Technical Overview
The HHR-21AHF2A1 is a high-reliability Nickel-Metal Hydride (Ni-MH) backup battery assembly designed for Yokogawa Distributed Control Systems (DCS). It provides memory retention and real-time clock backup, ensuring configuration data and event logs are preserved during primary power loss.
Engineered for long service life and thermal stability, this battery is a critical preventive-maintenance component for maintaining system availability in industrial control environments.
Detailed Specifications
| Item | Specification |
|---|---|
| Battery Chemistry | Nickel-Metal Hydride (Ni-MH) |
| Model Designation | HHR-21AHF2A1 |
| Nominal Voltage | 2.4 V |
| Rated Capacity | 1100 mAh |
| Cell Configuration | 2 cells in series |
| Operating Temperature | −20 °C to +55 °C |
| Dimensions (L × W × T) | 45 × 20 × 11 mm |
| Net Weight | 0.2kg |
Application
-
Memory backup for CPU modules
-
Real-time clock retention in communication and control units
-
Yokogawa CENTUM series and related DCS hardware
-
Systems requiring safe, continuous trickle-charge backup power
Maintenance & Operational Notes
-
Recommended replacement as part of preventive maintenance schedules
-
Eliminates data loss and battery-low alarms after power interruptions
-
Ni-MH chemistry avoids memory effect seen in older Ni-Cd batteries
-
Compact form factor supports installation in high-density electronic modules
Technical FAQ
Can the HHR-21AHF2A1 be replaced while the system is running?
In most Yokogawa CPU modules, battery replacement is supported while powered (hot-swap). Always verify with the specific module manual before replacement.
Why is Ni-MH used instead of lithium batteries?
Ni-MH batteries offer a stable discharge profile and are safer for continuous trickle charging inside enclosed control modules compared to many lithium chemistries.
Is pre-charging required before installation?
No. The battery may ship partially charged, but the module’s internal charging circuit will automatically charge it to full capacity after installation.
| Quick Quotes | Receive price & availability FAST from our dedicated customer service team. |
|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
| Payment | We accept American Express, Discover, MasterCard, PayPal, and Visa. Our site is secured by RapidSSL. |
| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
| A: You can reach out to us via email, WhatsApp, WeChat, Skype, or your preferred communication platform. Contact us with your needs, and we'll provide a prompt, customized quote. |
Recently Viewed
Express Shipping
Extensive Inventory
Quality Assurance
