Name: 1747-L551/D
Brand: Allen-Bradley
SKU: 1747L551D
Price: 2115.00 USD
Availability: PreOrder

Rockwell Automation > PLC & HMI > Controllers > SLC 500 > 1747-L551/D

Overview

Allen-Bradley 1747-L551 SLC 5/05 Processor 16K Memory, Series D

Mfr. Part Number:	1747-L551/D

Manufacturer:	Allen-Bradley / Rockwell Automation

Description:	Allen-Bradley 1747-L551 SLC 5/05 Controller, 16K, Ethernet & RS-232, Series D

Full Description:	Allen-Bradley 1747-L551 SLC 500 SLC 5/05 CPU Controller, 16K Memory, Ethernet & RS-232 Communication Ports, Series D

UPC / GTIN:	10662072745622

Status:	Discontinued by manufacturer

Inventory & Prices

PLCH is Not Authorized Distributor of this product

Condition:

UPP (Used PLCH Packaging)

Warranty:

One Year PLCH Warranty.

Manufacturer's Warranty & Support DO NOT apply.

Availability:

1 available for pre-order

Shipping Date:

Ships on Jun 11, 2026

Estimated Value:

Your Price:

$2,115.00

Quantity:

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Disclaimer

PLC Hardware (PLCH) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens or any other Manufacturers. PLCH is NOT Authorized Dealer of this product. The product may be of older version, date codes or design than that available from authorized dealers. As PLCH is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. PLCH sells pre-owned SURPLUS and USED equipment ONLY and DOES NOT sell SOFTWARE or FIRMWARE licenses. Some hardware products may contain software and firmware and may not be legally operated without first obtaining a proper license from the manufacturer. PLCH makes no representation as to whether a product will or will not have software or firmware and, if it does, whether the software or firmware is the revision level that you need for your application. PLCH also makes no representations as to your ability or right to download or otherwise obtain software or firmware for the product from Original Manufacturer, its distributors, or any other source. PLCH also makes no representations as to your right to install any such software or firmware on the product. PLCH will not obtain or supply software or 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 software or firmware. Customer acknowledges and agrees that PLCH DOES NOT provide any software, firmware, operating system or right-to-use licenses with the products it sells. Customers understand and agree that proper software (firmware) licensing, maintenance and upgrades are subject to applicable manufacturer's Licensing Agreement or similar document.

Similar Parts	Mfr	Cond	Description	Est Val	Price	Stock	Qty

1747-L551/B	RA	UPP	Allen-Bradley 1747-L551 SLC 5/05 Controller, 16K, Ethernet & RS-232, Series B		$872.00	in stock	2
1747-L551/C	RA	UPP	Allen-Bradley 1747-L551 SLC 5/05 Controller, 16K, Ethernet & RS-232, Series C		$1,182.00	3 days	14

Specs & Technical Data

Specifications:	1747-L551 SLC 5/05 Processor, User Memory, Max: 16K words total (12K words for data or prog., 4K words for data only); Number of I/O: 4096 in + 4096 out absolute maximum; Local Analog I/O, Max: 480; Program Scan Time/Kword: 0.9 ms (typ); I/O Scan Time: 0.225 ms (typ); No. of Local I/O Chassis, Max: 3; No. of I/O Module Slots in the Local I/O Chassis, Max: 30; Communication Ports : Ethernet & RS-232 (RS-232 port can also be configured for a DH-485 network); Backup Memory: Flash; Battery-backed RAM: Standard.

Miscellaneous:	Allen-Bradley 1747-L551 SLC 5/05 Series C processors support communication speed of 100 Mbps over the Ethernet with Auto-Negotiation, support increased Ethernet connections (32 connections for 1747-L551) and provide HTTP server capability. Only 1747-M13 64 K Flash EPROM Memory Module can be used with 1747-L551 controllers. The 1747L551 SLC5/05 support both CSP and EIP protocols (“dual-stack”) concurrently on the same Ethernet cable at the same time.