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Allen Bradley - PLC SLC 500 1747-L551 Ser B QTY

AB Electric Supply Company

Allen Bradley - PLC SLC 500 1747-L551 Ser B QTY

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A2B Supply is NOT an authorized distributor for this manufacturer and therefore the manufacturer’s warranty does not apply.  Product comes with A2B Supply's 1-year warranty.

Rockwell Disclaimer: The product is used surplus. A2B Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because A2b Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, A2B Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. A2B Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. A2B Supply also makes no representations as to your right to install any such firmware on the product. A2B Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

General Information about the Product

Part Number

1747-L551 Ser B


The Allen-Bradley 1747-L551 processor is used for Allen-Bradley SLC 500 programmable controllers and supports addressing of 4096 I/O over 32 connections. The Allen-Bradley 1747-L551 processor includes an RS-232 port communication to send and receive ASCII characters and to connect to devices that communicate either through DF1 protocol or through DH-485 protocol and an Ethernet communication port which offers a high-performance network for program upload or download, online editing, and peer-to-peer messaging over vast distances. This processor provides a real-time clock/calendar and a user-configurable memory for either data storage or program storage which has a size of 16 kilo words with a basic set of 107 instructions. The 1747-L551 processor can operate at a temperature range of 0 degrees to 60 degrees Celsius (32 degrees to 140 degrees Fahrenheit). The Allen-Bradley 1747-L551 processor is used for applications which require both high-speed data transfer between information systems and/or a large number of controllers and internet/intranet connection.


A2B Supply Certified This is a multiple quantity listing and items may have a revision differing from that shown in the photos. Please contact us prior to purchase if you need a specific revision.


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We offer UPS Red Next Day Shipping in addition to the shipping options listed above, please contact us prior to purchase if you would like your item shipped out UPS Red the same day.


Items must be returned for any Refunds. Buyer pays return shipping.

Items may be returned for any reason, complete item must be returned within 30 days of the purchase date in the condition it was received for a full refund.

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