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HHR-21AHF2A1 (S9548FA) Battery Pack YOKOGAWA

HHR-21AHF2A1 (S9548FA) Battery Pack YOKOGAWA

The YOKOGAWA HHR-21AHF2A1 (S9548FA) operates as a dedicated power storage component, providing reliable backup energy for volatile memory and real-time clock (RTC) modules within Distributed Control Systems (DCS) and associated...

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SKU: HHR-21AHF2A1 (S9548FA)
Vendor: Yokogawa
Category: Battery Pack
Related Series:

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The YOKOGAWA HHR-21AHF2A1 (S9548FA) operates as a dedicated power storage component, providing reliable backup energy for volatile memory and real-time clock (RTC) modules within Distributed Control Systems (DCS) and associated industrial instrumentation platforms.

Hardware Specifications

Parameter Specification
Model HHR-21AHF2A1 (S9548FA)
Brand YOKOGAWA
Origin japan
Voltage 2.4 V
Capacity 1900 mAh
Chemistry Ni-MH (Nickel-Metal Hydride)
Cycle Life > 600 charge cycles

Industrial System Power Backup

The HHR-21AHF2A1 serves as a mission-critical component for maintaining system integrity during primary power losses. It is specifically engineered to provide the stable discharge characteristics required by DCS controller nodes to retain critical configuration data, process logs, and system time-keeping functionality. The robust chemistry supports high-reliability operation across extended deployment intervals, ensuring that the control system maintains essential state awareness during unexpected site-wide electrical interruptions.

Frequently Asked Questions (FAQ)

Q: What is the shelf life of this battery pack if stored as a spare?

A: Like all Ni-MH batteries, the HHR-21AHF2A1 will experience self-discharge over time. Store in a cool, dry environment (ideally 15°C to 25°C) and conduct periodic inspections. It is recommended to perform a maintenance charge if the battery has been in storage for an extended period.

Q: How do I know when the battery requires replacement?

A: The DCS engineering station will typically trigger a system alarm or status flag when the battery voltage drops below the operational threshold. Replace the battery pack immediately upon receiving a "Low Battery" warning to prevent the loss of volatile memory.

Field Installation Guidelines

  • Handling: Observe standard electrostatic discharge (ESD) precautions when handling the battery pack and connecting it to the controller assembly.
  • Replacement: Perform the battery replacement while the control station is powered (if the system architecture permits "hot-swapping" the battery backup module) to prevent data loss. Always refer to the specific controller’s maintenance manual for the correct sequence of operations.
  • Storage: Dispose of exhausted battery packs in accordance with local environmental and hazardous waste regulations. Do not incinerate or attempt to recharge non-rechargeable cells, and avoid short-circuiting the terminals.
  • Mounting: Ensure the battery connector is fully seated to prevent intermittent contact. Secure the battery pack in the designated chassis housing to protect it from mechanical vibration or shock during cabinet operation.