Woodward 5501-467 | Direct Replacement for MicroNet Plus

Description

Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.

3. Product Introduction

When a turbine control rack loses its CPU, every I/O module downstream goes quiet — and the outage clock starts. The Woodward 5501-467 is the MicroNet Plus CPU that runs the control logic and keeps the rack’s I/O modules coordinated. It carries a 32-bit processor and dual Ethernet ports for engineering access and peer communication. Firmware and application revision must match the rack before you swap (—though your mileage may vary depending on the existing program archive).

5501-467

5501-467

5501-467

5501-467

5501-467

4. Key Technical Specifications

5. Field Application & Technical Pitfalls (The Engineer’s Guide)

Where this module is critical:

• Gas and steam turbine control racks in power generation, where the CPU runs sequencing, permissives, and trip logic across the I/O modules.
• Compressor anti-surge control on process trains, where fast I/O coordination depends on the CPU scan staying consistent.
• Legacy MicroNet Plus installations kept alive because the mechanical side runs fine and a controls migration is a capital project, not a maintenance order.

Three pitfalls that bite during replacement:

• Firmware and application archive mismatch. Warning: a CPU with a newer firmware revision can accept the old application archive and still change instruction behavior in subtle ways. Match the revision to the existing archive and verify the memory module type before you power up. Well, technically the module may boot with a mismatched application, but the CPU will not run the process safely.
• Ethernet IP, subnet, and duplicate-node conflicts. Warning: the dual ports may serve separate networks — engineering access on one, peer communication on the other. A replacement carrying a test-bench IP or a duplicate address will show link activity and still fail to communicate. Confirm the address and subnet against the network drawing before you connect the cables.
• Backplane seating, rack slot, and ESD. Warning: the CPU must sit in the correct rack slot, and a partially seated connector can arc on power-up. Do not assume live removal is allowed for your slot. Remove rack power, ground yourself, and confirm the connector is fully seated before energizing.

Lesson learned: A technician replaced a failed CPU with a shelf spare, powered up, and watched the rack report healthy while the turbine refused to start. Root cause — the spare carried a firmware revision two steps behind the application archive, and the CPU silently rejected the program. The hardware was good; the revision was not.

6. Quality Control (QC) SOP & Transparency

1. Inbound Verification. Each CPU is checked against the OEM packing list, label typography, serial number format, and date-code range. Firmware revision and battery condition are logged before the unit enters stock.
2. Live Rig Testing. The module is seated in a compatible MicroNet Plus test rack with a known-good power supply and simulated I/O. We power on, confirm rack recognition, verify the OK status, and run a minimal application through the engineering port.
3. Parameter Testing. Backplane current draw, Ethernet link status, serial port continuity, and battery voltage under load are checked against the OEM datasheet where published. Undocumented values are flagged for buyer confirmation rather than guessed.
4. Final QA & Packaging. The CPU ships in an anti-static bag with a QC-passed label, a test record showing the firmware revision we verified, and a fresh battery installed unless you specify otherwise.

7. Frequently Asked Questions (FAQ)

Can I hot-swap this CPU in a live MicroNet Plus rack? No. Remove rack power first. The backplane was not designed for live processor removal, and pulling the card under power can corrupt the application or damage the rack.

How do I confirm it matches my rack? Send the rack model, firmware revision, application archive name, old module label photo, and network drawing with IP addresses. We cross-check the catalog number and test record before shipping. Exact fit still depends on the OEM support matrix for your rack firmware.

What’s the warranty? 12 months from delivery for functional failure under normal operation. The battery is a consumable and carries a 90-day replacement guarantee.

How can I tell genuine OEM from refurbished? Genuine units carry the original Woodward label with consistent typography and a traceable serial number. Refurbished units carry our QC tag in addition to the OEM label, and we disclose condition on the quote.

Does it ship with the application program? No. We ship a test record, not your project archive. Load your application with the OEM engineering tool and verify the firmware revision before going into production.

Will it work in a redundant CPU pair? Only if the firmware and application match the partner CPU exactly. Send us the partner’s revision details, and we will confirm what we can before shipment. A mismatched pair can look healthy while running single-CPU.

What do you need to quote the right replacement? Rack model, firmware revision, application archive name, old label photo, and IP address list. That five-minute upload prevents most wrong-part returns.