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1747-L551

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

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  • Manufacturer: Allen-Bradley

  • Product No.: 1747-L551

  • Product Type: Processor Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 500g

  • Shipping port: Xiamen

  • Warranty: 12 months

30-Day Return Policy · 12-Month Warranty
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Description

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

The Allen-Bradley 1747-L551 is a high-performance SLC 5/05 modular processor designed for demanding industrial automation and discrete control applications. Featuring 16 KB of battery-backed user memory (expandable up to 64K via the 1747-M13 module), this processor manages up to 4,096 input/output points and 480 analog I/O channels. Equipped with an integrated 10/100 Mbps Ethernet port and an RS-232 communication channel supporting DF1 and DH-485 protocols, it delivers fast program execution speeds of 0.9 ms/K. Designed for slot zero installation in SLC 500 chassis systems, it ensures robust plant-wide networking, HMI integration, and real-time process monitoring. Weighing approximately 0.5 kg (1.1 lbs), it provides a compact yet powerful computing core for industrial control enclosures.

Technical Specifications

Manufacturer & Brand Allen-Bradley / Rockwell Automation
Catalog Number / Part No. 1747-L551
Product Family & Series SLC 500 / SLC 5/05 Modular Processor
User Memory & Backup 16 KB (16,000 Words) RAM | Optional 1747-M13 (64K) & 1747-BA Battery
I/O Capacity & Limits 4,096 Inputs / 4,096 Outputs | 480 Analog I/O | Max 30 Chassis Slots
Communication Ports 1x 10/100 Base-T Ethernet Port | 1x RS-232 Channel (DF1, DH-485, Modem)
Scan Time Performance Program Scan: 0.9 ms/K | I/O Scan: 0.225 ms
Environmental Limits Operating Temp: 0°C to 60°C (32°F to 140°F) | 5–95% Non-Condensing Humidity
Shock & Vibration Resistance Operating Shock: 30G | Operating Vibration: 2.5G @ 5–2000 Hz
Chassis Slot & Net Weight Exclusive Slot 0 (Zero) Installation | Approx. Net Weight: 0.5 kg (1.1 lbs)

Quick Installation Guide

  • Ensure all chassis power is disconnected before installing or removing the 1747-L551 processor module.
  • Insert the processor securely into Slot 0 (the leftmost slot) of the primary SLC 500 modular chassis.
  • Connect Ethernet and RS-232 communication cables, verify battery and memory module seating, then restore power to initiate system startup.

Technical FAQs

Q1: What is the user memory capacity of the Allen-Bradley 1747-L551 processor?
A1: It comes with 16 KB (16,000 words) of user memory, which can be expanded up to 64K using an optional 1747-M13 memory module.

Q2: Which communication interfaces are built directly onto this SLC 5/05 module?
A2: It features an integrated 10/100 Base-T Ethernet port for high-speed messaging and an RS-232 port supporting DF1 full/half-duplex and DH-485 protocols.

Q3: In which slot of the chassis must the 1747-L551 processor be installed?
A3: This processor is designed to be exclusively installed in Slot 0 (the first slot on the left) of the SLC 500 chassis.

Product Resources

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🏷️ Tags: Processor Module
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  • Ensure compatibility with your current machinery or control systems.
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  • Follow manufacturer instructions and best practices during installation.

In-stock items are typically dispatched the same business day. For products not currently in stock, dispatch times may vary based on availability. International shipping is available, and shipping costs are calculated according to destination, weight, and carrier selection.

Returns are accepted within 30 days of receipt, provided items are unused and in original condition. Return shipping costs are the responsibility of the customer. Please contact us before returning any item to receive return authorization.

For more details, please review our Shipping & Return Policy.

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