1757-BEM
1757-BEM
1757-BEM
1757-BEM
1757-BEM
1757-BEM
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1757-BEM

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Allen-Bradley 1757-BEM is a ProcessLogix battery extension module that supports extended controller memory backup in compatible chassis configurations.
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Technical specifications for 1757-BEM

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1757-BEM
  • Product Family:
    ControlLogix
  • Product Type:
    ProcessLogix Battery Extension Module
  • Stock:
    1
  • Chassis Type:
    Standard ICP backplane
  • Backplane Current at 5.1 V DC:
    112 mA
  • Backplane Current at 24 V DC:
    36 mA
  • Backplane Power:
    1.424 W
  • Thermal Dissipation:
    9.6 W
  • Battery Construction:
    Three series-connected sub-C nickel-cadmium cells
  • Battery Output:
    3.6 V DC at 5 mA
  • Maximum Backup Interval:
    Up to 240 hours under the documented load condition
  • Battery-Presence Test Interval:
    Every 8.5 seconds
  • Battery-Load Test Interval:
    Every 73 minutes
  • Relay Contact Rating:
    30 V DC maximum, 100 mA maximum
  • Operating Temperature:
    0 to 60°C
  • Storage Temperature:
    −40 to 85°C
  • Relative Humidity:
    5% to 95%, non-condensing
  • Dimensions:
    3.5 × 14 × 14.5 cm
  • Weight:
    0.36 kg
  • Tariff Code:
    8538900000
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Backup Monitoring Installation Application
  • Extends backup support for a compatible ProcessLogix controller arrangement
  • Works with the documented battery, cable, connector, and chassis configuration
  • Requires maintained diagnostics and battery-service records

1757-BEM is an Allen-Bradley ProcessLogix battery extension module for supported controller and chassis configurations.

The module supports extended memory-backup operation through the documented battery connection and monitoring functions.

Before replacement, preserve the controller project and verify the chassis, module location, battery, cable, connector, polarity, and diagnostic history.

Availability, condition, price, and shipping time for 1757-BEM are confirmed during quotation.

Allen-Bradley 1757-BEM ProcessLogix Battery Extension Module 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.

  • Use the 1757-BEM with a ProcessLogix 1757-PLX52 only when power to the chassis is frequently interrupted.
  • Remove the 1757-PLXBAT controller battery whenever the 1757-BEM is installed.
  • The rechargeable 1757-BEM maintains the 1757-PLX52 user configuration during a rack-power failure.
  • Review battery-presence and battery-load test indications during maintenance
  • Investigate cable, connector, polarity, and battery condition before replacing electronics
  • Record diagnostic history and battery service dates for future troubleshooting
  • Confirm chassis support, module location, backplane power, and connector orientation
  • Inspect cable condition and polarity before reconnecting the battery extension
  • Follow the approved shutdown, electrostatic-discharge, and commissioning procedure
  • ProcessLogix controller installations requiring extended memory-backup support
  • Industrial process systems maintaining controller data during planned power interruption
  • Supported ProcessLogix chassis where battery monitoring and extension are documented
Description
1757-BEM is an Allen-Bradley ProcessLogix battery extension module for supported controller and chassis configurations.

The module extends the available controller memory-backup interval and provides the documented battery connection, loading, monitoring, and status functions used by the ProcessLogix system.

Before installation or replacement, confirm the supported controller arrangement, module location, battery condition, connector and cable condition, polarity, chassis power requirements, and applicable diagnostic indications.
Alternative Names
1757-BEM 1757 BEM 1757BEM Allen-Bradley 1757-BEM Rockwell Automation 1757-BEM ProcessLogix 1757-BEM
Technical notes
1757-BEM installation or replacement requires confirming the ProcessLogix controller, chassis slot, module series, battery cable, connector polarity, and backplane power; incompatible hardware or wiring can prevent correct operation.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Is Allen-Bradley 1757-BEM a replacement for the ProcessLogix controller battery or chassis power supply?
No. Allen-Bradley 1757-BEM is a battery extension module used with a supported ProcessLogix configuration. It does not replace the controller, chassis power supply, or the need to verify the installed battery arrangement.
What compatibility checks are required before ordering Allen-Bradley 1757-BEM?
Confirm the controller model, chassis type, supported module location, battery-extension connection, cable and connector arrangement, available backplane power, and the complete existing module label.
Can Allen-Bradley 1757-BEM be connected or removed while ignoring stored process data?
No. Follow the approved shutdown and backup procedure, preserve the controller project and data, isolate power as required, and account for the effect of disconnecting the backup source.
What should be checked when Allen-Bradley 1757-BEM does not provide the expected backup support?
Check battery condition, connector seating, cable continuity, polarity, module status, controller compatibility, chassis power, and the documented battery-load test results before replacing the module.
Does Allen-Bradley 1757-BEM remove the need for regular battery maintenance?
No. Maintain battery inspection and replacement records, review diagnostic indications, and follow the applicable ProcessLogix maintenance schedule.
What should be retained before replacing Allen-Bradley 1757-BEM?
Retain the controller project, chassis and slot record, battery and cable details, connector photographs, module status, diagnostic history, and approved maintenance procedure.
Can a visually similar battery module replace Allen-Bradley 1757-BEM?
No. Match the complete catalog number, chassis interface, electrical arrangement, connector and cable, battery design, mounting, and documented ProcessLogix compatibility.

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