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- ControlLogix ControlNet Communication Module
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- 145 × 136 × 105 mm
- 0.43kg
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Technical Profile Report – 1756-L81ES Controller Module
1. Product Overview
The 1756-L81ES is a GuardLogix 5580 safety programmable automation controller (PAC) designed for high-performance industrial automation systems requiring integrated safety control, high-speed Ethernet communication, and scalable system architecture.
It belongs to the ControlLogix 5580 GuardLogix safety platform, which is used in advanced manufacturing and process industries where both standard control and functional safety (SIL systems) are required.
This controller is typically applied in systems that demand:
- Integrated safety + standard control
- High-speed industrial Ethernet communication
- Large distributed I/O systems
- Complex automation logic execution
2. Product Introduction
The 1756-L81ES operates as a dual-function safety controller, combining standard control tasks and safety logic execution within a single module. It is designed to support redundant safety architectures and high-speed deterministic control.
Key characteristics include:
- 3 MB standard user memory
- 1.5 MB safety memory
- Integrated 1 Gbps Ethernet port
- USB 2.0 programming interface
- 4-character diagnostic display
- Support for up to 100 EtherNet/IP devices
It is widely used in systems where safety compliance and high-speed control must coexist.
3. Technical Parameters
Core Specifications Table
| Parameter | Value |
|---|---|
| Controller Type | GuardLogix Safety PAC |
| Platform Series | ControlLogix 5580 |
| Processor Family | Logix 5581 |
| Standard Memory | 3 MB |
| Safety Memory | 1.5 MB |
| Maximum Digital I/O | 128,000 points |
| Maximum Analog I/O | 4,000 channels |
| Controller Connections | Up to 100 EtherNet/IP devices |
| Task Capacity | 32 tasks |
| Programs per Task | Up to 1000 programs |
| Programming Interface | USB 2.0 |
| Communication Networks | EtherNet/IP (10/100/1000 Mbps) |
| Ethernet Nodes | Up to 100 |
| Display | 4-character alpha-numeric display |
| Power Consumption | ~6.2 W |
| Backplane Current (5.1V DC) | 1.2 A |
| Backplane Current (1.2V DC) | 5 mA |
| Thermal Dissipation | ~21 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 |
| Safety Level | SIL 3 / PLe capable |
| Scan Type | Deterministic real-time execution |
| Dimensions (H×L×W) | ≈ 145 × 136 × 105 mm |
| Weight | ≈ 0.43 kg |
4. Product Application Areas
The 1756-L81ES is widely used in industrial environments requiring integrated safety and high-speed automation.
Industrial Applications
- Automotive manufacturing safety systems
- Robotics safety control systems
- Oil and gas emergency shutdown systems
- Chemical plant safety interlocks
- Power generation protection systems
- Heavy machinery safety automation
Safety Functions
- Emergency stop (E-stop) systems
- Safety gate monitoring
- Light curtain protection systems
- Burner management safety systems
- Motion safety supervision
5. Product Advantages
1. Integrated Safety Architecture
Combines standard control and safety control in one controller module.
2. High-Speed Ethernet Communication
Supports Gigabit Ethernet for fast industrial data exchange.
3. SIL 3 Functional Safety Capability
Suitable for high-risk industrial applications requiring certified safety systems.
4. Compact High-Performance Design
Integrates processing, safety, and communication in a single controller.
5. Strong System Scalability
Supports large distributed I/O architectures up to 128,000 points.
6. Deterministic Execution
Ensures stable real-time control performance.
7. Easy Integration
Works within modular ControlLogix chassis systems.
6. Brand Positioning
The product belongs to a globally established industrial automation ecosystem known for:
- Programmable automation controllers
- Industrial safety systems
- Motion control platforms
- Large-scale distributed automation architectures
It is widely used in industries requiring high-performance safety-integrated automation systems.
7. Product Series
Series Name: ControlLogix 5580 GuardLogix Safety Series
The 1756-L81ES is part of the next-generation GuardLogix 5580 safety controller family.
Series Features
- Integrated safety + standard control
- Gigabit Ethernet communication
- Modular chassis architecture
- High-speed deterministic processing
- SIL 3 certified safety design
8. Recommended Models – Same Series or Related
A. Same Series / Closely Related Models
| Model | Description | Key Parameters |
|---|---|---|
| 1756-L81ES | Safety CPU | 3 MB + 1.5 MB safety memory |
| 1756-L80ES | Entry safety CPU | Lower memory configuration |
| 1756-L82ES | Mid safety CPU | Higher performance variant |
| 1756-L83ES | Advanced safety CPU | Large system support |
| 1756-L85ES | High-end safety CPU | Maximum processing capability |
B. Same Brand – Popular Models
| Model | Type | Key Parameters |
|---|---|---|
| 1756-L81ES | GuardLogix CPU | Safety + standard control |
| 1756-L85E | High-performance controller | Advanced processing system |
| 1756-L83E | Multi-core controller | Large automation systems |
| 1756-L73S | Safety L7 CPU | 8 MB memory, SIL 3 |
| 1756-L72 | Standard CPU | 4 MB memory, non-safety |
9. Summary
The 1756-L81ES controller is a high-performance safety-integrated industrial automation CPU designed for modern manufacturing systems. With its dual-memory safety architecture, Gigabit Ethernet communication, and SIL 3 capability, it is widely used in applications where safety and speed must operate together.
It represents a key component in modern safety-critical industrial automation systems, combining control, communication, and protection in a single platform.