Woodward 5466-409 MicroNet Pentium CPU

Description

Product Introduction & Engineering Value

The 5466-409 is a legacy Woodward MicroNet CPU that serves as the computing platform for compatible simplex control systems. Its 233 MHz Pentium processor, 64 MB RAM, Ethernet interface, and dual RS-232 ports support the control application’s processing and service communications. The module is installed in an expansion chassis rather than used as a standalone PLC CPU.

Replacement planning requires more than matching the front-panel label. Available documentation identifies this CPU as a simplex-only device and indicates that its expansion-rack installation requires the appropriate Main Transceiver and Remote Transceiver arrangement. The module is also described as obsolete/discontinued, making verified legacy-system compatibility particularly important.

Technical Specifications

The 233 MHz CPU, 64 MB memory, simplex architecture, Ethernet/dual RS-232 communications, expansion-chassis installation, and 0–50 °C operating range are reported by multiple sources.

Field Application & The “Trench” Experience

A typical maintenance problem with a legacy MicroNet cabinet is not simply a dead CPU. The harder situation occurs when the replacement CPU powers up but the existing application does not behave as expected. On a turbine shutdown, technicians need to establish exactly what software, communications, transceiver arrangement, and chassis configuration were present before removing the original 5466-409.

The practical sequence is to document the existing configuration, install the replacement, restore the appropriate application, establish Ethernet/service communication, and then verify the controller’s actual operating sequence before releasing the equipment for startup.

Specific application scenarios include:

1. Steam turbine governor control — legacy MicroNet systems can provide the computing platform for turbine control applications.
2. Gas turbine auxiliary control — the CPU can support application logic and communications in compatible MicroNet installations.
3. Generator/turbine control cabinet maintenance — the 5466-409 can serve as a replacement CPU when an existing simplex MicroNet installation must remain operational.

5466-409

5466-409

Transparency SOP: QA & Testing

For a New Surplus 5466-409, a useful inspection record should include:

1. Identity verification — confirm the Woodward part number and available serial/revision information.
2. Physical inspection — examine the board, connectors, Ethernet interface, RS-232 interfaces, and mounting hardware.
3. Memory/CPU verification — confirm the hardware corresponds to the documented 233 MHz / 64 MB configuration where test equipment permits.
4. Communication test — verify Ethernet and RS-232 interfaces using an appropriate test setup.
5. System test — where a compatible MicroNet test platform is available, confirm CPU initialization and application loading.
6. Condition record — distinguish New Surplus, Never Used, Used, and Refurbished status.

Supplier listings demonstrate that 5466-409 can appear under several inventory conditions, including never-used original packaging and refurbished stock. Those conditions should be explicitly confirmed on the purchase order.

The Veteran’s Tech Trap Guide

⚠️ Trap #1 — Installing it into a redundant configuration.
The 5466-409 is documented as a simplex CPU. Do not assume that another MicroNet CPU configuration can be substituted without reviewing the system architecture.

⚠️ Trap #2 — Forgetting the transceiver arrangement.
The expansion-rack installation requires the appropriate Main Transceiver (XCVR) and Remote XCVR arrangement. A CPU replacement without checking those interfaces can leave the controller unable to communicate correctly.

PRO TIP: Record the existing application and service configuration before removing the old CPU. The hardware replacement is only half the job; restoring the correct control application is equally important.

⚠️ Trap #3 — Treating 5466-409 as a current-generation CPU.
The module is associated with an older MicroNet architecture and has been described as obsolete/discontinued. Replacement procurement should therefore include a compatibility check against the installed system rather than assuming modern MicroNet hardware is interchangeable.

Dynamic FAQ

What is Woodward 5466-409?

5466-409 is a Woodward MicroNet Pentium CPU module. It uses a 233 MHz processor and 64 MB RAM and is intended for simplex MicroNet control systems.

Is the 5466-409 a redundant CPU?

No. Available documentation specifically identifies the 5466-409 as a simplex CPU.

What communication ports are available?

The documented configuration provides one Ethernet port and two RS-232 serial ports.

What software is associated with the 5466-409?

The module is commonly associated with AppManager for service and application loading through Ethernet.

Is Woodward 5466-409 New Surplus?

Inventory condition varies by supplier. Some current listings identify units as new or never-used, while others list refurbished units. Confirm the actual physical condition, packaging, serial information, and test report before purchase.

What warranty should I expect?

Warranty is supplier-specific. Current listings advertise different warranty terms, including 12-month and 2-year supplier warranties, so the applicable warranty should be confirmed in writing for the specific unit being purchased.