- Match 1756-L55M14 to its documented Series A ControlLogix 5555 hardware configuration
- Confirm the controller firmware is compatible with the installed RSLogix 5000 software
- Preserve the controller project and verify the memory board, battery, chassis, and serial connection before replacement
1756-L55M14 is an Allen-Bradley Series A ControlLogix 5555 controller supplied as a documented controller-and-memory-board catalog configuration.
The 1756-L55M14 configuration must be matched by exact catalog number, installed Series, controller firmware, memory allocation, and RSLogix 5000 compatibility. Chassis fit alone does not establish interchangeability with another ControlLogix 5555 controller.
Before servicing 1756-L55M14, retain the complete controller project and record the installed firmware, memory-board configuration, 1756-BA1 battery condition, chassis power, communication modules, and serial programming connection.
Availability, condition, price, and shipping time for 1756-L55M14 are confirmed during quotation.
Allen-Bradley 1756-L55M14 ControlLogix Controller Manuals, Product Family, 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.
- 3.5 MB is available for controller data and logic
- 208 KB is reserved for I/O data
- The M14 table does not list onboard nonvolatile memory
- Maintain a verified external copy of the complete controller project
- Record firmware and communication-module configuration with the archive
- Confirm 1756-BA1 battery condition before removing power
- Install the open-style controller in a suitable industrial enclosure
- Check the loaded chassis against the 1.25 A demand at 5.1 V DC
- Apply the documented pollution-degree, overvoltage-category, and altitude limits
- ControlLogix 5555 machine-control projects requiring up to 3.5 MB of data and logic memory
- Chassis-based process and sequential-control systems using ControlLogix I/O
- Supported redundant-controller installations using the approved firmware combination