Allen-Bradley 1757-BEM is a rechargeable battery extension module for the ProcessLogix 1757-PLX52 controller. It maintains the controller user configuration during repeated chassis-power interruptions.
- Extends configuration retention during rack power loss
- Provides a rechargeable backup source for the supported controller
- Supports ProcessLogix installations with frequent supply interruptions
- Replaces reliance on the controller's internal disposable backup battery
1757-BEM operates with 1757-PLX52 controller, ProcessLogix chassis, module interconnect, controller configuration backup.
Typical engineered duties include ProcessLogix 1757-PLX52 controller support, Planned chassis-power shutdowns, Interruption-prone control cabinets, Controller configuration retention.
Important Notice: Use 1757-BEM only with the supported 1757-PLX52 arrangement and remove the 1757-PLXBAT internal controller battery as directed before commissioning the extension module.
Apter Power 1757-BEM Manuals and Guides
Important Notice: The first document is an Apter Power 1757-BEM model-specific technical reference. The second is a distinct document for installation, configuration or system engineering.
1757-BEM ProcessLogix 1757-PLX52 controller supportExtends configuration retention during rack power loss
1757-BEM Planned chassis-power shutdownsProvides a rechargeable backup source for the supported controller
1757-BEM Interruption-prone control cabinetsSupports ProcessLogix installations with frequent supply interruptions
1757-BEM Controller configuration retentionReplaces reliance on the controller's internal disposable backup battery
Read the applicable Allen-Bradley installation instructions before work. Verify 1757-BEM and the installed-system configuration.
1Archive the controller configuration before any battery work.
2Remove the controller's 1757-PLXBAT battery when the extension module is installed.
3Verify the module connection and charge condition before relying on backup service.
4Perform a controlled power-loss retention test under the plant procedure.
5Commission 1757-BEM under controlled conditions and retain the completed functional-test record before release.
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