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Phone: +86 16626708626Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | A413325 |
| Alternate Designation | IPU 421576-2A |
| Manufacturer | Valmet Automation / Metso |
| Module Type | IPU (I/O Power Unit) Module |
| Primary Function | Provides stable 12V and 5V DC output |
| Output Voltages | 12V DC, 5V DC |
| System Compatibility | Valmet Damatic DNA industrial automation |
| Known Revision | Model 06 appears in listings |
| Weight | 1 kg (2.2 lbs) |
| Category | Power Supplies / I/O Power Unit |
| Origin | Made in Finland |
| Warranty (common) | 12 months return base |
Product Introduction
Valmet A413325 is an IPU (I/O Power Unit) module that supplies stable 12V and 5V DC power to Valmet Damatic DNA industrial automation systems. It provides the power rails needed for I/O cards and field devices in the control rack.
This module is typically sourced as used or reconditioned surplus, since it is a legacy power unit for older Damatic DNA installations. Market listings show Model 06 revisions, so verify the revision matches your installed rack before ordering.
- A413325
- A413325
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No 12V or 5V at I/O terminals | IPU module failed or no input power | ✅ High | Measure input voltage at IPU terminals, check 12V/5V output rails | Replace IPU if input is present but outputs are missing |
| I/O modules reset randomly | IPU output voltage dropping under load | ✅ High | Measure 12V/5V under load, check for voltage droop | Replace IPU and verify total rack current draw |
| One output rail dead (5V only) | Internal regulator failure on IPU | ✅ High | Measure each rail separately with multimeter | Replace IPU module |
| Multiple rack cards dead | IPU not powering the backplane | ✅ High | Check IPU output to backplane, verify fuse/PSU upstream | Replace IPU after confirming upstream power is good |
| IPU LED off or error | Module fault or input power missing | ✅ High | Measure input terminals, check module status LED | Check PSU and fuses before replacing IPU |
| Output voltage too high/low | Regulator drift or component failure | ✅ High | Measure output with precision multimeter, compare to 12V/5V | Replace IPU if output is outside ±5% tolerance |
| IPU overheats | Overcurrent or shorted downstream load | ✅ High | Check total I/O current draw, inspect for shorted cards | Replace IPU and correct the load issue |
Contact technical support with photos of the front label, revision tag, input/output wiring, and voltage measurements if you cannot isolate the fault.
Frequently Asked Questions
Q: Is Valmet A413325 still available from the factory?A: No. It is an obsolete legacy power unit. You will find it only through surplus dealers as used, reconditioned, or new-no-box stock.
Q: What does “IPU” stand for on this module?A: IPU means I/O Power Unit. It provides the 12V and 5V DC rails that power I/O cards and field devices in the Valmet Damatic DNA rack.
Q: I see Model 06 listed—is that the only revision?A: Model 06 is the revision most commonly on the market now. Other revisions may exist, but do not assume cross-compatibility. Match the revision on your installed unit.
Q: Can I hot-swap this power module?A: No. Do not pull this live. Kill power to the rack before removal. Hot-swapping a power unit can damage the backplane, I/O cards, or the module itself.
Q: Will I/O configuration be lost when I swap it?A: The IPU itself does not hold user logic or I/O mapping. Your PLC program stays in the controller, but you should verify all I/O points are powered correctly after the swap.
Q: What condition should I expect for this part?A: Most listings are used or reconditioned. Some sellers offer “new no box” surplus. Reconditioned units typically carry a 12-month warranty.
Q: Why is it cheaper than ordering from the OEM?A: Because the OEM does not actively stock it anymore. You are buying from decommissioned systems or excess inventory, which drives the price down but adds verification responsibilities.
Q: What typically fails on this IPU module?A: Internal regulators can drift or fail, causing one rail (5V or 12V) to go dead. Overcurrent from shorted downstream cards can also overheat or damage the IPU. Always check total rack current before installing a replacement.
Q: Is this a direct replacement for every A413325?A: The model number is the right first check, but you must match the revision (Model 06) and verify your Damatic DNA rack and controller firmware are compatible. Do not assume plug-and-play without that check.
