Allen-Bradley | 1747-L551 | SLC 500

Product Description: Allen-Bradley 1747-L551

The Allen-Bradley 1747-L551 is a member of the SLC 5/05 processor family within the SLC 500 series. It provides 16K words of user memory and features integrated Ethernet and DH-485 ports for communication. Designed for small to mid-range control applications, this module enables reliable monitoring and control of both discrete and analog I/O. It is suitable for networked environments requiring remote programming, diagnostics, and data collection.

Key Features

• 16K words user memory
• Built- in Ethernet (10/100 Mbps) and DH-485 ports
• Supports up to 4096 input and 4096 output points
• Supports up to 30 local I/O modules
• Advanced instruction set including floating-point math
• Real-time clock with battery backup
• EEPROM or Flash memory module support for program backup
• RSLogix 500 software compatible
• LED indicators for status, communication, and diagnostics

Technical Specifications

• User Memory: 16K words
• Communication Ports: 1 x Ethernet (RJ45), 1 x DH-485
• Max Local I/O Modules: 30
• I/O Capacity: 4096 inputs + 4096 outputs
• Ethernet Speed: 10/100 Mbps
• Programming Software: RSLogix 500
• Backup Options: EEPROM or Flash memory
• Battery Backup: Yes
• Operating Temperature: 0°C to 60°C
• Storage Temperature: -40°C to 85°C
• Power Consumption: 1.0 A @ 5V DC, 0.020 A @ 24V DC
• Mounting: SLC chassis slot
• Certifications: UL, CE, CSA

Application Areas

• Machine control and factory automation
• Process monitoring systems
• Distributed industrial control networks
• Small to medium discrete and analog control tasks
• Ethernet-connected systems requiring remote diagnostics and access

Advantages

• Integrated Ethernet simplifies communication setup
• Sufficient memory for small to mid-size logic applications
• Flexible programming with RSLogix 500
• Reliable performance with broad I/O support
• Easy integration with existing SLC 500 platforms