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5437-406 - 4-channel Speed Sensor Module is available in stock which ships the same day.
5437-406 - 4-channel Speed Sensor Module comes in UNUSED as well as REBUILT condition.
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SPECIFICATIONS:
Part Number: 5437-406
Manufacturer: Woodward
Series: MicroNet / MicroNet TMR
Product Type: Speed Sensor Module
Channels: Four (4) High-Speed Channels
Sensor Compatibility: Magnetic Pickup (MPU) / Proximity Probe
Input Frequency Range: 1 Hz to 25,000 Hz
Accuracy: 0.01% of specified frequency
Resolution: 18-bit Analog-to-Digital Conversion
Isolation: 500 V ac (Channel-to-Chassis)
Operating Temperature: -30 °C to +65 °C (-22 °F to +149 °F)
Availability: In Stock
Country of Origin: USA
FUNCTIONAL DESCRIPTION:
The 5437-406 is a 4-channel Speed Sensor Module specifically designed and manufactured for the Woodward MicroNet TMR (Triple Modular Redundant) platform. This module serves as the primary speed-sensing interface for mission-critical turbine applications where system availability and fault tolerance are paramount. By processing high-frequency pulses from magnetic pickups or proximity probes, the 5437-406 provides the central control logic with the sub-millisecond precision required for speed governing, overspeed protection, and acceleration limiting.
TMR FAULT TOLERANCE & VOTING:
As a native TMR component, the TMR Speed Sensor Module is designed to operate within a triplicated architecture. Each of the three redundant control processors (R, S, and T) receives independent speed data through the module's specialized fan-out circuitry. This configuration allows the system to:
Vote Out Faults: If one sensor or internal channel provides erroneous data, the system identifies the outlier and continues to operate based on the remaining healthy channels.
Online Replacement: The module supports hot-swapping in a TMR environment, ensuring that a single module failure does not require a turbine shutdown.
PRECISION SIGNAL CONDITIONING:
The module features advanced onboard signal conditioning to handle the high-dynamic range of turbine speeds. It utilizes a high-resolution frequency-to-digital conversion process that maintains accuracy from low-speed cranking up to maximum overspeed trip levels. Integrated hardware filters effectively eliminate electromagnetic interference (EMI) and signal ringing caused by high-voltage generator fields or surrounding industrial equipment.
OVERSPEED PROTECTION INTEGRATION:
It provides independent, high-speed overspeed detection logic that can trigger a trip command directly to the protective relay modules. This hardware-based protection path is independent of the main software execution, providing a secondary layer of safety that meets stringent international standards for turbine protection.
WHY BUY FROM WOC:
WOC is a premier provider of legacy and current Woodward control hardware. We maintain a significant inventory of the 5437-406, available in both unused and professionally refurbished conditions. Each TMR speed module is rigorously tested on our specialized frequency simulators to verify channel-to-channel synchronization and voting logic. Backed by a standard warranty and 24/7 technical support, we ensure your critical overspeed protection and speed governing systems remain rock-solid.
What is the 5437-406?
It is a 4-channel Speed Sensor Module designed for the Woodward MicroNet TMR control system. It is used to monitor turbine shaft speed for both governing and protective trip functions.
Does this module support Magnetic Pickups (MPUs)?
Yes, it is fully compatible with standard passive Magnetic Pickups as well as active proximity sensors. The module's input sensitivity is designed to detect pulses even at very low speeds where MPU voltage output is minimal.
How does the TMR voting work with this module?
The module fans out the speed signals to the three independent processors of the MicroNet TMR system. The processors compare the inputs; if one value deviates significantly, the system ignores that signal and utilizes the remaining two for continued safe operation.
Can I use the 5437-406 in a Simplex MicroNet system?
While specifically optimized for TMR architectures, these modules can technically function in standard racks. However, to maximize the safety and redundancy features of the H1A revision, it is highly recommended for use in the dedicated TMR chassis.
