Excellent PLC
Introduction
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
| Parameter | Specification | Description |
|---|---|---|
| Module Type | SLC 5/05 CPU Processor | Controls small to medium automation systems |
| User Memory | 16 KB | Stores logic, data, and configuration |
| Communication Ports | 1 × 10/100 Mbps Ethernet, 1 × RS-232/422/485 serial port | Provides network and serial communication |
| Programming Software | RSLogix 500 | For configuration and programming |
| Processor Speed | 0.37 µs per instruction | Fast execution for real-time control |
| Maximum I/O Modules | 30 local and remote modules | Supports distributed architectures |
| Expansion Capability | Up to 3 chassis via communication modules | Scalable system design |
| Communication Protocols | EtherNet/IP, DF1, DH485 | Supports multiple industrial protocols |
| Backplane Current (5V) | 800 mA | Drawn from SLC chassis |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) | Suitable for industrial environments |
| Storage Temperature | -40°C to +85°C (-40°F to 185°F) | Safe non-operational limits |
| Relative Humidity | 5%–95% non-condensing | Withstands harsh environments |
| Vibration Resistance | 10–500 Hz, 2 g | Meets IEC 60068-2-6 standards |
| Shock Resistance | 30 g operational | Industrial-grade ruggedness |
| Dimensions (H × W × D) | 145 mm × 51 mm × 150 mm (5.7″ × 2.0″ × 5.9″) | Standard SLC module size |
| Weight | 0.45 kg (1.0 lb) | Moderate weight for rack mounting |
Applications
The 1747-L551 CPU module is widely deployed across various industries where dependable, real-time control and communication are essential:
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Manufacturing Automation: Coordinates assembly lines and material handling systems.
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Water & Wastewater Treatment: Controls pumps, valves, and monitoring instrumentation.
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Food & Beverage Processing: Manages batch processes and temperature control.
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Packaging Machinery: Provides synchronized motion and sequencing control.
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Energy & Utilities: Supports monitoring and automation in distributed control networks.
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OEM Equipment: Integrates compactly into custom control panels and machinery.
Advantages
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Integrated Ethernet Port: Enables high-speed data communication with SCADA and HMIs.
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Reliable Performance: Proven SLC architecture ensures consistent control execution.
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Flexible Network Connectivity: Supports multiple communication protocols.
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High-Speed Processing: Executes ladder logic instructions in microseconds.
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Scalable Design: Supports local and remote I/O expansions.
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Easy Programming: Compatible with RSLogix 500 for intuitive configuration.
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Wide Application Support: Handles discrete, analog, and PID control functions.
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Industrial-Grade Durability: Built to withstand demanding conditions.
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Efficient Data Handling: Ideal for plant-level data collection and exchange.
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Backward Compatibility: Compatible with existing SLC 500 infrastructure.
