1756-L73 | AB Allen Bradley | ControlLogix 8 MB Controller Module

Product Summary

The 1756-L73 is a ControlLogix 5570 controller. It provides high-performance processing with 8 MB user memory for medium to large control applications in the ControlLogix platform.

Core Specifications

• Catalog Number: 1756-L73
• Controller Type: ControlLogix 5570 Controller
• User Memory: 8 MB
• I/O Capacity: Up to 128,000 digital I/O points (system dependent)
• Communication Ports: 1 RS-232 serial port; Ethernet via separate communication module
• Chassis Slot: Occupies one slot in 1756 chassis

Electrical & Performance Characteristics

• Programming Languages: Ladder Diagram, Structured Text, Function Block Diagram, Sequential Function Chart
• Scan Time: Fast execution for complex logic and motion
• Backplane Current: Approximately 1.2 A @ 5 VDC (typical)
• Operating Temperature: 0°C to 60°C (32°F to 140°F)

Installation Guide

1. Install the controller in any slot of a 1756 ControlLogix chassis.
2. Connect power and communication cables as required.
3. Configure the controller using Studio 5000 Logix Designer.
4. Download the project and verify operation through controller diagnostics.

Selection Guidelines

• Select 1756-L73 for applications requiring 8 MB user memory and high-performance Logix processing.
• For higher memory or integrated motion/Ethernet, consider L7x or L8x series controllers.
• Ensure chassis power supply capacity supports the controller’s backplane current draw.

Frequently Asked Questions