1747-L542 | Allen-Bradley SLC 5/04 CPU Processor Unit | SLC 500

Product Overview

The Allen-Bradley 1747-L542 represents the high-performance tier of the SLC 500 family, specifically the SLC 5/04 controller. This processor manages complex automation tasks by providing a massive 32K word memory capacity and a rapid execution speed of 0.9 ms/K scan time. It excels in high-speed communication via its built-in Data Highway Plus (DH+) port, allowing seamless integration into existing plant-wide networks. We offer this unit as 100% Brand New, ensuring the internal lithium battery and memory circuits possess their full factory lifespan for your critical machine control applications.

Technical Specifications

The 1747-L542 provides the computational power necessary for large-scale I/O configurations:

Engineering Advantages

• High-Speed Network Integration: The integrated DH+ port facilitates high-speed peer-to-peer communication and data acquisition. This enables the 1747-L542 to exchange data with other SLC 5/04 or PLC-5 processors significantly faster than standard DH-485 modules.

• Expanded I/O Handling: This processor controls up to 4,096 discrete I/O points across a maximum of 30 local slots. This high density allows engineers to consolidate multiple small controllers into a single, powerful 1747-L542 unit, simplifying program management.

• Complex Instruction Execution: With 107 built-in instructions, the SLC 5/04 handles advanced floating-point math, PID loops, and indirect addressing. This computational depth supports sophisticated process control that basic micro-controllers cannot execute.

• Industrial Durability: Engineered to withstand 30 G of operating shock and relative humidity up to 95%, this processor maintains stable operation in heavy-vibration environments such as stamping presses or high-speed packaging lines.

FAQs

• Q: Can the 1747-L542 replace a 1747-L541 processor?

• A: Yes. The 1747-L542 offers 32K words of memory, which exceeds the 16K words found in the 1747-L541. Your existing program will run on the L542 without modifications, provided you update the processor type in your RSLogix 500 project configuration.

• Q: Does the module include a backup battery for memory retention?

• A: Yes. As a 100% Brand New unit, it includes a factory-installed lithium battery (typically 1747-BA). We recommend verifying the battery status LED upon initial power-up to ensure non-volatile memory protection.

• Q: What software do I need to program this SLC 5/04 unit?

• A: You require RSLogix 500 software. For communication, you can use the DH+ port with a 1784-U2DHP converter or the RS-232 port with a standard null-modem cable.

• Q: Is there a risk of memory loss if I store this unit for a long period?

• A: Because we sell Brand New units, the internal components remain in peak condition. However, for long-term storage, we recommend checking the battery every 2 years to prevent data loss in the RAM once the unit is programmed.