1756-ESMCAP Allen-Bradley Capacitor type energy storage module 5.1 VDC 330 mA

1756-ESMCAP Allen-Bradley Capacitor type energy storage module 5.1 VDC 330 mA

1.Overview of the 1756-ESMCAP Allen-Bradley

The 1756-ESMCAP is a capacitor-based Energy Storage Module (ESM) for the ControlLogix 5570/5580 series controllers from Allen-Bradley, a Rockwell Automation company. It replaces traditional lithium batteries, providing controller holdover energy during power outages and ensuring that programs and safety data are fully written to non-volatile memory (NVS), enabling a "battery-free" maintenance solution. As a key component of the Rockwell Automation Integrated Architecture system, the 1756-ESMCAP module enables engineers to build larger, more complex safety solutions without being limited by the standard memory on the controller motherboard.

Expanding Safety Memory Capacity

Benefits: Frees up valuable controller main memory for safety applications. This allows you to deploy more complex and feature-rich safety programs, including numerous safety interlocks, zone controls, safety recipes, and audit trail data, without worrying about running out of memory.

Optimized for Safety Applications

Benefits: This module is designed and tested for full compatibility with Allen-Bradley GuardLogix safety controllers. It ensures the integrity and reliability of safety programs and data in an extended memory environment, meeting stringent international safety standards (such as IEC 61508 and IEC 62061).

Seamless ControlLogix Integration

Benefits: As a module in the 1756 I/O frame, it easily installs in any available slot. High-speed, deterministic communication with the GuardLogix controller via the backplane reduces complex wiring and simplifies system configuration.

Non-Volatile Data Storage

Benefits: Even in the event of a system power outage, the safety program and associated data stored in the 1756-ESMCAP module are not lost. This ensures that the system can quickly and accurately recover to a known safe state after power is restored, improving equipment availability and safety.

Support for RSLogix 5000 / Studio 5000 Environments

Benefits: Users can easily manage and allocate safety projects to the extended memory module within the familiar Studio 5000 integrated development environment, just as they do with standard memory. This significantly reduces engineering complexity and the learning curve.

2.Core Features:

Model: 1756-ESMCAP
Applicable Controllers: 1756-L7x / L8x Series (5570/5580)
Energy Storage Method: Capacitor Array, No Battery
Operating Voltage: 5.1 V DC (Powered by the controller internally)
Current Consumption: 330 mA
Maximum Power Consumption: 13.3 W
WallClockTime: 12 days at 20°C, 10 days at 40°C, 7 days at 60°C
Charge Time: ≤2 minutes (20°C)
Operating Temperature: 0…60°C (32…140°F)
Storage Temperature: –40…85°C
Shock: 30 g (operating), 50 g (non-operating)
Vibration: 2 g (10…500 Hz)
Humidity: 5…95% RH, non-condensing
Dimensions (H×W×D): 74.9 mm × 127 mm × 182.1 mm mm (approximately 7.5 × 12.7 × 18.2 cm)
Weight: 0.15 kg
Occupancy: 0 slots, plugs directly into the dedicated socket on the back of the controller
Certifications: UL, CE, CSA, RoHS, CCC, ATEX/IECEx T4

Installation and Maintenance Tips
When powering on for the first time, wait until the CHRG light turns off to ensure the capacitor is fully charged.
Before disassembly, the controller's OK light must turn from green to red to completely off. Failure to do so may result in program loss.
The module is not field repairable. In the event of a failure, the entire module must be replaced and disposed of as electronic waste.

Typical Applications
Process control, packaging, pharmaceuticals, textiles, and other downtime-sensitive applications; Remote stations, offshore platforms, and cleanrooms where battery transportation is restricted or "zero maintenance" is required.
Combined with 5580 controllers such as the 1756-L81E, L83E, and L85E, this module can be used to implement redundant or standalone high-availability systems.

Program and Data Backup: The 1756-ESMCAP is a capacitor-based energy storage module. Its primary function is to provide temporary power to the 1756-L7x controller immediately after a chassis power outage or when the controller is removed from a powered chassis. This brief power supply is sufficient to securely save the controller's program and data to its onboard non-volatile memory, effectively preventing program loss.

Integrated Design: It's important to note that the ControlLogix 5570 (L7 series) controller does not include a battery; the 1756-ESMCAP module is a backup power solution included as standard.

3.Product details pictures

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