Allen-Bradley 1747-M13 SLC 500 64KB EEPROM Memory Module

Product Introduction & Engineering Value

A dead PLC battery should never be able to erase years of machine development work. The 1747-M13 was designed as a safeguard for SLC 500 installations by storing controller programs in non-volatile memory. It plugs into compatible SLC processors and provides a recovery path when RAM backup power is lost.

For plants still operating SLC 5/03, SLC 5/04, and SLC 5/05 systems, this small memory module can be the difference between a controlled recovery and an extended production outage. It remains a commonly requested spare because many legacy machines continue running with proven SLC architectures.

Technical Specifications

The 1747-M13 is specified by Rockwell Automation as a 64 KB memory module for SLC 5/03, SLC 5/04, and SLC 5/05 controllers with supported Series C or later operating systems.

Field Application & The “Trench” Experience

A packaging plant operating an older SLC 5/04-controlled filling machine experienced a controller fault after a routine cabinet inspection. The PLC powered up, but the original battery-backed RAM data had become unreliable after years of service.

The maintenance team installed a verified 1747-M13 memory module containing the latest approved application program. After restoring the processor configuration and validating I/O operation, the machine returned to production without requiring a complete controls upgrade.

Typical applications include:

1. Packaging Line PLC Backup Systems
   Protecting machine sequencing programs for fillers, conveyors, and labeling equipment.
2. Legacy Material Handling Equipment
   Maintaining stored logic programs for automated warehouse and transfer systems.
3. Process Skid Control Panels
   Providing recovery memory for standalone SLC-based control cabinets.

1747-M13

1747-M13

Transparency SOP: QA & Testing

A proper 1747-M13 inspection process should include:

1. Physical Verification

• Confirm Allen-Bradley labeling and catalog number.
• Inspect connector pins and module housing.
• Check for corrosion, contamination, or mechanical damage.

2. Memory Validation

• Verify module recognition with compatible SLC hardware.
• Confirm read/write capability using approved programming equipment.
• Validate stored program integrity when applicable.

3. Final Preparation

• Package using ESD-safe protection.
• Record revision information.
• Maintain traceable inventory records.

The Veteran’s Tech Trap Guide

⚠️ Do not install the 1747-M13 into unsupported processors.
This module is intended for SLC 5/03, SLC 5/04, and SLC 5/05 processors with appropriate firmware versions. Older processors may not support it.

⚠️ Watch the 1747-M15 adapter revision.
If programming the 1747-M13 externally, a Series B 1747-M15 adapter is required. Using the wrong adapter revision can damage the memory module or programming equipment.

PRO TIP:
Before replacing a processor memory module, upload and archive the existing PLC program. A memory module is a backup device, not a substitute for proper program management.

⚠️ Avoid ESD exposure.
Flash memory devices can be damaged by static discharge. Always use proper handling procedures during installation.

Dynamic FAQ

1. What is the Allen-Bradley 1747-M13 used for?

The 1747-M13 is a 64 KB non-volatile memory module used with SLC 500 processors to store backup copies of user programs and data tables.

2. Which PLC processors support the 1747-M13?

It is designed for SLC 5/03, SLC 5/04, and SLC 5/05 processors with supported Series C or later firmware.

3. Can the 1747-M13 replace a PLC battery?

No. The memory module provides non-volatile storage, but the processor battery and controller functions remain separate components.

4. How is the 1747-M13 programmed?

Programming can be performed through compatible SLC processor tools or external programming equipment using the appropriate 1747-M15 Series B adapter.

5. Is the 1747-M13 still manufactured?

Rockwell Automation lists the 1747-M13 as discontinued, so current sourcing typically comes from new surplus, refurbished, or industrial spare-part suppliers.

6. What should be verified before purchasing a replacement?

Confirm:

• SLC processor model
• Firmware revision
• Existing memory module catalog number
• Stored program compatibility
• Required adapter type

7. Does New Surplus 1747-M13 stock include warranty?

New Surplus units are unused inventory items outside normal production channels. Warranty coverage depends on the supplier’s inspection process and commercial warranty terms. Refurbished units should include documented testing before installation.