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

Overview

The 1747-L551 is a high-performance SLC 500 processor module designed for industrial automation applications. It provides precise control over input, output, and analog signals while supporting advanced programming instructions and indirect addressing.

Memory and Backup

This module includes 16 KB of program memory with 16,000 words of user memory. It supports battery-backed RAM using the 1747-BA and can expand backup memory with the 1747-M13 module, providing up to 64 KB for reliable data retention.

I/O and Performance

The 1747-L551 can control up to 4096 input and 4096 output points, including 480 analog I/Os. Its typical program scan time is 0.9 ms per keyword, while I/O scan time is 0.225 milliseconds, ensuring rapid processing and efficient real-time control.

Communication and Networking

The module is equipped with an Ethernet port supporting 10/100 Base-T communication, SNMP, BOOTP, and extended messaging capabilities. The RS-232 port allows DF1 full duplex, half-duplex master, and DF1 radio modem communication, enabling peer-to-peer and remote I/O operations.

Features and Functions

• Channel-to-channel communication and DeviceNet pass-thru

• Built-in real-time clock and calendar

• Supports online and offline programming with runtime editing

• Advanced math instructions for complex automation processes

Environmental and Physical Specifications

• Operating temperature: 0 to 60 °C

• Operating shock: 30G

• I/O chassis: 3 with 30 module slots

• Weight and dimensions: consult the installation manual for precise physical details

Applications

The 1747-L551 is ideal for:

• Factory automation and process control

• Machine control systems

• Complex industrial motion and data processing applications