Woodward 5501-412 MicroNet 220 VAC Power Supply

Description

Key Technical Specifications

Woodward’s documentation distinguishes the 5501-410 as the 24 VDC MicroNet power supply, 5501-411 as the 120 VAC/DC version, and 5501-412 as the 220 VAC version.

Product Introduction

The Woodward 5501-412 is a MicroNet power supply board designed for control-system applications requiring a 220 VAC input. It belongs to the MicroNet Digital Control hardware family used in turbine and engine control systems.

This is a power-supply component rather than a CPU or I/O module. Because Woodward lists the part as inactive, replacement planning should verify the exact MicroNet chassis, power architecture, input voltage, and approved replacement path before installation. Secondary industrial-equipment sources also categorize the 5501-412 as a Woodward power supply.

5501-412

5501-412

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation — 5–10 Minutes

⚠️ Safety First: The 5501-412 is a 220 VAC power-supply board. De-energize the MicroNet cabinet and follow the site’s lockout/tagout procedure before accessing the board.

Tools Required:

• ESD wrist strap
• CAT-rated digital multimeter
• Insulated screwdriver
• Wire labels
• Smartphone or camera
• Current MicroNet electrical drawings

Data Backup:

1. Record the complete 5501-412 part number.
2. Photograph the installed board and chassis position.
3. Record the MicroNet chassis model.
4. Document the incoming AC supply arrangement.
5. Identify all associated MicroNet power-supply boards.
6. Check whether the system uses simplex or redundant power architecture.

⚠️ Do not confuse the 220 VAC 5501-412 with the 24 VDC 5501-410 or 120 VAC/DC 5501-411. Woodward assigns these separate part numbers to different MicroNet power-supply configurations.

Stage 2: Removing the Old Module — 5 Minutes

1. Isolate the incoming 220 VAC supply.
2. Apply lockout/tagout.
3. Verify absence of hazardous voltage with an appropriately rated meter.
4. Allow the system to discharge according to the applicable maintenance procedure.
5. Wear an ESD wrist strap.
6. Photograph the board position and connections.
7. Release the board retaining hardware.
8. Remove the 5501-412 carefully from the chassis.
9. Inspect the backplane and connector contacts.

⚠️ Keep the original board available until the replacement has passed the power-up and system checks.

Stage 3: Installing the New Module — 5–10 Minutes

1. Verify the replacement part number is 5501-412.
2. Confirm the MicroNet chassis is designed for this power-supply configuration.
3. Verify the incoming supply is actually 220 VAC.
4. Inspect the replacement connector and board for damage.
5. Align the board with the chassis guides.
6. Insert it straight into the chassis.
7. Fully engage the retaining mechanism.
8. Verify grounding and chassis connections.
9. Inspect the board installation before restoring power.

Self-Checklist:

• 5501-412 verified
• 220 VAC input verified
• MicroNet chassis verified
• Grounding checked
• Board fully seated
• Connector inspected
• Redundant/simplex arrangement documented
• Incoming supply isolated before work

Stage 4: Power-On & Testing — 10–15 Minutes

1. Perform a final inspection before applying 220 VAC.
2. Verify the incoming AC voltage.
3. Confirm grounding and protective-earth connections.
4. Restore power according to the approved Woodward procedure.
5. Observe the MicroNet power-system status.
6. Check for abnormal alarms or power-supply faults.
7. Verify that connected MicroNet modules initialize correctly.
8. Check the control system for communication or module faults.
9. Monitor the system during the initial operating period.
10. Record the measured supply voltage and commissioning result.

⚠️ Do not use a suspected 24 VDC or 120 VAC replacement in place of the 220 VAC 5501-412. The voltage variant is a fundamental compatibility parameter.

Frequently Asked Questions (FAQ)

What is the Woodward 5501-412?

The 5501-412 is a 220 VAC MicroNet power supply board used in Woodward MicroNet control systems. Woodward’s parts documentation explicitly identifies it as a MicroNet Power Supply (220 VAC).

Is the 5501-412 an I/O module?

No. The 5501-412 is a power-supply board, not an analog or discrete I/O module. It supplies the MicroNet control hardware.

What input voltage does the 5501-412 use?

Woodward documentation identifies the 5501-412 as the 220 VAC MicroNet power-supply version. The same documentation separately identifies 5501-410 as 24 VDC and 5501-411 as 120 VAC/DC.

Is the 5501-412 obsolete?

Woodward’s MicroNet documentation marks the part status as INA, meaning inactive. This makes it a legacy procurement item, so actual stock condition should be confirmed before ordering.

Can I replace 5501-412 with 5501-411?

Not without checking the installed power architecture. 5501-411 is the 120 VAC/DC version, while 5501-412 is the 220 VAC version. The incoming supply and MicroNet chassis configuration must match the replacement.

Is the 5501-412 used in redundant MicroNet systems?

The 5501-series MicroNet power architecture includes configurations using multiple power supplies. However, the exact redundancy arrangement must be checked against the installed MicroNet chassis and system drawings rather than assumed from the part number alone.

What should I verify before purchasing a surplus 5501-412?

Request:

• Exact part number: 5501-412
• Hardware revision
• 220 VAC input configuration
• MicroNet chassis compatibility
• Simplex or redundant architecture
• Connector condition
• Power-up test results
• Physical condition
• New Original / New Surplus / Refurbished status
• Warranty and return terms

For this legacy power board, input-voltage variant and MicroNet chassis compatibility should be confirmed before purchase. Woodward’s own parts documentation distinguishes the 5501-410, 5501-411, and 5501-412 power-supply variants.