Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | A413139 |
| Alternate Part Number | A413139-10 |
| Manufacturer | Metso Automation / Valmet |
| Module Designation | AOH4 |
| Product Type | Control module / PC board |
| Main Function | Automation control board |
| System Generation | Legacy Metso / Valmet automation |
| Board Dimensions | Approx. 130 × 20 × 191 mm, based on one reseller’s listed package dimensions |
| Weight | Approx. 0.2 kg, based on one reseller listing |
| Input Voltage | Not independently verified |
| Output Signal | Not independently verified |
| Channel Count | Not independently verified |
| Communication Interface | Not independently verified |
| Mounting Arrangement | Confirm from original equipment |
| Product Status | Discontinued |
The AOH4 designation is supported by multiple product identification records. Available sources do not provide a reliable OEM electrical specification for this exact board. The listed dimensions are reseller shipping dimensions and should not be treated as confirmed PCB measurements.
Product Introduction
Metso A413139 AOH4 Control Module
The Metso A413139, also identified as A413139-10, is a legacy Metso Automation / Valmet printed circuit board designated AOH4. It is classified as a control module in available part records. Because detailed OEM documentation for its internal circuitry and interface functions is not readily established, the AOH4 designation and physical part identification should be used as the starting point for replacement verification.
A413139
For maintenance teams supporting older Metso control installations, the main concern is revision and system compatibility. A board with a matching general description may still differ in firmware, connector layout, or hardware configuration. Confirm the complete part number and installed board revision before procurement or commissioning.
Application Scenarios & Field Pitfalls
The A413139 is relevant to maintenance work involving legacy Metso / Valmet automation hardware. When a control board fails, symptoms may include abnormal system operation, loss of a board-related function, or diagnostic alarms. These symptoms are not enough to establish that the AOH4 board itself is defective; power, backplane connections, field wiring, and associated modules should also be checked.
Typical maintenance scenarios
- Legacy system restoration: Replacing a failed board in an existing Metso automation installation.
- Control cabinet maintenance: Keeping a verified spare available for aging control hardware.
- Board-level troubleshooting: Comparing a suspect board with a known-good unit during fault isolation.
- Obsolete equipment support: Maintaining older process-control installations where original replacement channels are limited.
Engineering checks before replacement
- Match the complete part number. Confirm whether the installed board is or -10. Do not assume every suffix or revision is interchangeable.
- Compare physical layout. Inspect connector positions, board dimensions, mounting points, and component layout against the installed unit.
- Verify system compatibility. Confirm the target rack, controller generation, firmware requirements, and associated hardware from the plant’s original documentation.
- Inspect the surrounding circuit. Check supply rails, connector contacts, and signs of overheating before installing a replacement board.
- Request functional test evidence. For used or surplus stock, ask for inspection records and a documented test against a compatible system where possible.
Related Products
- A413135 – AOU-4: Metso four-channel analog output module. It has a defined analog output function and should not be treated as an equivalent to the control board.
- A413140 – BIU-8: Eight-channel binary input control card. Used for discrete input acquisition rather than the board function.
- A413187 – AIH8: Eight-channel analog input module with HART capability. Used for intelligent field transmitter signals; not a control-board substitute.
- A413095 – GDU: Metso GDU add-on module. Its designation indicates a different hardware function, so verify the target system before considering it for the same assembly.
- A413076 – Fieldbus Controller Board: Fieldbus-related controller board for communications within a compatible automation installation. It performs a different role from the .
- A413000 – Processor Board: Metso processor / CPU module used for system processing. It belongs to the controller hardware category rather than the board category.
Procurement note: Specify Metso , including the suffix -10 where present. Request clear photographs of the board label, revision markings, and connectors. Since detailed electrical specifications remain unverified, do not approve a replacement based only on a generic “control module” description.
