Introduction

The Allen-Bradley 1768-L43S Compact GuardLogix Security Processor combines high-performance automation with integrated safety control. Its compact footprint, EtherNet/IP connectivity, and SIL3 safety certification make it ideal for applications requiring secure, reliable, and real-time industrial automation. It ensures both personnel safety and operational continuity in complex industrial processes.

Technical Specifications

Feature	Specification
Model Number	1768-L43S
Module Type	Compact GuardLogix Security Processor
Dimensions (L x W x H)	131.6 × 90 × 121.8 mm
Weight	0.45 kg (0.99 lb)
Operating Temperature	0°C to 60°C
Communication Ports	EtherNet/IP
Safety Certification	SIL3
Memory	Non-volatile program storage
I/O Expansion	Local and remote I/O modules
Mounting	DIN rail or panel mounting
Indicators	CPU, I/O, safety, network LEDs

Applications

The Allen-Bradley 1768-L43S Compact GuardLogix Security Processor is engineered for applications requiring integrated safety and control in industrial automation. Typical uses include:

Safety-critical machine and process control
Integration with CompactLogix systems for secure automation
Supervisory control with GuardLogix safety functionality
Industrial environments requiring SIL3-compliant safety measures

This processor provides reliable performance while ensuring personnel and machine safety in demanding industrial environments.

Advantages

Integrated Safety and Control: Combines standard automation logic with safety logic in a single processor.
High Reliability: Certified for SIL3 safety applications and industrial-grade operations.
Flexible Communication: Supports EtherNet/IP for networked control and diagnostics.
Compact Design: Fits easily into standard CompactLogix racks or panels.
Real-Time Diagnostics: Monitors both safety and standard system parameters for proactive management.

Technical FAQs

Which programming software is required?
Studio 5000 Logix Designer with GuardLogix Safety add-on is used for programming.
What safety certification does it have?
It is certified for SIL3 (Safety Integrity Level 3) applications.
Does it support EtherNet/IP communication?
Yes, it includes EtherNet/IP for networked data and diagnostics.
Can it handle standard and safety I/O simultaneously?
Yes, it supports integrated safety and standard I/O in the same system.
What is the operating temperature range?
0°C to 60°C (32°F to 140°F).
Does it include onboard memory?
Yes, it has non-volatile memory for safety and control programs.
Can it be used in machine safety applications?
Yes, it is specifically designed for machine and process safety applications.
Does it provide diagnostic indicators?
Yes, LEDs indicate CPU status, safety and standard I/O activity, and communication status.
Is it compatible with other CompactLogix modules?
Yes, it integrates seamlessly with 1768-series modules.
Can it be deployed in high-availability safety systems?
Yes, it supports redundant network architectures and critical safety systems.