Product Details
Overview
The Allen-Bradley 1747-L542 is a mid-range processor designed for the SLC 5/04 series, supporting moderate I/O and memory demands. It enables robust control and communication in legacy automation systems, compatible with both Data Highway Plus (DH+) and RS-232 protocols for programming and device interfacing. The module includes an integrated real-time clock, advanced instruction set, and battery-backed memory, offering reliable performance for a range of industrial applications.
Key Features
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Mid-range processing for moderate I/O and memory requirements
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DH+ networking for peer-to-peer communication with SLC, PLC, and PanelView devices
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RS-232 port supporting DF1, ASCII, and Modbus RTU protocols
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Advanced instruction set including math, PID, ASCII handling, and diagnostics
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Integrated real-time clock for time-based operations and data logging
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Supports battery backup for program and data retention
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Chassis-mounted installation compatible with SLC 5/04 racks
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Discontinued status with repair and replacement guidance from Rockwell Automation
Technical Specifications
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Manufacturer: Allen-Bradley
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Product Line: SLC 5/04 Series
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Part Number: 1747-L542
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User Memory: 32K words
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Communication Ports: DH+ (Data Highway Plus), RS-232 (DF1, ASCII, Modbus RTU)
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Instruction Set: Advanced (math, PID, ASCII, diagnostics)
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Real-Time Clock: Integrated
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Battery Backup: Supported
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Mounting Type: Chassis-based
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Power Supply Requirement: Separate supply needed
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Lifecycle Status: Discontinued, replacement recommended
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Repair Options: Available via Rockwell Automation support
Application Scenarios
The 1747-L542 processor is suitable for:
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Mid-range automation applications requiring reliable control and moderate memory
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Integration into existing SLC 500 or SLC 5/04 infrastructure
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Systems that require time-based logging or scheduling with the real-time clock
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Networks using DH+ or RS-232 communication for device and operator interface
FAQs
Q: Can the 1747-L542 processor interface with modern devices?
A: It supports legacy DH+ and RS-232 protocols. For newer devices, converters or protocol adapters may be required.
Q: How much memory is available for user programs?
A: The module includes 32K words of user memory for program storage.
Q: Is battery backup supported?
A: Yes, battery-backed memory retains program and data when power is off.
Q: What replacement options exist for discontinued units?
A: Rockwell Automation provides engineering replacement guidance and repair services.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Redundant Automation Systems: Ensuring Continuous Uptime in Critical Control Infrastructure
System reliability directly determines operational profitability across high stakes process industries. Modern industrial automation platforms must eliminate single points of failure to prevent catastrophic shutdowns. Deploying fault tolerant architecture safeguards complex facilities against unexpected hardware glitches, network disruptions, and maintenance outages.
Understanding Types of Noise in Electronic Circuits and Control Systems
Signal integrity directly determines measurement accuracy and loop stability across industrial automation environments. Electronic noise introduces unwanted stochastic interference into analog loops, sensor feedback lines, and digital fieldbus networks. Understanding how intrinsic electronic noise and external electromagnetic interference manifest allows control engineers to optimize signal conditioning and shield sensitive instrumentation effectively.
Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.