Empowering Industrial Longevity: Why the Allen-Bradley 1785-ME64-A is the Essential Anchor for Modern Factory Re-Industrialization

    Written by Tina Jiang , Director of Spare Center

  Tina Jiang has accumulated several years of experience in industrial sales and technical support, with a strong focus on automation systems and machine condition monitoring. In her daily work, she communicates closely with customers, prepares quotations, and recommends appropriate solutions for industrial control and monitoring needs.

  She also assists clients in sourcing replacement components, including hard-to-find or discontinued parts. Additionally, she coordinates with engineering teams and suppliers to ensure smooth project progress—helping maintain timely deliveries and competitive pricing so customers can minimize equipment downtime and keep operations running efficiently.

To ensure seamless integration into your existing architecture, the 1785-ME64-A(Allen-Bradley Memory Module) adheres to rigorous industrial standards. 

Memory Type: Non-volatile EEPROM (Series A)

Storage Capacity: 64,000 (64K) 16-bit words

Compatible Processors: PLC-5/40, PLC-5/40L, PLC-5/60, and PLC-5/60L (including Enhanced and Ethernet variants)

Operating Temperature: 0°C to 60°C (32°F to 140°F)

Storage Temperature: -40°C to 85°C (-40°F to 185°F)

Relative Humidity: 5% to 95% (non-condensing)

Installation Method: Direct plug-in to the processor's memory expansion port

Key Features of the 1785-ME64-A(Allen-Bradley Memory Module):

High-Capacity Reliability: The 1785-ME64-A provides one of the largest memory footprints available for the legacy PLC-5 line, accommodating extensive rungs of ladder logic and large data tables.

Non-Volatile Security: Unlike standard RAM, the 1785-ME64-A Memory Module does not require a battery to retain its contents, protecting your intellectual property and process settings for decades.

Hardware Write Protection: The 1785-ME64-A Memory Module includes safeguards to prevent unauthorized or accidental modification of the stored program once it has been finalized.

Legacy Stability: Specifically designed for the Series A hardware revision, the 1785-ME64-A Memory Module offers perfect timing and electrical synchronization with classic industrial chassis.

Allen-Bradley 1785-ME64-A

Allen-Bradley 1785-ME64-A

Allen-Bradley 1785-ME64-A

Allen-Bradley 1785-ME64-A

Q: Can the 1785-ME64-A Memory Module be installed while the PLC power is on?
A: No, to protect the 1785-ME64-A Allen-Bradley and the processor, you must always remove power from the chassis before inserting or removing the 1785-ME64-A module to avoid electrical arcing.

Q: Does the 1785-ME64-A Memory Module require special software for programming?
A: The 1785-ME64-A Allen-Bradley is managed through standard RSLogix 5 software, where users can select the "Store to EEPROM" function to transfer the project to the 1785-ME64-A.

Q: Is the 1785-ME64-A Memory Module compatible with the PLC-5/11 or 5/20?
A: The 1785-ME64-A Allen-Bradley is specifically designed for the higher-tier PLC-5/40 and 5/60 processors; smaller processors typically require memory modules with lower capacities than what the 1785-ME64-A provides.

Q: What is the difference between the 1785-ME64-A Memory Module and a standard RAM module?
A: The 1785-ME64-A Allen-Bradley is permanent storage (EEPROM), whereas RAM is temporary; the 1785-ME64-A Allen-Bradley is used for backup and disaster recovery rather than active execution memory.

If you want to more details，please contact me without hesitate. Email：sales@sparecenter.com

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