{"product_id":"hhr-21ahf2a1-yokogawa-dcs-battery-new-original-stock","title":"HHR-21AHF2A1 Yokogawa DCS Battery | New \u0026 Original Stock","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa HHR-21AHF2A1\u003c\/strong\u003e (\u003cstrong\u003eHHR-21AHF2A1\u003c\/strong\u003e) DCS Battery operates as a dedicated hardware component for volatile memory backup within Distributed Control System (DCS) controller modules.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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\u003eHHR-21AHF2A1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.12kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e45 mm x 20 mm x 5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e2.4 VDC (Nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e1100 mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eNickel-Metal Hydride (Ni-MH) Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe HHR-21AHF2A1 utilizes Ni-MH chemistry to maintain data retention during primary power loss scenarios. The 2.4 VDC nominal output is optimized for low-self-discharge performance to ensure long-term availability of control logic and configuration parameters in standby modes. The battery supports integration with controller charging circuits, providing consistent current draw and voltage regulation to prevent memory corruption or module initialization errors during power cycling.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Is this battery susceptible to memory effect during standard operational cycles?\u003c\/p\u003e\n\u003cp\u003eA: Ni-MH batteries generally exhibit minimal memory effect compared to older Ni-Cd variants; however, maintaining a stable charging environment within the controller module is required to ensure the specified 1100 mAh capacity is accessible throughout the lifecycle.\u003c\/p\u003e\n\u003cp\u003eQ: What is the primary function of this battery in a controller?\u003c\/p\u003e\n\u003cp\u003eA: It provides the necessary power to maintain volatile RAM contents, such as current process values and temporary setpoint configurations, when the system is disconnected from the main power bus.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInspect the battery terminal contacts for oxidation before insertion; ensure the polarity matches the controller header pinout exactly to prevent circuit board damage.\u003c\/li\u003e\n\u003cli\u003eInstall the battery in a climate-controlled cabinet environment to stay within the -20 deg C to 55 deg C operating range.\u003c\/li\u003e\n\u003cli\u003eHandle the unit by the edges to avoid applying mechanical pressure to the cells, which could lead to internal electrolyte leakage.\u003c\/li\u003e\n\u003cli\u003eReplace the unit according to the maintenance schedule specified in the controller's manual, as effective voltage retention drops over extended operational years.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":49203349618940,"sku":"HHR-21AHF2A1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/HHR-21AHF2A12.jpg?v=1781575137","url":"https:\/\/www.electronicplc.com\/ar\/products\/hhr-21ahf2a1-yokogawa-dcs-battery-new-original-stock","provider":"Electronic PLC","version":"1.0","type":"link"}