Allen Bradley 1768-L43S CompactLogix GuardLogix Safety Controller

Product Overview

The Allen Bradley 1768-L43S functions as a high-performance GuardLogix controller within the CompactLogix family. This module integrates safety and standard control into a single platform, reducing hardware footprint and simplifying system architecture. It manages complex safety functions while simultaneously executing standard logic and motion commands. We provide this unit as 100% Brand New original factory stock to ensure your high-integrity safety loops meet all regulatory and performance requirements from day one.

Technical Specifications

Engineering Advantages

• Integrated Safety and Standard Control: The 1768-L43S eliminates the need for separate safety relays. It executes safety-rated logic alongside standard machine control, allowing engineers to synchronize safety and motion tasks over a single network. This integration reduces wiring complexity and accelerates commissioning.

• High Power Efficiency: Despite its processing capability, the module dissipates only 7.5 Watts of power. This low thermal footprint prevents heat buildup in high-density control cabinets, protecting nearby sensitive electronics and extending the overall lifespan of the enclosure components.

• Robust Signal Isolation: The controller provides 30V continuous isolation, shielding the internal processor from common-mode electrical noise and ground loops. This hardware-level protection ensures stable logic execution in electrically noisy industrial environments near high-power VFDs or motors.

• Versatile Hardware Expansion: The 1768-L43S supports both 1768 and 1769 I/O modules. This dual-bus architecture allows for high-speed motion modules on the 1768 side while utilizing cost-effective 1769 modules for standard discrete and analog I/O, optimizing the cost-per-point ratio.

FAQs

• Does the 1768-L43S require a safety partner module?

  Yes. To achieve SIL 3 safety ratings, you must pair the 1768-L43S with a compatible safety partner module (such as the 1768-L43S-SP). The partner module provides the redundancy required for the safety task to cross-check logic execution.

• How do I handle the high backplane current demand of 1.4 Amps?

  Ensure your 1768 power supply (such as the 1768-PA3 or 1768-PB3) provides sufficient amperage for both the controller and the safety partner. Always calculate the total current draw of all 1768/1769 modules to prevent unexpected system shutdowns or power supply overload.

• Is this controller compatible with both Series A and Series B hardware?

  The 1768-L43S supports both Series A and B. However, always verify that your firmware version in RSLogix 5000/Studio 5000 matches the hardware revision to ensure full access to all diagnostic and safety features.

• What is the condition of this specific unit?

  This unit is 100% Brand New original stock. It arrives in its original, factory-sealed Allen Bradley packaging with the UPC 612598672189 intact. We do not provide refurbished or used surplus.