Product Details
Product Overview
The Allen-Bradley 1785-L40L stands as a high-capacity central processing unit within the classic PLC-5 family. This standard processor manages complex automation tasks by coordinating extensive I/O networks and executing sophisticated control logic. It features 48 Kilowords of user memory and supports a vast I/O capacity of up to 2048 points. We offer this module in 100% Brand New condition, providing a definitive solution for maintaining or expanding large-scale industrial operations that rely on the proven PLC-5 architecture.
Technical Specifications
The following parameters define the high-performance capabilities of the 1785-L40L:
| Parameter | Specification |
| Processor Type | PLC-5/40L Standard Processor |
| Max User Memory | 48 Kilowords |
| Max Total I/O | 2048 (any mix) |
| Max Analog I/O | 2048 |
| I/O Scan Time | 0.5 ms (Extended Local) |
| Max I/O Chassis | 61 Total (16 Extended Local / 32 Universal Remote) |
| Communication Ports | 1 x RS-232-C/422-A/423-A |
| Backup Memory | EEPROM Support (via 1785-ME/M modules) |
| RAM Type | Battery-Backed Static RAM |
Engineering Advantages
The 1785-L40L solves complex integration and uptime challenges in established industrial facilities:
-
Massive Networking Flexibility: This processor manages up to 61 I/O chassis across universal remote and extended local links. This capability allows engineers to centralize control for massive production lines without sacrificing localized response times.
-
Rapid Logic Execution: With a scan time as low as 0.5 ms for extended local racks, the 1785-L40L handles high-speed discrete and analog signals with precision, reducing jitter in sensitive control loops.
-
Dual-Tier Data Protection: The module utilizes battery-backed RAM for active runtime data and supports EEPROM program backup. This dual approach prevents costly program loss during extended power outages or battery failures.
-
Legacy System Longevity: Installing a Brand New 1785-L40L eliminates the risks associated with used or refurbished units, such as unknown component fatigue or degraded capacitors. This ensures your validated system continues to operate for years without requiring a full, disruptive migration to newer platforms.
FAQs
-
What memory backup options does the 1785-L40L support?
The processor uses battery-backed static RAM as standard. For non-volatile program storage, you can utilize the 1785-ME16, -ME32, -ME64, or -M100 EEPROM modules to ensure your logic remains intact without power.
-
How many I/O points can this processor handle?
The 1785-L40L supports a maximum of 2048 I/O points in any mix, or 2048 inputs and 2048 outputs in a complementary configuration, making it suitable for large-scale plant automation.
-
Is this a Brand New original product?
Yes. This unit is 100% Brand New and original. While the PLC-5 series is a legacy line, our new-in-box stock provides the highest possible reliability and original factory performance specifications.
-
Can I use the Control Coprocessor Expansion port for extra tasks?
Yes. The 1785-L40L includes a coprocessor expansion port, allowing you to offload specialized tasks—such as advanced math or custom communication protocols—to a separate module without impacting the main CPU scan time
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
Navigating Industrial Automation Failures: Types, Causes, and Mitigation Strategies
Modern manufacturing relies heavily on automated control systems to maximize throughput and maintain product quality. However, unplanned downtime in industrial automation can cost facility operators thousands of dollars per hour. Understanding how programmable logic controllers (PLCs), distributed control systems (DCS), and field instrumentation fail empowers engineering teams to implement robust preventive maintenance strategies.
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.
The Role of Intrinsic Safety Barriers in PLC and DCS Architectures
Implementing robust protection in hazardous industrial environments represents a fundamental safety requirement in factory automation. Process facilities often handle volatile gases, dusts, and chemical agents that pose significant combustion risks. Consequently, control system engineers must deploy energy-limiting interfaces to isolate safe-area control cabinets from hazardous-area field instrumentation. This article examines the function, selection, and electrical principles of intrinsic safety barriers within modern PLC and DCS networks.