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Home > Consumer Electronics > Display & Accessories > LCD Module > 1747-L551 Allen Bradley SLC500 System CPU MODULE 1747L551

1747-L551 Allen Bradley SLC500 System CPU MODULE 1747L551

Product Spotlights

Genuine Allen-Bradley 1747-L551 SLC500 CPU Module with 16K program/16K data memory, built-in DH-485/RS-232C/RS-422/485, easy integration. Trusted supplier since 2011, ISO certified, global shipping.

Negotiable MOQ: 1 Piece (Price negotiable depending on order volume and customization)

Key Specifications

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Type:

Other, SLC 500 System CPU Module

Brand:

Allen-Bradley

Model:

1747-L551 / 1747L551

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Rossonix Co.,limited

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Type Other, SLC 500 System CPU Module

Brand Allen-Bradley

Model 1747-L551 / 1747L551

Memory 16K User Program, 16K Data

Communication Ports DH-485, RS-232C, RS-422/485 (built-in)

Power Supply 24V DC (typical, via backplane)

Operating Temperature 0°C to +60°C

Application Industrial Automation, Process Control

Compatibility SLC 500 Chassis & I/O Modules

Certification ISO 9001, ISO 9000 (per supplier)

Rossonix Co., Limited is proud to offer the Allen-Bradley 1747-L551 (1747L551) SLC 500 System CPU Module — a reliable, high-performance processor designed for demanding industrial automation environments. With over a decade of experience in supplying automation components, our team ensures that every unit is carefully inspected and tested before shipment. This CPU module delivers robust control with 16K user program memory and 16K data memory, making it ideal for medium-to-large-scale control applications. Built to integrate seamlessly with the SLC 500 platform, it provides stable communication via built-in DH-485, RS-232C, and RS-422/485 ports, offering flexibility for various network architectures.

The 1747-L551 stands out for its exceptional processing speed and reliability, ensuring minimal downtime in critical operations. It supports a wide range of I/O modules, allowing for customized system expansion. Whether you are upgrading an existing SLC 500 system or building a new control network, this CPU module offers a cost-effective solution without compromising on performance.

Key Features & Technical Specifications

Memory Capacity: 16K User Program + 16K Data — sufficient for complex logic and data handling.
Built-in Communication Ports:

1 x DH-485 (programming & networking)
1 x RS-232C (printer, HMI, or modem connection)
1 x RS-422/485 (multi-drop or remote I/O)

Backup Battery: Lithium coin cell (maintains program/data during power loss, replaceable).
Operating Voltage: 24V DC via backplane (supplied by SLC 500 chassis).
Operating Temperature: 0°C to +60°C (32°F to 140°F) — suitable for harsh industrial environments.
Compatible with: All SLC 500 series chassis (1746-Axxx, 1747-Axxx) and I/O modules.
Programming Software: RSLogix 500, Rockwell Software.

Technical Parameters (Table)

Parameter	Specification
Model Number	1747-L551 / 1747L551
Processor Type	SLC 500 CPU Module
Memory (User Program)	16K words
Memory (Data)	16K words
Communication Ports	DH-485, RS-232C, RS-422/485
Power Consumption	Typical 3.5W (supplied via backplane)
Clock/Calendar	Built-in, battery-backed
Weight	Approx. 0.5 kg (1.1 lbs)

Customer Benefits

Increased Productivity: Faster processing and larger memory allow more complex control logic, reducing cycle times.
Easy Integration: Standard SLC 500 form factor and communication protocols enable straightforward replacement or upgrade.
Reliable Long-Term Operation: Robust design and wide temperature range ensure consistent performance even in demanding conditions.
Cost Savings: Utilize existing SLC 500 chassis and I/O modules — no need to replace entire system.
Global Support: Our company ships to over 10 markets worldwide, with fast delivery from Shenzhen, Hong Kong, and Europe.

Why Choose Rossonix Co., Limited?

Established in 2011, Rossonix has grown into a trusted supplier of industrial automation components with an annual export value of US$5 million to US$10 million. We maintain an overseas office and serve clients across North America, Europe, South America, Oceania, the Middle East, and Asia. Our products are sourced from reliable channels and undergo strict quality checks. With ISO 9001/9000 certification, we commit to delivering genuine and functional parts. From Shenzhen, Hong Kong, and European ports, we ensure timely delivery and responsive after-sales service. Choose 1747-L551 from Rossonix — a reliable partner for your automation success.

Frequently Asked Questions (FAQ)

Q: Is the 1747-L551 compatible with older SLC 500 chassis?
A: Yes, the 1747-L551 is designed to work with all standard SLC 500 chassis (e.g., 1746-A4, 1746-A10, 1747-A10). It plugs directly into the backplane.
Q: What programming software is required?
A: This CPU module can be programmed using Rockwell Automation's RSLogix 500 software (version 7.0 or later recommended).
Q: Does the module come with a battery installed?
A: Yes, a lithium backup battery is included. The battery retains the program and data during power outages; replacement is available upon request.
Q: What is the difference between 1747-L551 and 1747-L551B?
A: The 1747-L551 is the standard model, while the “B” version may refer to a later revision. The functional specifications are generally identical; please check with our team for exact revision details.
Q: Can this CPU module be used as a standalone unit without a chassis?
A: No, the 1747-L551 requires an SLC 500 chassis with a backplane to provide power and I/O connectivity.
Q: What is the lead time for shipping to North America?
A: We ship from our Shenzhen, Hong Kong, and European warehouses. Typical delivery time to North America is 5–10 working days, depending on the selected courier.
Q: Do you offer warranty on this product?
A: Yes, we provide a 12-month warranty against manufacturing defects. Extended warranty options are available upon request.
Q: Can I get a datasheet or manual for the 1747-L551?
A: Of course. Please contact our sales team, and we will email you the official Rockwell Automation manual (publication 1747-UM002) and a product datasheet.