Product Details
Product Overview
The Allen-Bradley 1769-L31 functions as a robust, mid-range controller within the CompactLogix 5331 system architecture. This module provides a high-performance solution for machine-level control applications that require localized I/O and serial-based communication. It features 512 KB of user memory and supports complex discrete and basic process control loops. We supply this unit as 100% Brand New original factory stock, ensuring the hardware meets all original Rockwell Automation performance benchmarks for legacy system maintenance and new small-scale machine builds.
Technical Specifications
| Feature | Specification |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Line | CompactLogix (5331 Series) |
| User Memory | 512 Kilobytes |
| Communication Ports | Dual (2) RS-232 (Channel 0: Isolated; Channel 1: Non-isolated) |
| Protocols Supported | DF1, DH-485, ASCII |
| Max I/O Modules | 16 Modules (Supports up to 3 I/O Banks) |
| Battery Replacement | 1769-BA |
| Operating Temperature | 0°C to +60°C (+32°F to +140°F) |
| Vibration Rating | 5G @ 10 to 500 Hz |
| Programming Cable | 1747-CP3 or 1756-CP3 |
| Weight | 0.69 lbs (0.31 kg) |
Engineering Advantages
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Optimized Serial Connectivity: The 1769-L31 integrates two onboard RS-232 ports, eliminating the need for additional serial modules. Channel 0 provides full isolation to protect the controller from ground loops and electrical noise when connecting to external HMIs or modems.
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Scalable I/O Expandability: This controller manages up to 16 local 1769 I/O modules across three expansion banks. This scalability allows engineers to build high-density control systems within a compact DIN-rail footprint.
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Rugged Environmental Tolerance: The module withstands vibrations up to 5G and operates reliably in temperatures up to 60°C. These specifications ensure stable logic execution in harsh cabinet environments near heavy rotating machinery or high-heat processes.
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Simplified Programming Path: By utilizing standard DF1 and DH-485 protocols, the 1769-L31 integrates seamlessly into existing plant-wide serial networks. It supports 22-14 AWG solid copper wiring, providing secure physical connections for industrial-grade cabling.
FAQs
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Does the 1769-L31 support Ethernet/IP communication? No. The 1769-L31 relies exclusively on serial communication (RS-232). If your application requires Ethernet connectivity, consider the 1769-L32E or L35E models.
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How many I/O modules can I place on one side of the power supply? The 1769-L31 has a power supply distance rating. You must place I/O modules within 4 slots of the power supply to ensure sufficient current distribution across the backplane.
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Is the internal battery included? While the controller uses the 1769-BA battery for memory retention, we recommend verifying the battery status upon installation. As this is a 100% Brand New unit, the hardware is in pristine condition, but we suggest keeping a spare 1769-BA on hand.
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Can I use 1747-CP3 cables for programming? Yes. The 1769-L31 is fully compatible with both 1747-CP3 and 1756-CP3 serial cables for direct connection to a PC for configuration and logic uploads.
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
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.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.