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- 1756-L73S
- ControlLogix ControlNet Communication Module
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- 127 × 178 × 102 mm
- 0.37kg
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Technical Profile Report – 1756-L73S Controller Module
1. Product Overview
The 1756-L73S is a high-performance GuardLogix safety programmable automation controller (PAC) designed for industrial automation systems that require both standard control and integrated safety functions. It belongs to the ControlLogix 5570 platform, which is widely used in complex manufacturing and process industries.
This model integrates:
- Standard control CPU
- Safety processing CPU
- Single chassis-based modular architecture
It is designed for applications requiring SIL 3 / PLe functional safety compliance, making it suitable for high-risk industrial systems where safety and automation must operate together.
2. Product Introduction
The 1756-L73S operates as a dual-purpose controller that handles both standard automation logic and safety-related logic within a unified architecture. It communicates with a dedicated safety partner module to ensure redundancy and compliance with safety standards.
Key characteristics include:
- 8 MB user memory
- 4 MB safety memory
- USB programming interface
- Modular ControlLogix chassis design
- Multi-network communication support
- Integrated motion control capability (system dependent)
It is engineered for stable operation in continuous industrial environments requiring high reliability and safety certification.
3. Technical Parameters
Core Specifications Table
| Parameter | Value |
|---|---|
| Controller Type | GuardLogix Safety PAC |
| Platform Series | ControlLogix 5570 |
| Processor Family | Logix 5573 |
| User Memory | 8 MB |
| Safety Memory | 4 MB |
| I/O Memory | 0.98 MB |
| Maximum Digital I/O | 128,000 points |
| Maximum Analog I/O | 4,000 channels |
| Controller Connections | Up to 500 |
| Task Capacity | 32 tasks |
| Programs per Task | 100 programs |
| Programming Interface | USB 2.0 |
| Communication Networks | EtherNet/IP, ControlNet, DeviceNet |
| Motion Axis Support | Up to 100 axes |
| Power Consumption | ~2.5 W |
| Backplane Current (5.1V DC) | 800 mA |
| Backplane Current (1.2V DC) | 5 mA |
| Thermal Dissipation | 8.5 BTU/hr |
| Isolation Voltage | 30 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 |
| Scan Type | Deterministic real-time execution |
| Dimensions (H×L×W) | ≈ 127 × 178 × 102 mm |
| Weight | ≈ 0.26 kg – 0.37 kg (typical ~0.26 kg) |
4. Product Application Areas
The 1756-L73S is widely used in industrial systems where automation and safety functions must be tightly integrated.
Industrial Applications
- Industrial robotics systems
- Automotive production lines
- Oil and gas processing facilities
- Petrochemical plants
- Power generation systems
- Heavy machinery automation
Safety-Critical Applications
- Emergency stop systems (E-stop)
- Machine safety interlocks
- Safety guarding systems
- Burner management systems
- High-risk motion control systems
5. Product Advantages
1. Integrated Safety Architecture
Combines standard control and safety control into a single controller system, reducing hardware complexity.
2. High Safety Certification
Supports SIL 3 / PLe safety requirements, suitable for regulated industrial environments.
3. Dual Memory Design
Separate standard and safety memory improves reliability and system integrity.
4. Deterministic Control Performance
Ensures predictable scan execution for both safety and standard tasks.
5. Modular System Expansion
Works within ControlLogix chassis for flexible system scaling.
6. Multi-Network Communication
Supports EtherNet/IP, ControlNet, and DeviceNet integration.
7. Industrial Reliability
Designed for continuous operation in harsh environments.
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 control architectures
It is widely used in manufacturing, energy, and process industries.
7. Product Series
Series Name: ControlLogix 5570 GuardLogix Series
The 1756-L73S is part of the GuardLogix safety controller family within the ControlLogix 5570 platform.
Series Features
- Integrated safety + standard control CPU
- Rack-based modular architecture
- Hot-swappable modules
- Distributed control capability
- High system scalability
8. Recommended Models – Same Series or Related
A. Same Series / Closely Related Models
| Model | Description | Key Parameters |
|---|---|---|
| 1756-L61S | Entry safety controller | 2 MB memory, small systems |
| 1756-L62S | Mid safety controller | 4 MB memory, balanced systems |
| 1756-L71S | Compact safety CPU | 2 MB memory, SIL 3 capable |
| 1756-L73S | High-capacity safety CPU | 8 MB memory, 4 MB safety |
| 1756-L75S | Higher-end safety CPU | Expanded memory, large systems |
B. Same Brand – Popular Models
| Model | Type | Key Parameters |
|---|---|---|
| 1756-L73S | GuardLogix CPU | 8 MB memory, SIL 3 safety |
| 1756-L72 | Standard CPU | 4 MB memory, non-safety |
| 1756-L71 | Mid CPU | 2 MB memory, stable control |
| 1756-L81E | Ethernet controller | Multi-core CPU, integrated networking |
| 1756-L85E | Advanced controller | High-speed processing, large memory |
9. Summary
The 1756-L73S controller is a high-capacity safety-integrated automation CPU designed for industrial environments requiring both performance and functional safety. With its 8 MB user memory, 4 MB safety memory, and SIL 3 certification, it is widely used in complex and safety-critical automation systems.
It represents one of the most balanced solutions in the GuardLogix L7 safety controller range, combining scalability, reliability, and safety compliance.