Allen-Bradley 1756-L72S GuardLogix Safety Processor

Elevate your industrial safety systems with the 1756-L72S GuardLogix processor from Allen-Bradley. This advanced programmable automation controller delivers robust safety performance with 4MB user memory and dedicated safety features for SIL 3/Cat. 4/PLe applications.

Product Overview

• Brand: Allen-Bradley / Rockwell Automation
• Series: GuardLogix 5570
• Model: 1756-L72S Programmable Automation Controller
• Safety Rating: SIL 3, Category 4, PLe
• Controller Type: Dual-processor safety solution
• Weight: 0.55 lbs (0.25 kg)

Technical Specifications

• User Memory: 4 MB standard memory capacity
• Safety Memory: 2 MB dedicated safety memory
• I/O Memory: 0.98 MB for input/output processing
• Non-Volatile Memory: 1 GB SD card (1784-SD1) included
• Maximum I/O Capacity: 128,000 points total
• Digital I/O: 128,000 maximum points
• Analog I/O: 4,000 maximum points
• Current Consumption: 5mA @ 1.2V DC, 800mA @ 5.1V DC
• Power Dissipation: 2.5 Watts maximum
• Thermal Dissipation: 8.5 BTU/hour
• Isolation Voltage: 30V continuous operation
• Communication Port: 1 x Built-in USB port
• Controller Connections: Supports up to 500 connections
• Standard Tasks: 31 programmable tasks
• Safety Tasks: 1 dedicated safety task

Safety & Performance Features

• Dual-Processor Design: Requires 1756-L7SP safety partner module
• Integrated Safety: Standard and safety projects in single file
• Energy Storage Modules: Environmentally friendly battery alternative
• Network Support: ControlNet, DeviceNet, EtherNet/IP safety communication
• Front Display: Real-time diagnostic information

Installation & Compatibility

• Install in any ControlLogix chassis slot (4-slot to 17-slot)
• Compatible with standard and conformally-coated chassis
• Works with 1756-PAxx and 1756-PBxx power supplies
• Multiple controllers can operate in same chassis
• No traditional lithium batteries required

Energy Storage Options

• 1756-ESMCAP: Integrated capacitor module
• 1756-ESMNSE: Removable backup with no residual time
• 1756-ESMNRM: Non-removable module for secure applications

Download the complete technical manual for detailed installation and programming instructions: Download 1756-L72S Technical Guide

Packaging & Shipping

• Package Contents: 1 x 1756-L72S Controller with 1GB SD Card
• Shipping Methods: FedEx, UPS, DHL express shipping available
• Warranty: 12-month performance guarantee

Frequently Asked Questions

• What safety partner module do I need?
  You must use the 1756-L7SP or 1756-L7SPK safety partner module.
• Can I expand the non-volatile memory?
  Yes, the SD card can be upgraded to 2GB using the 1784-SD2 card.
• How many I/O points can this controller handle?
  It supports up to 128,000 digital and 4,000 analog I/O points.
• What networks support safety communication?
  Safety protocols work over EtherNet/IP, DeviceNet, and ControlNet.
• Does this controller use traditional batteries?
  No, it uses modern energy storage modules instead of lithium batteries.

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