The Allen-Bradley 1756-L73S, also cataloged as the 1756-L73S GuardLogix Processor Module, operates as a dedicated hardware component for executing standard and safety application logic within GuardLogix 5570 controller platforms.

Model Identification & Hardware Scope

The 1756-L73S is a GuardLogix Logix5573S processor designed for integrated standard and safety control execution. The controller combines application processing capability with dedicated safety memory resources for GuardLogix-based automation architectures.

Hardware Specifications

ControlLogix Architecture Compatibility

The 1756-L73S processor communicates with ControlLogix chassis components through the backplane bus architecture. The controller supports coordinated execution of application tasks, I/O processing, and safety-related routines within GuardLogix systems.

The GuardLogix platform uses I/O density scaling and deterministic controller communication methods to manage distributed automation applications. Firmware flash compatibility and controller revision alignment must be confirmed before deployment into an existing Logix system.

Safety Control Execution Features

The 1756-L73S integrates GuardLogix safety processing functions with dedicated safety memory allocation. The processor supports safety application execution where controller diagnostics, safety task management, and standard logic processing are coordinated within the GuardLogix environment.

Safety-related projects require compatible safety I/O modules, approved firmware revisions, and configured safety signatures according to the GuardLogix system design requirements.

Ordering Information

• 1 x Allen-Bradley 1756-L73S GuardLogix Logix5573S Processor Module
• 1 x Factory-installed 1 GB non-volatile memory storage
• 1 x Product identification label
• 1 x Technical installation documentation package

Field Installation Guidelines

Controller Mounting

• Install the processor module in a compatible ControlLogix chassis slot.
• Remove chassis power before module insertion or removal unless the system design supports approved maintenance procedures.
• Verify slot addressing and controller configuration before commissioning.

Electrical Connection

• Confirm backplane power supply capacity before installing additional modules.
• Maintain proper grounding practices for the controller chassis.
• Separate communication wiring from high-voltage power conductors to reduce electrical interference.

Configuration Maintenance

• Verify firmware revision compatibility between processor, communication modules, and I/O devices.
• Maintain project backups before firmware updates or controller replacement.
• Check controller diagnostics for status faults after installation.

Frequently Asked Questions

• What type of controller is the 1756-L73S?

  The 1756-L73S is a GuardLogix Logix5573S processor module designed for standard and safety application execution.

• How much safety memory is available in this processor?

  The processor provides 4 MB of safety memory for safety application data and program execution.

• What is the non-volatile memory capacity?

  The controller ships with 1 GB of non-volatile memory storage for project and application data management.

• How many I/O points can the controller support?

  The 1756-L73S supports a maximum of 128000 I/O points within a configured GuardLogix system architecture.

• What is the backplane current requirement?

  The module requires 800 mA at 5.1 VDC and 5 mA at 1.2 VDC according to the listed specifications.

• Can the processor be installed in any ControlLogix chassis?

  Installation requires a compatible GuardLogix/ControlLogix chassis and matching system firmware configuration.

• Does the processor support firmware updates?

  Firmware flash compatibility depends on the controller revision and the installed Logix system software environment.

• What installation precautions are required for this module?

  Verify chassis power conditions, grounding, firmware compatibility, and project configuration before commissioning.