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Allen Bradley | SLC-500 | 1747-L543 | Image

Allen Bradley | SLC-500 | 1747-L543 | Image

Includes a PDF Electric and Supply warranty.
PDF Electric and Supply is not an authorized distributor for Allen Bradley

(Never Used)


1 In Stock

1 Yr PDF Supply warranty

What is Surplus?



8 In Stock

1 Yr PDF Supply warranty

What is Refurbished?

Repair Service


5-10 Days

1 Yr PDF Supply warranty


Other Available Revisions for the 1747-L543 1747-L543/A1747-L543/B1747-L543/C

Common misspellings:
  • l747-L543
  • 17A7-L543
  • 1747-1543
  • 1747-L5A3
  • 1747L543


The Allen-Bradley 1747-L543 is one of the powerful processors from the SLC 500 product family. The 1747-L543 processor is flexible, offering a wide range of I/O channels, memory, ports, and instruction sets. This facilitates meeting the exact needs of a given application. Being among the family of SLC 5/04 processors, the processor offers a memory capacity of 16K, 32K, or 64K words.  The 1747- L543 itself has 30 I/O module slots, 4096 input ports and output ports, and up to 64K memory. It has standard battery-backed RAM and backup flash memory. The 1747- L543 has a power load of 1A at 5V DC and 0A at 24V DC. The processor features LED indicators that provide status information for forced I/O, RS-232, DH+, CPU fault, and Run.  The average program scan time of the 1747-L543 is 0.9 ms/K and the typical I/O scan time is 0.225 ms. In case of power loss, the processor has a program scan hold-up time, dependent on the power load, ranging from 20 ms to 3 seconds. Additionally, the processor has a built in DH+ port for communications with other processors, terminals, and interfaces, and a built in RS‐232‐C communications port. The DH+ is beneficial because it is up to 3 times faster than the DH-485.


When installing the 1747- L543, you should take caution for electrostatic charges as they can damage the on-board memory. Additional care should be taken to prevent overheating by removing the wrapping before operation. The 1747-L543 must be inserted into the left slot (slot 0) to function properly. Never connect or disconnect any module with the power applied.


Allen Bradley SLC 5/04 Proc., 64K Mem., AB 1747-L 1747-L5 1747-L54

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PDF Electric & Supply Inc. sells new, new surplus and refurbished products which are sourced through independent channels. All warranties and support, if applicable, are with PDF Electric & Supply Inc. and not the manufacturer. PDF Electric & Supply Inc. is not an authorized distributor or representative for the listed manufacturers and makes no representations as to any quality control performed by any listed manufacturer on the products. The products listed on this website may vary as to their country of origin; the accessories, and other items included with the product; and the language used on the packaging, the parts, and any related instructions or printed material related to the products. This website is not sanctioned or approved by any manufacturer or tradename listed. Designated trademarks, brand names and brands appearing herein are the property of their respective owners.