1768-L43 | Allen-Bradley | CompactLogix Logix5343 Central Processing Unit

Product Overview

The 1768-L43 serves as a high-performance Logix5343 controller designed for mid-range applications requiring integrated motion and expanded communication capabilities. This processor anchors the 1768 system, bridging the gap between standard CompactLogix and larger ControlLogix systems by supporting high-speed 1768 backplane modules alongside standard 1769 I/O. We provide this unit as 100% Brand New original factory stock, ensuring the highest computational integrity for your automated production lines.

Technical Specifications

Engineering Advantages

• High-Speed Motion Integration: The 1768 backplane provides a dedicated high-speed bus that supports 1768-M04SE SERCOS interface modules. This architecture enables the 1768-L43 to manage complex multi-axis motion tasks with significantly lower latency than standard 1769-based controllers.

• Dual-Bus Versatility: This CPU manages two distinct buses simultaneously. It utilizes the 1768 bus for high-bandwidth communication (EtherNet/IP or ControlNet) and motion, while the 1769 bus handles standard discrete and analog I/O. This dual-bus design optimizes data throughput and prevents communication bottlenecks.

• Expanded Connectivity: The 1768-L43 supports up to 250 Logix connections. This capacity allows the controller to interface with a vast array of HMIs, drives, and other PLC nodes across the factory floor, making it an ideal choice for data-heavy SCADA environments.

• Rugged Installation Hardware: The module features robust mounting points requiring 1.16 Nm of torque. This secure mechanical attachment ensures the processor remains stable in high-vibration environments, protecting the internal logic circuits and backplane connectors from intermittent contact failure.

FAQs

What is the primary difference between the 1768-L43 and the 1769-L3x series?

The 1768-L43 utilizes the 1768 backplane, which supports high-speed motion and communication modules like the 1768-ENBT. Standard 1769-L3x processors rely solely on the 1769 bus, which offers lower bandwidth for motion and networking compared to the 1768-L43.

How many Ethernet modules can I install with this processor?

The 1768-L43 supports a maximum of two 1768 communication modules. You can install two 1768-ENBT modules for network redundancy or to separate factory-floor I/O traffic from enterprise-level data collection.

Which power supply does the 1768-L43 require?

This processor requires a 1768-series power supply, such as the 1768-PA3 or 1768-PB3. Standard 1769 power supplies will not mate with the 1768 backplane used by this CPU.

Does this unit include the 1784-CF128 Industrial CompactFlash card?

While the 1768-L43 supports non-volatile memory storage via CompactFlash, the card typically ships as a separate accessory. We recommend installing an industrial-grade card to ensure the controller automatically reloads your user program during a power cycle.