{"product_id":"yokogawa-hhr-21ahf2a1-backup-battery-for-dcs-systems","title":"Yokogawa HHR-21AHF2A1 Backup Battery for DCS Systems","description":"\u003ch2\u003eTechnical Overview\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHHR-21AHF2A1\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-reliability\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNickel-Metal Hydride (Ni-MH) backup battery assembly\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edesigned for Yokogawa\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDistributed Control Systems (DCS)\u003c\/strong\u003e. It provides\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ememory retention and real-time clock backup\u003c\/strong\u003e, ensuring configuration data and event logs are preserved during primary power loss.\u003c\/p\u003e\n\u003cp\u003eEngineered for long service life and thermal stability, this battery is a critical preventive-maintenance component for maintaining system availability in industrial control environments.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eDetailed Specifications\u003c\/h2\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Chemistry\u003c\/td\u003e\n\u003ctd\u003eNickel-Metal Hydride (Ni-MH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Designation\u003c\/td\u003e\n\u003ctd\u003eHHR-21AHF2A1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e2.4 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Capacity\u003c\/td\u003e\n\u003ctd\u003e1100 mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Configuration\u003c\/td\u003e\n\u003ctd\u003e2 cells in series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e−20 °C to +55 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L × W × T)\u003c\/td\u003e\n\u003ctd\u003e45 × 20 × 11 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e0.2kg\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eApplication\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eMemory backup for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCPU modules\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReal-time clock retention in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ecommunication and control units\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eYokogawa\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCENTUM series\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand related DCS hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSystems requiring safe, continuous trickle-charge backup power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eMaintenance \u0026amp; Operational Notes\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eRecommended replacement as part of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003epreventive maintenance schedules\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEliminates data loss and\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebattery-low alarms\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eafter power interruptions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNi-MH chemistry avoids memory effect seen in older Ni-Cd batteries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact form factor supports installation in high-density electronic modules\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan the HHR-21AHF2A1 be replaced while the system is running?\u003c\/strong\u003e\u003cbr\u003eIn most Yokogawa CPU modules,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebattery replacement is supported while powered\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(hot-swap). Always verify with the specific module manual before replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is Ni-MH used instead of lithium batteries?\u003c\/strong\u003e\u003cbr\u003eNi-MH batteries offer a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003estable discharge profile\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand are safer for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003econtinuous trickle charging\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einside enclosed control modules compared to many lithium chemistries.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs pre-charging required before installation?\u003c\/strong\u003e\u003cbr\u003eNo. The battery may ship partially charged, but the module’s internal charging circuit will automatically charge it to full capacity after installation.\u003c\/p\u003e","brand":"YOKOGAWA","offers":[{"title":"Default Title","offer_id":51775498715448,"sku":"HHR-21AHF2A1","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/HHR-21AHF2A12.jpg?v=1770774574","url":"https:\/\/www.automodulexpert.com\/products\/yokogawa-hhr-21ahf2a1-backup-battery-for-dcs-systems","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}