Woodward 5453-277 | MicroNet TMR Chassis, UL Listed, Factory Sealed Condition

Description

Unboxing & Physical Snapshot

• Brand & Model: Woodward 5453-277, MicroNet TMR Chassis (Rev A Rack)
• Physical Dimensions: 15.00 in W × 13.25 in H × 6.50 in D
• Estimated Shipping Weight: 12.1 lb (packaged for LTL freight)
• What’s in the Box: TMR chassis rack assembly, backplane PCB, integrated retaining clips, printed installation drawing; terminal hardware sold separately.

Product Introduction (Structure B: Architecture hook)

This chassis mounts directly into standard 19-inch control cabinets and forms the physical backbone for Woodward MicroNet TMR turbine safety controls. It accepts dual redundant power supplies and multiple processor and I/O cards, locking each component into the backplane’s gold-plated edge connectors to maintain signal integrity across 2oo3 voting logic.

Each slot has built-in keying tabs that prevent misinsertion of incompatible modules, a small mechanical feature that stops costly backplane pin damage during rush maintenance swaps. The molded black housing includes internal airflow channels, which route cabinet air across each plugged-in card’s anodized heatsink during continuous plant operation.

Core Technical Specifications

Global Compliance & Industry Certifications

• CE Mark
• UL/cUL Listed
• IECEx (available for qualified production lots)
• DNV GL marine certification (optional, project-specific)

The UL/cUL listing validates the chassis’s material flammability rating and spacing between high-voltage traces, which reduces arc flash risk inside power generation control cabinets. Verify specific lot certifications with OEM.

Long-Term Storage & Asset Preservation Guide

Store this chassis inside its original ESD shielding bag and rigid corrugated shipping container when held as a spare. Even small electrostatic discharges can degrade the backplane’s fine trace layers before the unit ever sees service.

Keep warehouse humidity below 60% RH. Condensation will corrode gold edge contacts and create intermittent faults that only appear under vibration, hard to isolate during a turbine trip event. Inspect contact surfaces once every 18 months if stored longer than three years.

Do not stack heavy inventory directly on top of the chassis. Pressure can crack the molded slot keying tabs or warp the backplane, rendering the spare unusable when pulled for emergency changeout.

Physical Installation Prerequisites

Leave a minimum of 50 mm clearance above and below the chassis for convection cooling. Blocked airflow raises internal component temperature and accelerates fatigue on backplane solder joints.

Secure to 19-inch rack rails with M6 machine screws at all four mounting points. Attach a dedicated equipment grounding wire to the chassis’s designated ground lug; this connection must tie back to the plant’s instrument earth bus, not protective power ground.

Buyer’s FAQ

Q: What HS tariff code applies to Woodward 5453-277 for cross-border shipments? A: The primary applicable HS code falls under 853890, for electrical control chassis assemblies. Confirm classification with your local customs broker before export filings, as country-specific rulings may shift based on shipment documentation.

Q: What country of origin is listed for this chassis? A: Country of Origin is United States. This marking appears on the chassis nameplate and must be reproduced on commercial invoices for trade compliance audits.

Q: Does the 5453-277 ship with preloaded firmware? A: No. The chassis is a passive backplane rack. Firmware resides on the separate CPU modules installed into the slots, which are not included with the bare chassis assembly.

Q: Should I purchase all-risk shipping insurance for this spare asset? A: Yes. Physical damage to the molded housing or backplane traces during transit often cannot be detected until the unit is racked and powered. All-risk coverage covers replacement value if handling damage occurs.