Description
Product Overview
The Woodward 5501-412 is a 220 VAC power supply board designed for the MicroNet Digital Control system. Its primary function is to provide operating power for the electronic hardware installed in a compatible MicroNet chassis. This includes the controller’s processing, I/O, and communication components. In turbine and other rotating-equipment control applications, a stable power supply is essential because interruptions or unstable supply conditions can affect controller operation, system diagnostics, and equipment availability.
The 5501-412 supports both simplex and redundant power supply configurations. In a simplex arrangement, one power supply serves the chassis. In a redundant arrangement, two compatible supplies can share the electrical load, providing an additional level of power-system availability. The board occupies three chassis slots, so chassis space and the existing power architecture must be checked before ordering. Its 220 VAC input rating is a critical selection detail: it should not be confused with the 24 VDC or 120 VAC/DC versions in the same MicroNet power supply family.
For maintenance teams, the Woodward 5501-412 is relevant when restoring an existing MicroNet installation without changing the complete controller architecture. Before replacing a failed unit, verify the chassis model, input supply wiring, grounding, backplane condition, and redundancy arrangement. Confirm that the replacement has the same part number and input rating. Woodward’s documentation lists this model with an inactive product status, so procurement may involve remaining inventory or previously installed units. The supplied board’s condition and test history should be confirmed rather than inferred from its appearance.
Product Introduction (Non-Templated)
A MicroNet controller can lose its operating capability when its chassis power supply fails, even if the processor and I/O boards remain serviceable. The 5501-412 addresses the 220 VAC power supply requirement in compatible MicroNet installations and supports both simplex and redundant configurations.
The three-slot footprint and input-voltage rating are key replacement checks. A 24 VDC or 120 VAC/DC MicroNet supply is not an equivalent substitute simply because it belongs to the same product family.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 5501-412 |
| Manufacturer | Woodward |
| Product Series | MicroNet Digital Control |
| Product Type | Power supply board |
| Input Voltage | 220 VAC |
| Input Frequency | Not verified for this exact model |
| Power Output | Regulated DC supply for MicroNet chassis electronics; individual rail ratings not verified |
| System Configuration | Simplex and redundant |
| Chassis Occupancy | 3 slots |
| Installation | Compatible MicroNet chassis |
| Operating Temperature | 0 to 55°C (32 to 131°F), as reported in secondary product data |
| Product Status | INA (inactive), according to Woodward documentation |
| Communication Protocol | Not applicable as a power supply board |
| Protection Rating | Not verified |
| Dimensions | Not verified |
Technical caution: Do not assume that the 5501-412 has the same output ratings or connector details as other MicroNet power supplies. Confirm the exact electrical requirements from the chassis documentation and the board’s identification label.
5501-412
Related Products
The following are related Woodward MicroNet power supply or chassis components. They are not automatically interchangeable with the 5501-412.
- 5501-410 – MicroNet 24 VDC power supply.
- 5501-411 – MicroNet 120 VAC/DC power supply.
- 5501-465 – MicroNet simplex 24 VDC power supply.
- 5501-466 – MicroNet simplex 120 VAC/DC power supply.
- 5501-467 – MicroNet simplex 220 VAC/DC power supply.
- 5501-380 – 5009/MicroNet TMR power supply, 120 VAC/DC.
- 5501-381 – 5009/MicroNet TMR power supply, 220 VAC.
- 5501-423 – MicroNet 12-slot motherboard.
These part numbers are identified in Woodward product documentation. Check chassis compatibility, supply architecture, and input requirements before selecting an alternative.
Frequently Asked Questions
Q1: What is the Woodward 5501-412 used for?
The 5501-412 is a 220 VAC power supply board for Woodward MicroNet Digital Control systems. It supplies operating power to the electronics installed in a compatible controller chassis.
Q2: Is the 5501-412 an analog I/O module?
No. Woodward documentation identifies it as a MicroNet power supply board. Descriptions calling it an analog input/output module are inconsistent with the documented product designation.
Q3: Can the 5501-412 operate in a redundant power supply configuration?
Yes. Product information identifies simplex and redundant operation. In redundant installations, verify that both power supplies are compatible and that the chassis wiring and load-sharing arrangement follow the system documentation.
Q4: Can I hot-swap the 5501-412 while the controller is running?
Do not assume that live removal or installation is permitted. Follow the applicable MicroNet chassis and plant shutdown procedures. Isolate the supply and verify electrical safety before handling the board.
Q5: Can I replace the 5501-412 with a 5501-411?
Not as a direct substitution without an approved system design change. The 5501-411 is identified as a 120 VAC/DC power supply, while the 5501-412 is the 220 VAC version. Confirm the required input voltage and chassis configuration before replacement.
Q6: Does the 5501-412 require firmware v3.1?
The 5501-412 is a power supply board, not a programmable controller or firmware-dependent I/O module. Controller firmware compatibility should be checked against the MicroNet processor and system configuration.
Q7: What should be checked before purchasing a replacement 5501-412?
Verify the complete part number, 220 VAC input requirement, chassis compatibility, three-slot footprint, and simplex or redundant configuration. For used or surplus inventory, request photographs of the actual board, inspection results, and functional test records.
Procurement note: Woodward’s documentation lists the 5501-412 as inactive. When sourcing a replacement, prioritize exact part-number verification and documented electrical testing. Do not substitute another MicroNet power supply based on family name alone.
