Allen-Bradley 1768-L45S: High-Performance Safety Controller

The Allen-Bradley 1768-L45S delivers advanced safety automation with SIL 3 and PL e certification. This CompactGuardLogix controller from Rockwell Automation integrates standard and safety control in one robust platform. It features 4 MB total memory and supports extensive I/O expansion for complex applications. Access complete technical specifications and safety programming guidelines in our detailed manual.

Download Complete Technical Manual (PDF)

Safety & Certification Specifications

• Brand & Series: Allen-Bradley CompactGuardLogix Safety
• Model Number: 1768-L45S Safety Controller
• Safety Rating: SIL 3 (Safety Integrity Level 3) certified
• Performance Level: PL e (Performance Level e) compliant
• Safety Architecture: 1oo2 (one-out-of-two) redundant design
• Isolation Rating: 30V DC continuous with functional insulation

Memory & Processing Capabilities

• Standard Memory: 3 MB for conventional control tasks
• Safety Memory: 1 MB dedicated to safety functions
• Memory Card: 1784-CF128 CompactFlash card support
• Programming Standard: IEC-61131-3 compliant languages
• Safety Programming: Relay ladder logic with safety instructions

Expansion & I/O Configuration

• Local I/O Capacity: 4 modules of 1768 local I/O
• Expansion I/O Capacity: 30 modules of 1769 Compact I/O
• Expansion Banks: 3 separate I/O banks maximum
• Communication Modules: 2 modules for network connectivity
• Network Support: Ethernet/IP, ControlNet, DeviceNet options

Electrical & Environmental Ratings

• Backplane Current: 2.1A at 24V DC power requirement
• Power Consumption: 50.4 Watts maximum operational load
• Heat Dissipation: 9.5 Watts thermal management
• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Vibration Resistance: 5G at 10-500 Hz operating range

Physical & Installation Specifications

• Dimensions: 131.6 x 90 x 121.8 mm compact design
• Weight: 0.45 kg (15.9 ounces) lightweight construction
• Mounting Options: DIN rail or panel mounting flexibility
• Clearance Requirements: 105mm top/bottom, 90mm sides
• Enclosure Type: Open-style for controlled environments
• Communication Port: Embedded RS-232 interface

Packaging & Delivery Information

• Genuine Allen-Bradley 1768-L45S safety controller
• Complete installation and programming documentation
• International shipping via FedEx, UPS, and DHL available
• Secure packaging with protective materials included
• Package dimensions: 8 x 8 x 5 inches standard size

Warranty & Support Services

• Comprehensive 12-month product warranty coverage
• Expert technical support for safety applications
• Professional installation guidance and assistance
• Replacement service for qualified warranty claims

Professional Technical FAQs

• What communication modules work with this safety controller?
• The controller supports Ethernet/IP, ControlNet, and DeviceNet safety modules.
• Can I use standard programming languages for safety tasks?
• Safety tasks require relay ladder logic with specific safety instructions only.
• What is the maximum number of I/O modules supported?
• The system handles 4 local and 30 expansion I/O modules across 3 banks.
• Does this controller require special mounting considerations?
• Yes, maintain 105mm top/bottom and 90mm side clearances for ventilation.
• What memory card type does the controller use?
• It utilizes the 1784-CF128 CompactFlash card for additional memory storage.

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