Specifications

4 ControlLogix™ Controller and Memory Board
Publication
1756-IN101H-EN-P - June 2003
Replace a Suspected Failed Controller
Catalog number of the memory board,
if one is installed
Catalog number of the controller
ControlLogix
1756-M…
CAT. NO./SERIES
ControlLogix
1756-L…
CAT. NO./SERIES
3. Match the catalog numbers of the
controllers and memory boards.
1. Cycle the power to the
chassis.
2. Make sure the OK LED is solid red.
If the OK LED is not solid red, the
controller does not require
replacement.
4. Install the battery.