The 1756-M24 module is a ControlLogix5555 memory expansion module manufactured by Allen Bradley. It is part of the A-series and it has an open type of enclosure. Its memory specifications are 3.5 Megabytes, it is a nonvolatile type of memory module, and it can keep a copy of a project on the controller without needing to maintain power to the controller. It is intended for use with Allen Bradley ControlLogix5555 controllers in a ControlLogix chassis. After installing the 1756-M24 memory module, the LED indicator labeled “OK” shows the status of the memory module to ensure that it has been installed successfully. The Allen Bradley 1756-M24 memory module is compatible with multiple controllers and it can function with the battery module installed on the controller to preserve memory and storage data, provided that the controller is not removed from the chassis.
Before installing the 1756-M24 memory module, care must be taken to ensure that all the power connected to the controller is removed first. Attempting a replacement, removal, or installation of this module without disconnecting the battery and other power supplies can result in serious damage. Note that the operating temperature range of this module is from 0 to 60 degrees Celsius.
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| Manufacturer | Rockwell Automation |
| Brand | Allen Bradley |
| Part Number/Catalog No. | 1756-M24 |
| Series | ControlLogix |
| Module Type | Expansion Memory Module |