The 8271-929 from Woodward is a dedicated MPU High Signal Selector designed for redundant speed sensing systems. It continuously compares multiple magnetic pickup signals and outputs the highest valid frequency signal. Therefore, the module improves speed measurement reliability in engines, turbines, and generator control systems. Moreover, Woodward designed this selector to operate consistently under vibration, temperature variation, and electrical noise.
Technical Specifications
Category
Specification
Manufacturer
Woodward
Product Model
8271-929
Product Type
MPU High Signal Selector
Series
8271 Signal Conditioning Series
Function
Selects highest valid MPU frequency signal
Input Signal Type
Magnetic Pickup (MPU)
Number of Inputs
2 independent MPU inputs
Input Signal Form
Variable frequency AC sine wave
Input Frequency Range
50 Hz to 10,000 Hz
Minimum Input Voltage
≥ 1.0 Vrms (typical MPU signal)
Maximum Input Voltage
≤ 50 Vrms
Input Impedance
High impedance, MPU compatible
Output Signal Type
MPU frequency output
Output Selection Logic
Highest valid frequency comparison
Output Signal Form
AC frequency signal
Signal Response Time
< 5 ms
Supply Voltage Range
18–32 VDC
Nominal Supply Voltage
24 VDC
Power Consumption
< 5 W
Internal Energy Storage
Yes, for voltage stabilization
Electrical Isolation
Functional isolation between channels
Noise Immunity
High, suitable for industrial environments
Operating Temperature
-40 °C to +70 °C
Storage Temperature
-55 °C to +85 °C
Humidity
Up to 95%, non-condensing
Vibration Resistance
Designed for engine and turbine environments
Mounting Method
Panel mount or DIN rail
Enclosure Type
Industrial sealed housing
Terminal Type
Screw terminals
Wiring Access
Front-access terminals
Approximate Weight
0.6 kg (1.32 lb)
Typical System Role
Redundant speed signal conditioning
Compatible Systems
Woodward speed controls and ESD systems
FAQ
Q1: What is the main function of the 8271-929 MPU High Signal Selector? A1:8271-929compares two MPU speed signals in real time and outputs the highest valid frequency for reliable control decisions.
Q2: Which input signals does the 8271-929 support in speed control systems? A2:8271-929supports dual magnetic pickup inputs with AC sine wave signals across a wide industrial frequency range.
Q3: How does the 8271-929 improve system reliability in critical applications? A3:8271-929ensures redundancy by preventing signal loss, therefore maintaining stable speed feedback during sensor degradation scenarios.
Q4: Is the 8271-929 compatible with Woodward governors and ESD systems? A4:8271-929integrates seamlessly with Woodward speed controls, load sharing modules, and emergency shutdown systems.
Q5: What is the delivery and logistics policy for the 8271-929 module? A5:8271-929is brand new and original, in stock, and ships within 3 days to 2 weeks via DHL or equivalent logistics.
Installation Notes
Install within Woodward control racks or cabinets
Connect directly to magnetic pickup sensors near turbine or engine shafts
Use proper wiring and shielding to prevent electrical noise interference
Calibration and verification of MPU signals may be required during commissioning
Answer 1: PLC DCS Pro Ltd. collaborates with over 50 countries worldwide. As a leading supplier in China, we can provide significant discounts to customers based on market demand.
Question 2: What Is The Warranty Period?
Answer 2: We offer a standard one-year warranty for all new and original items.
Question 3: What Payment Methods Do We Accept?
Answer 3: We accept 100% T/T (Telegraphic Transfer) before shipping. For items with a lead time, a 30% deposit is required in advance, with the remaining 70% balance due before shipping. If you have an agent in China, please contact us for RMB transfer.
Question 4: What Shipping Methods Do We Use?
Answer 4: We primarily utilize carriers such as FedEx, DHL, UPS, BRE, etc. If you have an account with any of these carriers, you can arrange the shipping yourself. Additionally, we offer free shipping to China freight forwarders.
Question 5: What Is Our Delivery Time?
Answer 5: Typically, delivery takes around 1-3 days after receiving the advance payment. For items with a quoted lead time, delivery will occur as per the specified lead time.
Question 6: How Do We Package The Goods?
Answer 6: Our packaging process involves multiple layers of protection. Initially, the product is placed in its original box, sealed with a label. Then, we add a layer of bubble wrap to safeguard against collisions during transportation. Finally, all products are securely packed in sturdy boxes for further protection.
Question 7: How Can Customers Contact Us And Request A Quote?
Answer 7: Customers can inquire via email, WhatsApp, WeChat, Skype, or any preferred communication platform. Simply reach out to us, and we'll promptly provide a quote tailored to your needs.
Warranty Conditions
At PLC DCS Pro Ltd., we are committed to ensuring the quality of our products. Our one-year warranty provides coverage for any defects in material or workmanship, excluding damages caused by deliberate misuse.
🛡️Coverage Details:
This warranty encompasses all instances of product malfunction or failure due to inherent manufacturing flaws, with the exception of intentional damage.
📝Claim Process:
To avail of warranty services, please notify us of any quality-related issues within the warranty period. We may conduct online troubleshooting and examination as needed.
🚚Shipping Assistance:
We understand the importance of prompt service. Therefore, we cover return shipping costs for warranty-related returns within the first month of supply. Within three months of supply, we cover one-way shipping costs for warranty-related returns. After three months, the customer is responsible for shipping costs both ways.
🚫Exclusions:
Unauthorized modifications, repairs, or misuse of the product.
