Which controller supports 1757-BEM?

The Rockwell Automation catalog specifies the ProcessLogix 1757-PLX52 controller.

When is 1757-BEM recommended?

Use it where chassis power is interrupted frequently and user-configuration retention must be maintained.

What happens to 1757-PLXBAT when 1757-BEM is installed?

Remove the controller's 1757-PLXBAT internal battery as directed for the extension-module arrangement.

How should configuration be protected before installing 1757-BEM?

Create and verify an external archive of the 1757-PLX52 user configuration before disconnecting any backup source.

How is the rechargeable source in 1757-BEM checked?

Follow the ProcessLogix maintenance procedure to verify connection, charging condition and retention performance.

Can 1757-BEM be connected to an unrelated ControlLogix controller?

No. The documented host in the Rockwell Automation product information is 1757-PLX52.

How should 1757-BEM be commissioned?

Verify the controller starts with the intended configuration, then perform the approved controlled power-interruption test.

What maintenance record is needed for 1757-BEM?

Record installation date, controller identity, internal-battery removal, charge/retention result and configuration archive location.

1757-BEM

Name: 1757-BEM
Brand: Allen-Bradley
SKU: 1757-BEM

ProcessLogix Battery Extension Module

Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Describe：

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.

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Technical specifications for 1757-BEM

Manufacturer:

Allen-Bradley
Product Category:

PLC Systems
Spare Part Number:

1757-BEM
Estimated shipping dimensions:

3.5x14x14.5cm
Weight:

0.36 kg
Tariff Code:

8537101190
Counliy of origin:

USA
Module type:

Battery extension module
Supported controller:

1757-PLX52
Battery chemistry:

Rechargeable

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Information

Overview Manuals Common Applications Product Precautions

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 support

Extends configuration retention during rack power loss

1757-BEM Planned chassis-power shutdowns

Provides a rechargeable backup source for the supported controller

1757-BEM Interruption-prone control cabinets

Supports ProcessLogix installations with frequent supply interruptions

1757-BEM Controller configuration retention

Replaces 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.

Archive the controller configuration before any battery work.

Remove the controller's 1757-PLXBAT battery when the extension module is installed.

Verify the module connection and charge condition before relying on backup service.

Perform a controlled power-loss retention test under the plant procedure.

Commission 1757-BEM under controlled conditions and retain the completed functional-test record before release.

Technical notes

1757-BEM is intended for 1757-PLX52 installations where rack power is interrupted frequently. Preserve a verified configuration archive and confirm rechargeable-backup operation during commissioning.

FAQ View All FAQ

Which controller supports 1757-BEM?

The Rockwell Automation catalog specifies the ProcessLogix 1757-PLX52 controller.
When is 1757-BEM recommended?

Use it where chassis power is interrupted frequently and user-configuration retention must be maintained.
What happens to 1757-PLXBAT when 1757-BEM is installed?

Remove the controller's 1757-PLXBAT internal battery as directed for the extension-module arrangement.
How should configuration be protected before installing 1757-BEM?

Create and verify an external archive of the 1757-PLX52 user configuration before disconnecting any backup source.

How is the rechargeable source in 1757-BEM checked?

Follow the ProcessLogix maintenance procedure to verify connection, charging condition and retention performance.
Can 1757-BEM be connected to an unrelated ControlLogix controller?

No. The documented host in the Rockwell Automation product information is 1757-PLX52.
How should 1757-BEM be commissioned?

Verify the controller starts with the intended configuration, then perform the approved controlled power-interruption test.
What maintenance record is needed for 1757-BEM?

Record installation date, controller identity, internal-battery removal, charge/retention result and configuration archive location.

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