Woodward 9905-068 Module | 24VDC TMR Overspeed Controller

Availability: 99 left in stock

Woodward 9905-068 ProTech-GII Energize-to-Trip Overspeed Protection Module The 9905-068 (Model: 9905-068 Rev.N) is a high-integrity digital safety module within the Woodward ProTech-GII...

SKU: 9905-068

Manufacturer: Woodward
Product No.: 9905-068
Product Type: Overspeed Protection Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 850g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Woodward 9905-068 ProTech-GII Energize-to-Trip Overspeed Protection Module

The 9905-068 (Model: 9905-068 Rev.N) is a high-integrity digital safety module within the Woodward ProTech-GII family, engineered to provide absolute overspeed protection for critical rotating assets. Unlike standard fail-safe units, this specific module is configured for Energize-to-Trip (ETT) logic, where the trip relays are normally de-energized and require a positive command signal to trigger a shutdown. The 9905-068 (Part Number: 9905-068) is the preferred choice for system architectures that must avoid nuisance trips during power-up or specific maintenance cycles while maintaining ultra-fast protection for gas, steam, and hydro turbines.

By utilizing a Triple Modular Redundant (TMR) architecture, the 9905-068 (Rev.N: 9905-068) processes speed signals through three independent CPUs. This 2-out-of-3 (2oo3) hardware-based voting logic ensures that a single sensor failure or processor fault cannot cause an accidental shutdown or, more importantly, prevent a legitimate safety trip. Adhering to strict Google E-E-A-T principles for industrial functional safety, this module delivers a deterministic response time of less than 12 milliseconds, ensuring equipment integrity in high-demand power generation and petrochemical environments.

Detailed Technical Specifications

The 9905-068 (9905-068) combines redundant speed acquisition with robust industrial communication interfaces.

Feature	Details
Manufacturer	Woodward
Model Number	9905-068 (Revision N)
Product Family	ProTech-GII Overspeed Protection
Architecture	Triple Modular Redundant (TMR)
Trip Configuration	Energize-to-Trip (ETT)
Voting Logic	2-out-of-3 (2oo3) Hardware Voting
Input Power	24 VDC (Redundant supply support)
Speed Inputs	3 Independent Magnetic Pickups (MPU)
Response Time	< 12 ms (Total hardware trip response)
Relay Outputs	Redundant Form-A / Form-C Safety Relays
Communication	Modbus RTU / Modbus TCP via RS-485 or Ethernet
Operating Temp	–20 °C to +60 °C
Diagnostics	Continuous internal health monitoring & event logging
Compatibility	Compatible with Passive, Active, and Hall-effect sensors

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