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        • Lifecycle status

          Active / Available from OEM
          Apter Power verifies series, chip layout, stored-program identity, condition, and documentation before coordinating supply.

        1745-M1

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        1745-M1 preserves an SLC 100 or SLC 150 control program in removable nonvolatile EEPROM memory for controlled storage and recovery work.
        In Stock
        Ships by Thursday, October 29
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        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.
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        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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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for 1745-M1

        • Manufacturer:
          Allen-Bradley
        • Part Number:
          1745-M1
        • Product Family:
          SLC 100
        • Product Type:
          SLC 100/150 EEPROM Memory Module
        • Stock:
          1
        • Memory type:
          Electrically erasable programmable read-only memory (EEPROM)
        • Memory capacity:
          1200 words maximum
        • Supported controllers:
          SLC 100 and SLC 150
        • SLC 150 Series A condition:
          28-pin chip required
        • Program operations:
          Store RAM to EEPROM; load EEPROM to RAM
        • Operating temperature:
          0…60 °C
        • Storage temperature:
          -40…85 °C
        • Tariff Code:
          Please confirm the destination before shipping
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Program Transfer Auto-Load Control Series Compatibility Product Applications

        Features:

        • Nonvolatile program copy: EEPROM retains an SLC control program outside processor RAM
        • Two-way service workflow: store RAM to the module or load the module image into RAM
        • Series-aware selection: SLC 150 use distinguishes Series B from 28-pin Series A hardware
        1745-M1 provides a removable program-storage path for SLC 100 and SLC 150 controllers without becoming the execution memory.

        Its most important engineering distinction is the load direction: restoring the EEPROM replaces the RAM program, while storing replaces the previous EEPROM image.

        Acceptance should connect module series, chip layout, labeled program identity, processor catalog, and a verified archive before power is restored.
        Apter Power can review 1745-M1 series evidence, controller identity, program-handling needs, and condition before quotation.
        Allen-Bradley 1745-M1 SLC 100/150 EEPROM Memory Module Manuals, Datasheets, Links
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Store direction: use the documented procedure to copy the approved processor RAM program into EEPROM.
        • Load direction: recognize that an EEPROM-to-RAM transfer erases the previous RAM program.
        • Program identity: label every module for the controller and application it is intended to restore.
        • SLC 100 startup: the processor can duplicate the EEPROM contents into RAM when the documented Run-mode sequence is followed.
        • SLC 150 protection: access-code relationships determine whether automatic loading is permitted.
        • Retentive-state impact: programmable auto-load clears the I/O table and resets retentive instructions to their initial states.
        • Series B path: use the documented later-series module for SLC 150 service.
        • Series A inspection: confirm the required 28-pin chip before assigning an older module to an SLC 150.
        • Power isolation: de-energize the processor before inserting, seating, or removing the module.
        • Verified program backup: retain a removable EEPROM copy of an approved SLC 100 or SLC 150 application.
        • Controlled processor recovery: reload a known module image into processor RAM after the target identity is confirmed.
        • Maintenance transfer: move an identified program copy between documented compatible controllers under an approved change procedure.
        Description
        1745-M1 is the removable EEPROM memory module documented for Allen-Bradley SLC 100 and SLC 150 programmable controllers. Its nonvolatile storage holds as many as 1200 words, giving maintenance teams a transportable program copy that remains separate from the processor RAM used during execution.

        Program handling with 1745-M1 is directional: an approved RAM image can be stored in the module, while a module image can be loaded back into processor RAM. The official auto-load procedures differ between SLC 100 and SLC 150 operation, and a load replaces the program already held in RAM.
        Revisions

        Revision Part #

        Also known as

        1745-M1 Series A
        28-pin chip required for SLC 150 use
        Get Parts Quote
        1745-M1 Series B
        Documented for SLC 150 use
        Get Parts Quote
        Alternative Names
        1745M1 1745 M1 SLC 100 EEPROM Memory Module SLC 150 EEPROM Memory Module Bulletin 1745 EEPROM Module
        Technical notes
        Series B 1745-M1 hardware is documented for SLC 150 service, while Series A requires the specified 28-pin chip. This distinction determines whether the memory module can be assigned to that processor; if the series marking or chip layout is unclear, stop before installation because Rockwell Automation warns of improper operation.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        Why can 1745-M1 overwrite a valid controller program immediately after power is restored?
        An installed module can trigger the documented auto-load path and replace the processor RAM contents. Isolate power, confirm the intended image and access-code conditions, and place the controller in a controlled state before insertion.
        What must be inspected before 1745-M1 is assigned to an SLC 150 processor?
        Read the module series and inspect the chip configuration. Accept Series B, or Series A only when the documented 28-pin chip is present; stop if the label or chip evidence is unclear.
        How should a maintenance team prove that 1745-M1 contains the correct machine program?
        Match the module label to the machine and controller, compare the archived program and access-code record, and load only during an approved outage with a recovery copy available.
        Why does error E52 appear after editing a program while 1745-M1 remains installed?
        The processor RAM image no longer matches the EEPROM copy. Review and approve the edit, then store the revised RAM program to EEPROM before returning to Run mode if the module is meant to hold the current version.
        What state information can be lost when programmable auto-load uses 1745-M1 on an SLC 150?
        The official procedure clears the I/O table and returns retentive instructions such as latches, timers, counters, and sequencers to initial states. Plan the restart sequence and field-state validation before cycling power.
        Which records should accompany an urgent RFQ for 1745-M1?
        Provide clear catalog and Series photographs, a chip-layout image for Series A, the target SLC 100 or SLC 150 catalog, required quantity, condition, destination, and outage date. Keep program files out of the commercial request unless secure engineering review is arranged.

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