Product Details
Overview
The 1785-MR by Allen-Bradley is a 4K RAM memory module engineered for PLC-5 systems, offering reliable program storage and secure data backup. Designed for standard PLC-5 processors, this module ensures consistent system operation and protection of critical control programs.
Technical Specifications
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Model: 1785-MR
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Module Type: RAM Memory Module
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Memory Capacity: 4K Words
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Write Protection: Removable jumper for safe memory operation
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Primary Function: Program backup and temporary storage
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Supported Processors: Standard PLC-5 series
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Backplane Power Requirement: 2.5 A at 5 V DC
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Certifications: UL Listed, CSA Approved
Compatibility
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Works with PLC-5 processors including:
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1785-LT (PLC-5/10)
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1785-LT2 (PLC-5/12)
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1785-LT3 (PLC-5/15)
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1785-LT4 (PLC-5/25)
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 & Dimensions
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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. 340 g
Additional Features
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Compact and robust design for PLC-5 backplanes
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SRAM memory ensures stable, high-speed performance
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No removal under power (RIUP) support
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Easy integration into existing PLC-5 systems
Applications
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Industrial automation PLC-5 systems
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Program backup and memory extension
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Data protection and control system redundancy
FAQ
Q: Can this module be used with all PLC-5 processors?
A: Yes, it is compatible with all standard PLC-5 series processors listed above.
Q: Is hot-swapping supported?
A: No, removal under power is not supported.
Q: What type of memory is used?
A: This module uses SRAM with a removable write-protection jumper.
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
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Selecting the correct operating voltage is a critical step in designing reliable industrial automation systems. Whether you are working with a compact PLC or a large-scale DCS, your power architecture dictates the system's longevity. In this guide, we explore the standard voltage ranges and power distribution strategies required to maintain stable factory automation operations.
Optimizing Power Supply Sizing for Industrial Automation Systems
The power supply is the silent heartbeat of any industrial automation system. While engineers often prioritize processors and communication protocols, a stable power architecture remains the most critical factor for long-term reliability. In my 15 years of experience, I have found that neglecting power supply sizing often leads to ghost errors, intermittent field device failures, and costly production downtime.