- 750 KB data and logic memory paired with 750 KB nonvolatile memory
- Different project-retention identity from the volatile-memory 1756-L55M12
- Listed in the documented ControlLogix Revision 11 redundancy scope
1756-L55M22 is a ControlLogix 5555 controller with matched 750 KB working and nonvolatile memory allocations.
The onboard nonvolatile memory supports project storage and recovery but does not replace a controlled external project archive.
Verify Series A identity, stored-image status, firmware, battery, and Revision 11 redundancy compatibility before replacement.
Availability, condition, price, and shipping time for 1756-L55M22 are confirmed during quotation.
Allen-Bradley 1756-L55M22 ControlLogix 5555 Controller 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.
- 750 KB working memory is paired with 750 KB nonvolatile memory
- The stored project must be checked for revision and load behavior
- An external controlled project archive remains required
- 1756-L55M22 is listed in the documented Revision 11 redundancy scope
- The partner controller and redundancy modules must use approved revisions
- Verify synchronization and stored-project behavior before production
- 1756-BA1 is the documented controller battery
- 1756-CP3 or 1747-CP3 supports the local serial programming connection
- Communication networks require separate compatible ControlLogix modules
- ControlLogix 5555 applications requiring matched working and nonvolatile project memory
- Revision 11 redundant controller systems using the approved hardware combination
- Chassis-based machine and process-control systems with separate network modules