Allen Bradley 1747-L551 1747-OS501 C SLC 500 5 05 CPU Processor 16K PLC

Description:

The Allen-Bradley 1747-L551 SLC 500 Processor is a PLC CPU module used in SLC 5/05 automation systems. Commonly installed in industrial control racks to execute logic, manage I/O operations, and enable communication between field devices and network systems. Maintenance teams, OEMs, and system integrators use this processor for replacement, retrofit, and reliable control of industrial automation processes.

Applications:

The Allen-Bradley 1747-L551 SLC 500 Processor is used in industrial automation systems requiring centralized control and communication, including manufacturing lines, material handling systems, packaging equipment, and process control. It is ideal for applications that demand Ethernet connectivity, stable PLC performance, and integration with legacy SLC 500 platforms.

Technical Specifications:

• Brand: Allen-Bradley (Rockwell Automation)
• Part Number: 1747-L551 / 1747-OS501
• Product Type: PLC CPU Processor Module
• Series: SLC 500 (SLC 5/05)
• User Memory: 16K words
• Communication Ports: Ethernet (Channel 1), RS-232 (Channel 0)
• I/O Capacity: Up to 4096 inputs and 4096 outputs
• Analog I/O Support: Up to 480 analog points
• Maximum Connections: Up to 32 simultaneous connections
• Scan Time: Approx. 0.9 ms per Kword
• Mounting Type: Chassis-mounted (SLC 500 rack)
• Memory Backup: Battery-backed RAM
• Lifecycle Status: Discontinued (support/repair available)
• Application: Industrial automation control and communication

Common Replacements:

• Allen-Bradley 1747-L552
• Allen-Bradley 1747-L553
• Allen-Bradley 1769-L32E