Description

1756-ESMCAP ControlLogix Capacitor Energy Storage Module Product Description

Technical Specifications

• Product Model: 1756-ESMCAP
• Brand: Allen‑Bradley (Rockwell Automation)
• Warranty: One Year
• Working Voltage: 5.1 VDC controller internal power bus
• Current Consumption: 330mA rated operating current, max power dissipation 13.3W
• Operating Temperature: 0°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Protection Class: IP20 (controller integrated installation)
• Energy Storage Type: Supercapacitor capacitor energy storage (battery-free design)
• Compatible Controllers: ControlLogix 5570 (L7 series) & GuardLogix L7 safety PLCs
• Installation Method: Direct plug-in lock on the side of L7 CPU module, field replaceable
• Built-in Function: Embedded real-time clock (RTC) power backup, CHRG charging indicator LED
• Dimensions: 120mm × 25mm × 85mm
• Net Weight: Approx 0.12kg

Product Overview

The 1756-ESMCAP is a capacitor-based energy backup module exclusively developed by Rockwell Automation for ControlLogix L7 and GuardLogix L7 series high-end PLC controllers. It replaces traditional lithium battery backup units to solve common industrial pain points such as battery aging, periodic replacement maintenance, chemical leakage risks, and short power hold-up time during brief power outages. Relying on supercapacitor rapid charge and discharge technology, this module supplies short-term reserve power to retain controller non-volatile memory programs, process fault logs and real-time clock timing data when main power is cut off or fluctuates sharply. It is widely used in petrochemical, power generation, heavy machinery and automated production lines that require high system data security and low maintenance frequency. As a standard original backup accessory for ControlLogix 5570 platform, it greatly improves the long-term running stability and data integrity of the core PLC control system.

Core Functional Features

1. Battery-Free Capacitor Energy Storage Design Adopts industrial supercapacitor energy storage instead of disposable batteries, eliminates regular battery replacement work, avoids electrolyte leakage and corrosion hidden dangers, supports tens of thousands of charge-discharge cycles with ultra-long service life.
2. Critical Data & RTC Continuous Backup Provides temporary power supply for controller non-volatile storage area after power failure, locks running programs, production recipe parameters and historical fault records; maintains the built-in real-time clock operation to ensure accurate system timestamp after power restoration.
3. Plug-and-Play Field Replaceable Structure Snap-on mounting on the side of L7 CPU without disassembling the entire rack, supports hot replacement under system power-on state; equipped with charging status LED indicator to visually display capacitor charging progress and working health.