5464-333 Woodward Isolated T/C High Fail Module

Product Overview

The Woodward 5464-333 (5464333) serves as a critical sensing interface within the MicroNet TMR and Simplex control platforms. This module specifically manages high-fail isolated thermocouple inputs, ensuring that any sensor failure or open circuit forces the signal to a "High" state to trigger immediate safety protocols. By providing galvanic isolation for each channel, the 5464-333 eliminates common-mode noise and prevents ground loop interference from compromising turbine governing or compressor surge protection. This component remains a vital spare for maintaining legacy MicroNet architectures where input isolation is a non-negotiable safety requirement.

Technical Specifications

This module adheres to strict Woodward aerospace-grade engineering standards for high-speed industrial control:

• Model: 5464-333 (MicroNet Series)

• Brand: Woodward

• Condition: 100% Brand New Original

• Input Type: Isolated Thermocouple (T/C)

• Failure Mode: High Fail (Signals maximum value upon sensor rupture)

• Isolation Rating: Galvanic isolation between channels and system logic

• System Compatibility: MicroNet Simplex / MicroNet Plus Chassis

• Operating Temperature: -40 to 70 deg C

• Data Resolution: 16-Bit Analog-to-Digital conversion

• Power Requirements: Internal chassis-powered (+5 VDC / +24 VDC)

Engineering Advantages

The Woodward 5464-333 offers distinct mechanical and electronic benefits for high-availability environments:

• Fault Containment: The per-channel isolation ensures that a catastrophic electrical failure on one thermocouple does not propagate to the CPU or adjacent input channels.

• Signal Integrity in EMI-Rich Environments: Specialized filtering circuits reject electromagnetic interference generated by large motors and high-voltage switchgear.

• Hot-Swappable Design: Engineers can replace the 5464-333 module while the system remains powered (within a TMR configuration), drastically reducing MTTR (Mean Time To Repair).

• Fail-Safe Logic: The "High Fail" hardware logic provides a deterministic response for critical temperature loops, preventing the control system from assuming a "cold" state during a wire break.

FAQs

• Is the 5464-333 still available for new system designs?Woodward officially inactivated this module family in 2015. While Woodward recommends RTCnet or LINKnet HT for new builds, we supply 100% Brand New 5464-333 units to support existing MicroNet installations that require exact-match spares.

• Can I replace a 5464-332 with a 5464-333?No. The 5464-332 is a standard T/C Analog In module, whereas the 5464-333 is a "High Fail" version. Switching between them without GAP (Graphical Application Program) modifications may cause incorrect safety trip logic.

• Does this module require an external Field Terminal Block (FTM)?Yes, the 5464-333 typically interfaces with a specific Woodward FTM via a high-density cable. Ensure your existing FTM and cabling are compatible with the Isolated T/C pinout.

• What is the warranty on these brand new units?All 5464-333 modules undergo rigorous testing and carry a full industrial warranty, ensuring they meet the original Woodward performance specifications for turbine control.