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      1785-MS

      CMOS RAM memory module
      In Stock

      Product Information:

      CMOS RAM memory module is

      intended to be used with the

      PLC-5/15 and -5/25 processors

      from the 1785 bulletin

      Warranty Policy
      We provide 1 year warranty for all remaining parts.
      The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
      Return Notice
      The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
      In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
      Shiping Mode
      Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
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      Moore automated offers a wide range of components, products and services related to industrial automation. We have a large surplus of stocks and are also distributors of new products from a variety of quality manufacturers.
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      Technical specifications for 1785-MS

      • Manufacturer:
        Allen-Bradley
      • Product Category:
        PLC System
      • Spare Part Number:
        1785-MS/A
      • Estimated shipping dimensions:
        10.5x2.6x5.6cm
      • Weight:
        0.24 kg
      • Tariff Code:
        8537101190
      • Country of origin:
        USA
      • Place of shipment:
        Xiamen, Fujian, China
      • Product Line:
        PLC 5
      • Device:
        Memory module
      • Type:
        CMOS RAM
      • Capacity:
        8,000 words
      • Compatibility:
        PLC-5/15 and -5/25
      • Mounting:
        I/O Rack
      • Operating temperature:
        0 to 60 degrees Celsius
      • Relative humidity:
        5 to95%
      • Stock:
        30
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      Manuals

      1785-MS.pdf

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      FAQ

      View All Faqs
      • What is the architectural purpose of the 1785-MS module within an Allen-Bradley PLC-5 control system?
        The 1785-MS is a dedicated CMOS RAM memory expansion module in the Allen-Bradley PLC-5 family. It provides 8 K words (16,384 bytes) of RAM used to augment the user program storage and data table capacity of compatible PLC-5 processors, enabling more complex logic and parameter management.
      • How does the 1785-MS module interface with PLC-5 processors and what installation topology does it support?
        The 1785-MS mounts directly onto an I/O rack associated with PLC-5 processors (such as PLC-5/15 and PLC-5/25), acting as an external RAM cartridge that interfaces with the processor’s memory bus to increase working memory for program execution and data retention.
      • How does the 1785-MS module impact system performance, particularly in logic execution and memory paging?
        By expanding available RAM via the 1785-MS, PLC-5 processors can maintain larger ladder logic and data structures in primary memory, reducing the need for overlay or segmented code execution and improving deterministic scan responsiveness in complex control applications.
      • How does the 1785-MS differ from other memory modules in the 1785 series, such as EEPROM or larger RAM options?
        The 1785-MS provides pure RAM expansion (8 K words), unlike EEPROM modules (e.g., 1785-MJ) which offer non-volatile backup of programs, and larger memory modules (e.g., 16 K word EEPROM). The 1785-MS is specifically used to increase volatile data and logic capacity rather than serve as permanent program backup.
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      Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.