Yokogawa HHR-11F2A1 Nickel-Metal Hydride Backup Battery

Yokogawa HHR-11F2A1 Nickel-Metal Hydride Backup Battery

The Yokogawa HHR-11F2A1, also cataloged as the HHR-11F2A1 Ni-MH backup battery, operates as a dedicated memory retention supply for CPU RAM, RTC circuits, and configuration data within Yokogawa CS1000, CS-3000, and S9129FA controller systems.

Hardware Specifications

Gap Voltage Validation (-10 VDC Targets)

In Yokogawa DCS systems, backup batteries are validated against gap voltage thresholds to ensure proper retention of volatile memory. The HHR-11F2A1 maintains stable discharge characteristics, preventing voltage sag below critical RTC and RAM retention levels. This design minimizes cross-talk between adjacent circuits and ensures predictable rotor dynamics in turbine supervisory interfaces when integrated with Yokogawa controllers.

Frequently Asked Questions

Q: Can the HHR-11F2A1 be replaced with higher-capacity Ni-MH cells? A: Yes, many replacement packs use 1500 mAh cells to extend retention duration, provided connector and dimensions remain identical.

Q: What is the primary function of this battery in Yokogawa systems? A: It supplies backup power to CPU RAM, RTC, and configuration registers during power loss.

Q: Is hot-swap supported for this battery? A: No, replacement must be performed during controlled shutdown to avoid data loss.

Field Installation Guidelines

• Disconnect system power before replacing the battery to prevent volatile memory corruption.
• Ensure keyed connector orientation matches the designated motherboard socket.
• Secure harness routing to avoid mechanical stress or vibration-induced disconnection.
• Maintain ambient conditions within standard industrial ranges; avoid condensation.
• Dispose of Ni-MH cells according to hazardous waste regulations.