Allen-Bradley 1747-L551 SLC 5/05 CPU Processor Module

The Allen-Bradley 1747-L551 is a SLC 5/05 processor module designed for small to mid-sized industrial control systems requiring reliable and high-speed performance. It features 16 KB of user memory, built-in Ethernet communication, and a high-speed serial port, enabling seamless data exchange and integration across multiple industrial networks.

This module is part of the proven Allen-Bradley SLC 500 family, known for its durability, scalability, and ease of maintenance. The 1747-L551 delivers robust control capabilities, supporting both discrete and analog I/O, PID loops, and advanced instruction sets — making it ideal for applications that demand dependable operation in process and discrete automation environments.

Technical Specifications

Applications

The 1747-L551 CPU module is widely deployed across various industries where dependable, real-time control and communication are essential:

• Manufacturing Automation: Coordinates assembly lines and material handling systems.

• Water & Wastewater Treatment: Controls pumps, valves, and monitoring instrumentation.

• Food & Beverage Processing: Manages batch processes and temperature control.

• Packaging Machinery: Provides synchronized motion and sequencing control.

• Energy & Utilities: Supports monitoring and automation in distributed control networks.

• OEM Equipment: Integrates compactly into custom control panels and machinery.

Advantages

• Integrated Ethernet Port: Enables high-speed data communication with SCADA and HMIs.

• Reliable Performance: Proven SLC architecture ensures consistent control execution.

• Flexible Network Connectivity: Supports multiple communication protocols.

• High-Speed Processing: Executes ladder logic instructions in microseconds.

• Scalable Design: Supports local and remote I/O expansions.

• Easy Programming: Compatible with RSLogix 500 for intuitive configuration.

• Wide Application Support: Handles discrete, analog, and PID control functions.

• Industrial-Grade Durability: Built to withstand demanding conditions.

• Efficient Data Handling: Ideal for plant-level data collection and exchange.

• Backward Compatibility: Compatible with existing SLC 500 infrastructure.

FAQs

1. Q: What is the memory size of the 1747-L551 processor?

   A: It has 16 KB of user memory for logic and data storage.

2. Q: Does this module support Ethernet communication?

   A: Yes, it has a built-in 10/100 Mbps Ethernet port.

3. Q: What programming software is used with the 1747-L551?

   A: It is programmed using RSLogix 500 software.

4. Q: How many I/O modules can the system support?

   A: It can support up to 30 local and remote I/O modules.

5. Q: What is the typical instruction execution time?

   A: Approximately 0.37 microseconds per instruction.

6. Q: Does the processor support PID control?

   A: Yes, it includes built-in PID instruction support for process control.

7. Q: Can the SLC 5/05 communicate with ControlLogix systems?

   A: Yes, via Ethernet/IP using bridging modules or gateways.

8. Q: What is the input power requirement from the backplane?

   A: It draws about 800 mA at 5V DC from the chassis.

9. Q: What are the supported communication protocols?

   A: EtherNet/IP, DF1, and DH485.

10. Q: What is the maximum operating temperature for the module?

    A: The module operates from 0°C to +60°C (32°F to 140°F).