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1747-L542

Allen-Bradley 1747-L542 SLC 5/04 32KB Modular CPU Processor Unit

In stock (12 units), ready to be shipped

  • Manufacturer: Allen-Bradley

  • Product No.: 1747-L542

  • Product Type: CPU Processor Module

  • Product Origin: USA

  • Payment:T/T, Western Union

  • Weight: 450g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Description

Product Overview

The 1747-L542 is an advanced SLC 5/04 modular processor unit engineered by Allen-Bradley (Rockwell Automation) for the SLC 500 hardware series. Installed in slot zero (0) of compatible modular chassis, this controller features 32 KB of battery-backed user RAM (32,000 words total capacity split into 4K data and 28K program storage) and supports up to 4,096 discrete inputs, 4,096 discrete outputs, and 480 analog I/O points across a maximum of 3 local chassis and 30 slots. Equipped with built-in RS-232 and Data Highway Plus (DH+) communication ports, it delivers rapid performance with a 0.9 ms/K typical program scan time and a backplane current draw of 1 A at 5 V DC and 175 mA at 24 V DC.

Core Technical Advantages

  • High I/O Capacity: Manages up to 4,096 discrete inputs, 4,096 discrete outputs, and 480 analog channels across 30 local slots.
  • Integrated Dual Communication: Features native RS-232 and Data Highway Plus (DH+) ports for seamless HMI, SCADA, and peer-to-peer messaging.
  • Robust Memory & Diagnostics: Combines 32 KB battery-backed RAM (1747-BA) with comprehensive status LEDs for run, fault, battery, and port activity.

Technical Specifications

Parameter Specification Details
Brand & Manufacturer Allen-Bradley (Rockwell Automation)
Series & Module Type SLC 500 Series / SLC 5/04 Processor
Catalog / Part Number 1747-L542
User Memory Capacity 32 KB / 32,000 Words (Battery-Backed RAM)
Discrete I/O Points 4,096 Inputs and 4,096 Outputs (Max)
Analog I/O Points 480 Maximum Local Analog I/O
Chassis & Slot Capacity Max 3 Local Chassis / 30 Slots Total
Processing & Scan Times Program Scan: 0.9 ms/Kword; I/O Scan: 0.225 ms; Bit Execution: 0.37 ms
Communication Ports Data Highway Plus (DH+) and RS-232
Memory Backup Options Battery Backup (1747-BA) / Flash EPROM (1747-M13)
Backplane Current Draw 1 A at 5 V DC and 175 mA at 24 V DC
Operating Ambient Temperature 0°C to 60°C (32°F to 140°F)
Product Net Weight Approx. 0.45 kg (1.00 lbs)

Industrial Applications

  • Discrete Manufacturing Plants: Coordinates large-scale sequential automation across multi-chassis production lines.
  • Process Control & SCADA Nodes: Interfaces local machinery with supervisory HMI and control networks via DH+.
  • Legacy System Upgrades: Replaces older SLC 500 processors to expand program memory and communication bandwidth.

Wiring & Installation

  • Slot Placement: Insert the 1747-L542 processor securely into Slot Zero (0) of compatible 1746 modular chassis racks.
  • Communication Cabling: Connect RS-232 programming cables or Data Highway Plus (DH+) multi-drop network lines to respective ports.
  • Power & Battery Check: Ensure system power supply is seated on the far left and verify backup battery (1747-BA) connection.

Engineering Advantages

  • High-Speed Execution: 0.37 ms bit execution and fast scan times maintain strict loop control in automated tasks.
  • Robust Environmental Tolerance: Operates reliably from 0°C to 60°C with 5% to 95% non-condensing humidity endurance.
  • Flexible Networking: Built-in DH+ protocol enables high-speed data exchange with PLC-5 and other Allen-Bradley systems.

Technical FAQs

Q1: What is the total user memory capacity of the Allen-Bradley 1747-L542?
A1: The processor provides 32 KB (32,000 words) of user memory, partitioned into data and program storage.

Q2: Which communication interfaces are integrated into this SLC 5/04 processor?
A2: It features built-in Data Highway Plus (DH+) and RS-232 communication ports.

Q3: What chassis slot must the 1747-L542 processor be installed in?
A3: The controller must be installed directly into Slot Zero (0) of the local modular I/O chassis.

Product Resources

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🏷️ Tags: CPU Processor Unit
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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.

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