Product Details
Overview
The 1785-MJ by Allen-Bradley is a dedicated memory module designed for PLC-5 systems, providing secure program backup and reliable data storage. Optimized for standard PLC-5 processors, it ensures consistent system operation and safeguards critical control programs.
Technical Specifications
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Model: 1785-MJ
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Module Type: Memory Module
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Memory Capacity: 8K Words (6K SRAM usable)
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Write Protection: Removable jumper for added data security
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Primary Function: Program backup for PLC applications
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Supported Processors: Standard PLC-5 series
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Backplane Power Requirement: 2.5 A at 5 V DC
Compatibility
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PLC-2/17 Series: 1772-LW, 1772-LWP
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PLC-5 Series: 1785-LT (10), 1785-LT2 (12), 1785-LT3 (15), 1785-LT4 (25)
Environmental Conditions
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Operating Temperature: 0° to 60° C (32° to 140° F)
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Storage Temperature: –40° to 85° C (–40° to 185° F)
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Relative Humidity: 5–95% (non-condensing)
Size & Weight
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Dimensions: 2.18L x 1.73H x 0.69D in (55.4 x 43.9 x 17.4 mm)
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Weight: Approx. 0.34 kg
Additional Features
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Designed for secure program backup in PLC-5 systems
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No removal under power (RIUP) capability
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Compact form factor fits standard PLC-5 backplane
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Reliable SRAM ensures stable performance under industrial conditions
Applications
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Industrial PLC-5 automation systems
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Program backup and memory extension
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Control system redundancy and protection
FAQ
Q: Can this module be used in PLC-5 processors of all memory sizes?
A: Yes, it is compatible with all standard PLC-5 series processors.
Q: Does it support hot-swapping?
A: No, removal under power is not supported.
Q: What type of memory does it use?
A: It uses SRAM with write-protection jumper for secure backup.
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
Implementing FIFO and LIFO Data Sequencing in PLC Programming
Data management serves as a cornerstone of modern industrial automation. Whether tracking materials on a conveyor or managing batch sequences in a process, engineers frequently rely on sequential logic. Two primary structures—First-In-First-Out (FIFO) and Last-In-First-Out (LIFO)—form the bedrock of this data handling. Mastering these blocks allows programmers to optimize complex machine operations efficiently.
Evolving SCADA System Architectures in Industrial Automation
A robust Supervisory Control and Data Acquisition (SCADA) system serves as the heartbeat of modern industrial operations. Understanding SCADA system architecture is vital for engineers designing efficient control systems. These architectures have evolved from isolated, monolithic structures to highly interconnected, networked ecosystems. Choosing the right design requires balancing data visibility, processing power, and long-term scalability requirements.
Choosing the Right Controller: PLC vs. Motion Controller in Industrial Automation
Selecting the optimal control architecture is a foundational decision in industrial automation. Engineers must frequently choose between a Programmable Logic Controller (PLC) and a dedicated Motion Controller. While both systems manage machinery, their underlying design philosophies differ significantly, impacting performance, scalability, and system integration.