{"product_id":"allen-bradley-1756-esmcapk-controllogix-energy-storage-module","title":"Allen-Bradley 1756-ESMCAPK ControlLogix Energy Storage Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-ESMCAPK ControlLogix Energy Storage Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-ESMCAPK\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-ESMCAPK Energy Storage Module\u003c\/strong\u003e, serves as the primary\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ecapacitor-based energy storage accessory\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eutilized to execute controller memory retention during power interruption events across ControlLogix 5570 platforms.\u003c\/p\u003e\n\u003cp\u003eConfigured for transient energy buffering in ControlLogix backplane-powered controller assemblies, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-ESMCAPK\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-ESMCAPK Energy Storage Module\u003c\/strong\u003e) provides direct electrical hold-up support for volatile memory preservation without reliance on replaceable battery elements.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1756: ControlLogix platform chassis family\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eESM: Energy Storage Module designation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCAPK: Capacitor Pack variant identifier for extended lifecycle energy buffering\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-ESMCAPK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponent Type\u003c\/td\u003e\n\u003ctd\u003eControlLogix energy storage accessory module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnergy Storage Method\u003c\/td\u003e\n\u003ctd\u003eCapacitor-based (battery-free design)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eControlLogix 5570 processors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eDirect controller plug-in, no external wiring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane Memory Retention and Firmware Interaction\u003c\/h3\u003e\n\u003cp\u003eWithin Allen-Bradley ControlLogix architectures, the 1756-ESMCAPK interfaces with controller power conditioning circuitry to stabilize short-duration voltage decay events on the backplane logic rail. The capacitor pack provides temporary energy injection to maintain volatile memory state integrity during supply interruption windows.\u003c\/p\u003e\n\u003cp\u003eBackplane interaction occurs at the controller power domain level, without participation in EtherNet\/IP or I\/O scan execution paths. Energy discharge is governed by internal controller power management logic tied to 5570 processor hardware timing.\u003c\/p\u003e\n\u003cp\u003eThe module aligns with industrial control system requirements for firmware-state preservation, ensuring deterministic retention of runtime variables during micro power loss conditions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1756-ESMCAPK require periodic replacement like battery modules?\u003cbr\u003eA: No. It uses capacitor-based storage and does not require scheduled replacement cycles.\u003c\/p\u003e\n\u003cp\u003eQ: Can the module be installed or removed under power?\u003cbr\u003eA: Installation is intended for powered-down chassis conditions. Hot-swap behavior depends on controller configuration and system state.\u003c\/p\u003e\n\u003cp\u003eQ: Does the module affect backplane communication speed or scan time?\u003cbr\u003eA: No. It operates in the power domain and does not participate in backplane data traffic.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInsert the module directly into the ControlLogix 1756 controller slot interface until full backplane connector engagement is confirmed.\u003c\/p\u003e\n\u003cp\u003eEnsure the controller chassis is properly grounded before installation to prevent transient discharge imbalance in the capacitor pack. Maintain correct seating alignment to avoid mechanical stress on the edge connector.\u003c\/p\u003e\n\u003cp\u003eAvoid contamination of the connector interface and ensure enclosure airflow remains within specified 0 to 60 deg C operating limits. Do not apply external wiring or auxiliary connections, as the module operates solely through backplane integration.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43585674936410,"sku":"1756-ESMCAPK","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-ESMCAP1.jpg?v=1783058922","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-esmcapk-controllogix-energy-storage-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}