9905-463 Woodward | ProTech-GII De-Energize-to-Trip Safety Unit

Availability: 99 left in stock

Woodward 9905-463 ProTech-GII TMR Digital Overspeed Protection Module The 9905-463 (Model: 9905-463) is a high-integrity safety instrument designed for the absolute protection...

SKU: 9905-463

Manufacturer: Woodward
Product No.: 9905-463
Product Type: Overspeed Protection Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 1590g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Woodward 9905-463 ProTech-GII TMR Digital Overspeed Protection Module

The 9905-463 (Model: 9905-463) is a high-integrity safety instrument designed for the absolute protection of critical rotating machinery. As a core component of the Woodward ProTech-GII series, this module provides independent, ultra-high-speed overspeed detection for gas, steam, and hydro turbines. The 9905-463 (Part Number: 9905-463) is architected with Triple Modular Redundancy (TMR), utilizing three completely independent CPUs and speed signal paths to eliminate single points of failure.

This specific version is configured for De-Energize-to-Trip (DET) operation. In this fail-safe mode, the internal safety relays remain energized during normal turbine operation. Should the system detect an overspeed condition, a hardware fault, or a total loss of control power, the relays instantly de-energize to trigger an emergency shutdown. With a deterministic hardware-based response time of less than 12 milliseconds, the 9905-463 (9905-463) ensures compliance with the most stringent industrial safety standards in power generation and petrochemical sectors.

Detailed Technical Specifications

The 9905-463 (Part Number: 9905-463) integrates redundant speed sensing with high-resolution digital logic.

Parameter	Specification
Manufacturer	Woodward
Model Number	9905-463
Series	ProTech-GII Overspeed Protection
Architecture	Triple Modular Redundant (TMR)
Voting Logic	2-out-of-3 (2oo3) Hardware-based Voting
Trip Configuration	De-Energize-to-Trip (DET) / Fail-Safe
Response Time	< 12 ms (Total response from detection to relay)
Input Power	24 VDC (Redundant inputs supported)
Speed Inputs	3 Independent Magnetic Pickups (MPUs)
Relay Outputs	Redundant Form-A / Form-C Safety Relays
Communication	Modbus RTU (RS-485) / Modbus TCP (Ethernet)
Operating Temp	–20 °C to +60 °C
Protection Rating	IP20 (Industrial Metal Enclosure)
Weight	1.59 kg (3.5 lbs)

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.