PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1756-ESMCAP is a ControlLogix capacitor-based Energy Storage Module. It installs directly into ControlLogix L7 and GuardLogix L7 controllers in place of a battery. The module provides temporary power to write programs to nonvolatile storage memory during main power loss. It also includes an embedded real-time clock to maintain system time during operation. Additionally, it supports clearing application programs from controller nonvolatile memory when required.
This unit operates with a current draw of 330 mA at 5.1V DC. It features a maximum power dissipation rating of 13.3 watts. The open-type hardware supports standard installation in any chassis slot width of one. Operating temperatures span from 0 to 60 degrees Celsius with a 30g shock resistance rating. Status indicators display active charging until full capacitor reserves are established.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| UPC | 612598876082 |
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| Weight | 0.31 lbs (0.14 kg) |
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| Module Type | Energy Storage Module |
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| Current Draw | 330 milliamps at 5.1 Volts DC |
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| Enclosure | Open |
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| Operating Temperature | 32-140 Fahrenheit, 0-60 Celsius |
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| Power Dissipation (Max) | 13.3 Watts |
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| Location | Chassis (Any Slot) |
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| Slot Width | 1 |
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TECHNICAL INFORMATION
Features
- Replaces traditional lithium batteries in ControlLogix L7 and GuardLogix L7 controllers.
- Supplies backup power to write user memory to nonvolatile storage on power down.
- Embedded real-time clock keeps accurate controller time during standard execution.
- Visual indicators show real-time capacitor charging status during startup.
- Draws 330 mA at 5.1V DC with 13.3 watts maximum dissipation.
TECHNICAL INFORMATION
Applications
- ControlLogix L7 controller nonvolatile program memory retention during outages.
- GuardLogix L7 safety control systems requiring battery-free energy backup.
- Industrial control architectures operating in clean Overvoltage Category II environments.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module into the designated slot within compatible ControlLogix L7 series controllers.
- Allow the module to finish charging completely before removing power from the system.
- Do not remove the capacitor module immediately after chassis power shuts down.
- Operate only within clean industrial environments compliant with Overvoltage Category II.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley ControlLogix L7 controllers.
- Compatible with Allen-Bradley GuardLogix L7 safety controllers.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley ControlLogix L7 controllers. Compatible with Allen-Bradley GuardLogix L7 safety controllers.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the primary function of the Allen-Bradley 1756-ESMCAP?
It provides capacitor-based backup power to save controller memory to nonvolatile storage during power loss.
Which controller families support the 1756-ESMCAP module?
The module is designed for ControlLogix L7 and GuardLogix L7 series controllers.
Can the 1756-ESMCAP be removed immediately after shutting off power?
No, users must wait and allow the module to complete operations before removal.
How is the charging status of the 1756-ESMCAP monitored?
The module features dedicated ESM Charging and CHRG LED indicators to display active charging state.
