Allen-Bradley 1747-L551 | SLC 5/05 Processor for Modular Control Systems

Overview

The Allen-Bradley 1747-L551 is a high-performance SLC 5/05 modular controller from the SLC 500 family, designed for small to mid-sized automation systems. It features 16K words of memory, integrated Ethernet and RS-232 ports, and supports a total of 4096 input and 4096 output points, making it ideal for industrial control applications that require fast processing, network flexibility, and scalable I/O.

Key Features

• User Memory: 16K words (12K for data or program, 4K for data only)

• I/O Capacity: Up to 4096 inputs and 4096 outputs (absolute max)

• Analog I/O Capacity: Up to 480 local analog channels

• Program Scan Time: 0.9 ms per Kword (typical)

• I/O Scan Time: 0.225 ms (typical)

• Local I/O Chassis Support: Up to 3 chassis

• I/O Module Slots (Total): Up to 30 across all chassis

• Communication Ports:

  • 1x Ethernet port

  • 1x RS-232 (configurable for DF1 full duplex, DH-485, or ASCII)

• Memory Backup:

  • Flash memory

  • Battery-backed RAM (standard)

• Processor Type: SLC 5/05

• Status Indicators: Processor, I/O, and communication LEDs

• Mounting: Standard chassis-based module

Applications

• Factory automation

• Packaging systems

• Conveyor and material handling

• Water and wastewater management

• Process control systems

Why Choose the 1747-L551?

• Reliable Performance: Proven scan times for time-sensitive processes

• Integrated Ethernet: Allows fast and flexible network communications

• Scalable System Design: Expandable across multiple chassis

• Backup & Redundancy: Flash and battery-backed RAM ensure data retention

• Multi-Network Support: Interfaces easily with legacy DH-485 and modern Ethernet systems

Order Now

The Allen-Bradley 1747-L551 controller is available for immediate shipment.