Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | A413331 |
| Manufacturer | Metso Automation / Valmet |
| Module Designation | SPU |
| Product Type | Power unit module |
| Primary Function | System power supply |
| Reported Output Rating | 35 A |
| Input Voltage | Not independently verified |
| Input Frequency | Not independently verified |
| Output Voltage | Not independently verified |
| Output Regulation | Not independently verified |
| Protection Features | Not independently verified |
| Cooling Method | Not independently verified |
| Installation Method | Confirm from the original system assembly |
| Product Status | Discontinued |
The 35 A output figure and SPU designation are consistently reported in available product identification records. They do not establish the complete electrical specification. Do not assume a nominal 24 VDC output or a particular AC input range without checking the equipment label and applicable documentation.
Product Introduction
Metso A413331 SPU Power Unit Module
The Metso A413331 is an SPU power unit module used in legacy Metso Automation / Valmet control equipment. It is identified as a power supply module with a reported 35 A output rating. Its role is to provide electrical power to the compatible control-system assembly, making it a system-level component rather than an individual signal-processing I/O card.
A413331
Because this part is discontinued, replacement selection requires careful comparison with the installed unit. The output rating alone is insufficient to establish interchangeability. Input requirements, output voltage, connector arrangement, power distribution design, and protection characteristics must all match the original installation.
Application Scenarios & Field Pitfalls
A failure in a system power unit can affect multiple control modules simultaneously. Symptoms may include unexpected rack shutdowns, module resets, communication interruptions, or unstable controller operation. However, these symptoms do not automatically prove that the A413331 is defective; downstream overloads, wiring faults, and distribution problems can produce similar behavior.
Typical application scenarios
- Legacy DCS power maintenance: Replacement of a failed SPU in a compatible Metso / Valmet control installation.
- Control cabinet restoration: Repair of power distribution assemblies in existing process-control cabinets.
- Spare-parts planning: Maintaining a replacement unit for installations where the original power module is discontinued.
- System recovery: Restoring power to compatible automation hardware after a confirmed power-unit failure.
Engineering checks before replacement
- Verify the output voltage. The reported 35 A rating does not confirm the DC output voltage. Compare the nameplate and system documentation before connecting the replacement.
- Check the AC input requirements. Confirm the permitted input voltage and frequency. Do not infer these values from other Metso power-unit models.
- Inspect downstream loading. Measure the total load and investigate short circuits or overloaded branches before installing another power unit.
- Examine connectors and power distribution. Check terminal condition, connector keying, cable routing, and signs of heat damage. A mechanically compatible connection does not guarantee electrical compatibility.
- Test under load. For a used or surplus unit, request output-voltage stability and load testing, along with inspection for overheating and damaged components.
Related Products
- A413337 – SPUC Power Unit: Another Metso power-unit designation, reported with a different, higher current configuration. Do not use it as a direct substitute without verifying the system’s electrical and mechanical requirements.
- A413325 – IPU Power Unit: A separate Metso power-unit module. Its designation and configuration differ from the A413331 SPU; verify the intended installation before considering it.
- A413310 – Power Supply Unit: A Metso power supply listed with a 2 A rating and 230 VAC, 50 Hz input. Its rating and function differ substantially from the reported 35 A A413331.
- A413346 – FPUS Battery Backup Unit: A battery backup-related power unit. It serves a different power-management role and should not be treated as an SPU replacement.
- A413064 – PLC Controller Board: A controller-related board with a reported 100–240 VAC input and 24 VDC output. It is a control component, not a substitute for the .
- A413000 – Processor Board: A Metso processor board used for control-system processing. It belongs to a different hardware function and should be evaluated separately from power-supply components.
Procurement note: Specify Metso SPU, 35 A and request a photograph of the nameplate, connector side, and revision markings. For surplus or previously installed equipment, request documented output testing and load-test results. Do not approve A413337, A413325, or another power unit as an equivalent solely because it belongs to the same manufacturer’s product family.
