 mA |
| Backplane Current (1.2V DC) | ~5 mA |
| Thermal Dissipation | 21.2 BTU/hr |
| Isolation Voltage | 50 V continuous |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5% – 95% non-condensing |
| Scan Type | High-speed deterministic execution |
| Dimensions (H×L×W) | ≈ 145 × 136 × 105 mm |
| Weight | ≈ 0.43 kg (approx. 0.94 lbs) |
4. Product Application Areas
The 1756-L81E is widely used in modern industrial automation systems that require high-speed networking and distributed control.
Industrial Applications
- Automotive production systems
- Semiconductor manufacturing lines
- Oil and gas control systems
- Power generation and smart grid systems
- Logistics and conveyor automation
- Large-scale packaging systems
Process Control Applications
- Continuous production systems
- Chemical processing plants
- Pump and compressor control
- Multi-loop regulatory systems
- Energy monitoring and distribution
5. Product Advantages
1. High-Speed Ethernet Integration
Supports Gigabit Ethernet communication, enabling fast data exchange across industrial networks.
2. Modern Control Architecture
Part of the 5580 platform with improved processing efficiency compared to older L7 series.
3. Compact High-Performance Design
Combines processing capability and communication in a single controller module.
4. Large I/O Handling Capability
Supports up to 128,000 digital I/O points for large-scale automation systems.
5. Strong System Integration
Easily integrates into distributed control architectures with EtherNet/IP.
6. Stable Real-Time Execution
Ensures deterministic control performance for industrial processes.
7. Flexible Expansion
Works within modular ControlLogix chassis for scalable system design.
6. Brand Positioning
The product belongs to a globally recognized industrial automation ecosystem known for:
- Programmable automation controllers
- Industrial Ethernet networking systems
- Motion control solutions
- Large-scale distributed automation platforms
It is widely used in industries requiring high-speed digital communication and modern industrial networking.
7. Product Series
Series Name: ControlLogix 5580 Series
The 1756-L81E belongs to the ControlLogix 5580 next-generation controller family, designed to replace older L7 platforms.
Series Features
- Gigabit Ethernet integration
- Improved processor architecture
- Modular rack-based system design
- High-speed industrial communication
- Scalable automation control
8. Recommended Models – Same Series or Related
A. Same Series / Closely Related Models
| Model | Description | Key Parameters |
|---|---|---|
| 1756-L80E | Entry 5580 CPU | Lower memory, basic control |
| 1756-L81E | Standard 5580 CPU | 3 MB memory, Ethernet integrated |
| 1756-L82E | Mid 5580 CPU | Higher memory, faster processing |
| 1756-L83E | Advanced CPU | Large-scale automation support |
| 1756-L85E | High-end CPU | Maximum performance configuration |
B. Same Brand – Popular Models
| Model | Type | Key Parameters |
|---|---|---|
| 1756-L81E | ControlLogix CPU | 3 MB memory, Gigabit Ethernet |
| 1756-L85E | Advanced controller | High-speed processing, large memory |
| 1756-L83E | High-performance CPU | Multi-core architecture |
| 1756-L73 | L7 CPU | 8 MB memory, legacy system |
| 1756-L72 | Mid CPU | 4 MB memory, stable control |
9. Summary
The 1756-L81E controller is a modern high-performance industrial automation CPU designed for Ethernet-centric control systems. With its Gigabit Ethernet capability, fast processing architecture, and modular system design, it is widely used in advanced manufacturing and process industries.
It represents a transition toward network-driven industrial automation architectures, combining speed, flexibility, and scalability.