1756-L73S Allen-Bradley

Original price was: $3,040.00.Current price is: $2,339.00.

1 in stock



The 1756-L73S is a GuardLogix controller manufactured by Allen-Bradley, a brand of Rockwell Automation. GuardLogix controllers are a part of the ControlLogix family and are designed to provide both standard and safety control in one package. Here are some key features and details about the 1756-L73S:

Key Features:

  1. Dual Functionality:
    • Standard Control: The 1756-L73S can perform standard control functions similar to other ControlLogix controllers.
    • Safety Control: It provides integrated safety control up to SIL 3 (Safety Integrity Level) and PLe (Performance Level e), making it suitable for applications requiring stringent safety standards.
  2. Memory:
    • The controller has 8 MB of user memory for standard logic and an additional 4 MB for safety logic, allowing for complex and large-scale control applications.
  3. Performance:
    • The 1756-L73S features a high-performance CPU capable of executing both standard and safety tasks efficiently.
    • It supports fast scan times and quick I/O response times, essential for real-time control and safety applications.
  4. Redundancy:
    • Supports controller redundancy, enhancing system availability and reliability for critical applications.
  5. Communication:
    • The controller supports various communication protocols such as EtherNet/IP, ControlNet, and DeviceNet, enabling seamless integration with other industrial devices and systems.
    • It has multiple communication ports for connectivity and data exchange.
  6. Programming and Configuration:
    • The 1756-L73S is programmed using Rockwell Software’s Studio 5000 Logix Designer, which provides a unified environment for developing both standard and safety control applications.
    • The software offers advanced features like online editing, diagnostics, and simulation to facilitate development and maintenance.
  7. Safety Features:
    • The GuardLogix controller includes built-in safety instructions and features like safety signatures and safety task monitors to ensure compliance with safety standards.
    • Supports various safety input and output modules for implementing safety functions such as emergency stop, guard monitoring, and light curtain applications.
  8. Diagnostics and Monitoring:
    • Provides extensive diagnostics and monitoring capabilities for both standard and safety applications, helping in troubleshooting and maintenance.
    • Offers features like tag-based alarming, trend analysis, and status indicators for real-time monitoring.


  • The 1756-L73S is commonly used in industries requiring high reliability and safety, such as automotive, food and beverage, pharmaceuticals, and process industries.
  • Typical applications include machine safety, process control, and integrated safety and standard control systems.

Installation and Maintenance:

  • The controller is designed to be installed in a 1756 ControlLogix chassis, which can house multiple modules for expanded capabilities.
  • Regular firmware updates and maintenance checks are recommended to ensure optimal performance and safety compliance.

In summary, the 1756-L73S GuardLogix controller is a versatile and high-performance solution for applications requiring both standard and safety control. Its integration of safety features, robust communication capabilities, and powerful programming environment make it a valuable component in modern industrial automation systems.