The Allen-Bradley 1756-L55 is a ControlLogix Processor in the Allen-Bradley ControlLogix family, commonly used for industrial automation and control systems. It is part of the 1756 series of controllers and is designed for applications requiring high performance, flexibility, and scalability.

Overview

• Type: ControlLogix Processor
• Product Series: 1756
• Model: 1756-L55
• Function: It provides the central processing unit (CPU) for a ControlLogix system, performing tasks such as processing program logic, managing I/O data, and communication with other system components.
• Compatibility: The 1756-L55 is compatible with a wide range of I/O modules, network interfaces, and other ControlLogix components.

Specifications

• Processor Type: 32-bit RISC (Reduced Instruction Set Computing) Processor
• Processor Speed: 1 GHz (approx.)
• Memory:
  • User Program Memory: 4 MB (expandable up to 8 MB)
  • Data Memory: 1 MB
• I/O Support: Supports up to 10,000 I/O points in a single chassis.
• Communication Ports:
  • Ethernet/IP (for network communication)
  • RS-232 serial communication port (for programming and diagnostics)
• Redundancy: Can be configured for processor redundancy in critical applications, ensuring high availability.
• Battery Backup: Includes a battery-backed memory to retain the program and data during power loss.
• Performance:
  • Capable of performing up to 10,000 instruction execution per second (depending on the complexity of the logic).
  • Supports a high-speed scan rate for real-time applications.
• Chassis Compatibility: Compatible with 1756 series racks, supports up to 10 I/O modules in a single chassis.
• Expansion: Supports adding expansion I/O modules and communication modules for scalability.
• Diagnostics: Built-in diagnostics for system health, communication status, and other monitoring capabilities.