- Preserve the complete PLC-3 memory image rather than relying on a program-only backup
- Include data areas, procedures, program contexts, and message storage in the restoration plan
- Verify retained-data behavior and the restored machine sequence before returning to production
1775-MED supplies the documented 131,072-word memory option for a PLC-3 processor chassis.
Its larger capacity can hold extensive data areas, procedures, program contexts, and messages that may not exist in a program-only backup.
Replacement acceptance should confirm the complete restored memory image and all retained-data behavior before the controller returns to production.
Availability, condition, price, and shipping time for 1775-MED are confirmed during quotation.
Allen-Bradley 1775-MED 128K PLC-3 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.
- The official PLC-3 reference assigns 128K or 131,072 words to 1775-MED.
- The installed memory use should be measured before any lower-capacity alternative is considered.
- Large data areas, procedures, messages, and program contexts all contribute to required capacity.
- A program-only copy may not preserve every item stored in a large PLC-3 memory image.
- Procedures, symbols, messages, retained data, and the memory map should be included and verified.
- The backup identifier should be tied to the correct controller and machine revision.
- Confirm the MED catalog and processor-chassis position before installation.
- Restore the validated full application and examine memory and processor diagnostics.
- Prove all contexts, procedures, and retained-data behavior before production release.
- PLC-3 applications whose complete program and controller data require the 131,072-word capacity of 1775-MED
- Restoration projects that must preserve a verified high-capacity memory image together with its data tables, messages, procedures, and status records
- Capacity-controlled PLC-3 service where 1775-MED must be matched to the documented processor chassis and validated backup before startup