9903-543 Woodward Overspeed Protection

9903-543 Woodward Overspeed Protection | New & Original Stock

Availability: 99 left in stock

Woodward 9903-543 ProTech-GII Overspeed Protection System The Woodward 9903-543, also cataloged as the 9903-543 Overspeed Protection Panel, operates as a...

SKU: 9903-543

Manufacturer: Woodward
Product No.: 9903-543
Product Type: Overspeed Protection Panels
Product Origin: USA
Payment:T/T, Western Union
Weight: 7000g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Woodward 9903-543 ProTech-GII Overspeed Protection System

The Woodward 9903-543, also cataloged as the 9903-543 Overspeed Protection Panel, operates as a dedicated hardware component for fail-safe speed monitoring and emergency shutdown execution within ProTech-GII safety platforms.

Hardware Specifications

Parameter	Specification
Model	9903-543
Brand	Woodward
Origin	USA
Weight	7.0 kg (15.4 lbs)
Dimensions	482 mm x 310 mm x 143 mm
Operating Temp	-20 to +60 deg C
Power Consumption	Sourced via dual redundant 18-32 VDC supply rails
Trip Logic Configuration	Energize-to-Trip (ETT)
Voting Architecture	Triple Modular Redundant (TMR) 2oo3 voting loop
Speed Sensing Inputs	3 x Independent Magnetic Pickups (Passive or Active MPU)
Input Frequency Range	0.5 Hz to 30000 Hz
Response Latency Time	< 12 ms typical
Relay Output Clusters	3 x Independent Trip Relays (Redundant Form-A/C contacts)
Analog Output Signals	Configurable 4-20 mA current loops for speed readout
Digital Communications	Modbus RTU (RS-485) and Modbus TCP (Ethernet)

High-Reliability Safety Control (SIS) Properties

The protection panel is built on a Triple Modular Redundant (TMR) 2oo3 architecture that uses three separate internal microprocessors to monitor three independent speed sensing pickups. To enforce complete fail-safe state execution without risk of false production outages, the safety circuitry processes sensor calculations using hardwired voting logic. Under this Energize-to-Trip configuration, internal trip relays stay de-energized during normal operation and require a positive power injection to execute a turbine shutdown command, preventing nuisance trips if control power drops out. Complete galvanic isolation separates each microprocessor module, maintaining data protection across backplane bus communication paths and ensuring response latencies stay under 12 ms during real-time overspeed events.

Frequently Asked Questions

Q: How does the internal self-test check the integrity of the trip relays without causing a machinery shutdown? A: The TMR 2oo3 architecture permits online testing of individual relay channels one at a time. The firmware injects a brief test signal to verify contact continuity and mechanical movement on a single relay while the remaining two channels remain armed to handle active emergency shutdown protection.

Q: What are the specific power supply constraints for the dual 18-32 VDC input terminals? A: The module contains internal diode-or'd power isolation blocks. This design enables two separate, independent VDC sources to run in parallel, ensuring that if one supply line drops out completely, the safety logic switches power feeds immediately without disturbing speed monitoring loops.

Q: Can passive and active magnetic pickups (MPUs) be combined across the three input channels? A: The input signal conditioning circuits are designed to handle both active and passive MPU signal types. However, to ensure balanced input thresholds and uniform wave-shape tracking across the 2oo3 voting engine, all three speed input slots should use identical sensor hardware configurations.

Field Installation Guidelines

MPU Sensor Lead Routing and Shielding: Route all three magnetic pickup sensor cables through dedicated, grounded steel conduits. Use independent twisted, fully shielded wiring pairs for each input channel, and terminate the drain shields exclusively at the chassis ground block to prevent signal cross-talk from corrupting the speed calculation logs.
Energize-to-Trip Power Loop Integrity: Because this hardware utilizes an Energize-to-Trip (ETT) layout, the shutdown circuit relies on a stable external power feed to trip the machine safety valves. Wire the trip relay circuits directly to an uninterruptible power source (UPS) to guarantee available power during a critical trip event.
Chassis Ground Resistance Target: Bolt the ruggedized metal housing securely into the panel frame using star washers to bite through paint barriers. Confirm that the total structural grounding path resistance from the chassis grounding lug to the main master station ground bus measures 10 Ohm or less.

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.