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- 127 × 178 × 102 mm
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Technical Profile Report – 1756-L7SP Safety Partner Module
1. Product Overview
The 1756-L7SP is a GuardLogix Safety Partner controller module, designed to work together with primary ControlLogix safety CPUs (such as L71S, L72S, L73S). It does not operate independently; instead, it forms part of a redundant safety architecture (1oo2 system) used in high-integrity industrial safety applications.
This module belongs to the ControlLogix GuardLogix safety system, where it ensures that safety logic is executed with redundancy and cross-verification to meet strict functional safety requirements.
It is widely used in systems requiring:
- SIL 3 / PLe safety performance
- Redundant safety processing
- Machine and process safety validation
- High-risk industrial automation
2. Product Introduction
The 1756-L7SP acts as a safety partner processor, installed physically next to a primary GuardLogix controller. It continuously compares and validates safety data to ensure correct execution of safety functions.
Key characteristics include:
- Safety partner for L7S series controllers
- Required for GuardLogix SIL 3 architecture
- Dual-slot module width design
- Real-time safety data synchronization
- High-integrity fault detection system
- Chassis-based installation
It ensures that safety logic is executed reliably and redundantly in industrial systems where failure is not acceptable.
3. Technical Parameters
Core Specifications Table
| Parameter | Value |
|---|---|
| Controller Type | Safety Partner Module |
| Platform Series | GuardLogix / ControlLogix 5570 |
| Functional Role | Redundant safety processor |
| Memory | Dependent on paired primary controller |
| Safety Architecture | 1oo2 redundant system |
| Safety Level | SIL 3 / PLe capable |
| Module Width | 2-slot module |
| Communication | Backplane-based synchronization |
| Programming Interface | USB (system-level access) |
| Compatible Controllers | 1756-L71S / L72S / L73S series |
| Chassis Compatibility | 1756-A4, A7, A10, A13, A17 series |
| Power Consumption | ~2.5 W |
| Backplane Current (5.1V DC) | 800 mA |
| Backplane Current (24V DC) | 5 mA |
| Isolation Voltage | 30 V continuous |
| Thermal Dissipation | 8.5 BTU/hr |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5% – 95% non-condensing |
| Scan Type | Safety redundant real-time execution |
| Dimensions (H×L×W) | ≈ 127 × 178 × 102 mm |
| Weight | ≈ 0.26 kg |
4. Product Application Areas
The 1756-L7SP is used in combination with safety controllers in systems where safety integrity is critical.
Industrial Applications
- Industrial robotics safety systems
- Automotive production safety lines
- Oil and gas safety shutdown systems
- Chemical plant emergency protection systems
- High-risk machinery automation
- Power plant safety interlock systems
Safety Functions
- Emergency stop validation (E-Stop systems)
- Safety gate monitoring
- Light curtain and barrier protection
- Burner management safety systems
- Motion safety monitoring
5. Product Advantages
1. High Safety Integrity
Supports SIL 3 / PLe functional safety in redundant architecture systems.
2. Redundant Processing Design
Works as a paired safety processor to eliminate single-point failures.
3. Tight Synchronization with Primary CPU
Continuously compares safety data with primary controller for validation.
4. Modular System Integration
Fits directly into ControlLogix chassis next to primary controller.
5. High Reliability in Critical Systems
Designed for continuous safety operation in mission-critical environments.
6. Fault Detection Capability
Detects discrepancies between redundant safety channels in real time.
7. Industrial Safety Compliance
Meets international functional safety standards for machinery systems.
6. Brand Positioning
The product belongs to a globally established industrial automation ecosystem known for:
- Safety programmable controllers
- Industrial control systems
- Redundant automation architectures
- High-integrity safety platforms
It is widely used in industries where human safety and machine protection are critical requirements.
7. Product Series
Series Name: GuardLogix Safety Partner Series (ControlLogix 5570 Safety System)
The 1756-L7SP is part of the GuardLogix safety architecture, functioning only alongside compatible L7S safety CPUs.
Series Features
- Redundant safety processing architecture
- 1oo2 safety system design
- Chassis-based modular installation
- High-integrity real-time validation
- SIL 3 certified system design
8. Recommended Models – Same Series or Related
A. Same Series / Closely Related Models
| Model | Description | Key Parameters |
|---|---|---|
| 1756-L71S | Entry safety CPU | Primary controller for L7SP |
| 1756-L72S | Mid safety CPU | Balanced safety performance |
| 1756-L73S | High safety CPU | Large memory safety system |
| 1756-L7SP | Safety partner module | Redundant safety processor |
| 1756-L75S | High-end safety CPU | Expanded safety memory |
B. Same Brand – Popular Models
| Model | Type | Key Parameters |
|---|---|---|
| 1756-L7SP | Safety Partner Module | Redundant processor, SIL 3 |
| 1756-L73S | Safety CPU | 8 MB memory, GuardLogix |
| 1756-L72 | Standard CPU | 4 MB memory, non-safety |
| 1756-L81E | Ethernet controller | Multi-core CPU, networking |
| 1756-L85E | Advanced controller | High-speed processing system |
9. Summary
The 1756-L7SP safety partner module is a critical component in GuardLogix safety systems, designed to provide redundant processing and ensure SIL 3 functional safety compliance. It does not function independently but plays a vital role in verifying and validating safety logic executed by the primary controller.
Its value lies in system-level safety integrity, redundancy, and fault detection, making it essential for high-risk industrial automation environments.