Product Overview
The Woodward 9905-972 is a high-precision 6-channel LinkNet module engineered for speed sensing and overspeed protection. It interfaces with dual magnetic pickups (VRS) to monitor rotational speeds up to 50,000 RPM. This critical safety module provides fast response times for SIL 3-rated protection loops, ensuring safe turbine and engine operation.
Technical Specifications
| Attribute | Details |
|---|---|
| Model Number | 9905-972 |
| Condition | 100% Brand New and Original |
| Speed Range | 100 to 50,000 RPM |
| Accuracy | ±0.02% of reading |
| Response Time | < 3ms (at overspeed conditions) |
| Input Types | Dual Magnetic / Variable Reluctance Sensors (VRS) |
| Output Signals | 4-20 mA, RS-485 Modbus |
| Operating Temperature | -55°C to +85°C |
| Weight | 0.44 kg |
Engineering Advantages
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SIL 3 Safety Compliance: Meets IEC 61508 SIL 3 standards for functional safety, enabling integration into high-demand ESD and overspeed protection architectures.
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Ultra-Fast Transient Response: Detects overspeed conditions and triggers a response in under 3 milliseconds, preventing mechanical failure during sudden load rejections.
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Extreme Precision: ±0.02% accuracy ensures perfect speed monitoring, avoiding false trips and maintaining tight control during grid synchronization.
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Wide-Range Thermal Stability: Operates in extreme environments from -55°C to +85°C, suitable for high-temperature engine skids or unheated cabinets.
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Dual-Input Redundancy: Accepts dual magnetic pickups for cross-checking speed data, ensuring safety even with a sensor failure.
FAQs
Is this Woodward 9905-972 module a brand new unit?
Yes, we supply only 100% brand new and original Woodward 9905-972 modules in factory-sealed packaging, ensuring full compliance with safety certifications.
Does the module require a specific software tool for RPM calibration?
Woodward’s PC-based service tools or the RS-485 Modbus interface are used for configuring speed ranges and trip setpoints, ensuring compatibility with the turbine’s gear tooth count.
Can the 9905-972 replace older LinkNet speed modules?
Yes, it is an advanced SIL 3 rated replacement for legacy LinkNet speed modules. Ensure compatibility with your system’s CPU by referring to the hardware manual.
What type of cabling does Woodward recommend for the VRS inputs?
For best performance, use shielded twisted-pair cabling to minimize interference and maintain the module’s < 3ms response time and ±0.02% accuracy.
| 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. |
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