When a control board dies in an industrial PC, SCADA, or edge control setup, the replacement decision is about more than just finding a board that powers on. You have to match the machine's interface and accept the trade-offs that come with each listing. The four boards in this comparison represent very different replacement problems, and the right pick depends less on feature count and more on what your line needs to talk to.
Quick take
The Soudronic 4.10.801.811 is the direct replacement board for a narrow machine family. The Egan 470590 is the tested graphic controller. The Apex Industrial Tech 31-04115-08 is the one to match by model. The ST4504-2 is the board to consider when you need a general automation pick.
Listed Price Comparison
| Product | Listed Price | Price Bar |
|---|---|---|
| Soudronic 4.10.801.811 Circuit Board | USD 59.60 | |
| Egan 470590 Graphic Controller Board | USD 254.15 | |
| Apex Industrial Tech 31-04115-08 PCB Control Board | USD 199.99 | |
| ST4504-2 Industrial Control Board | USD 99.99 |
The four listings span USD 59.60 to USD 254.15, so the decision is not just about function.
Decision Matrix
| Board | Condition | Interface |
|---|---|---|
| Soudronic 4.10.801.811 Circuit Board | Used | Card-edge connector |
| Egan 470590 Graphic Controller Board | Used | ISA edge connector |
| Apex Industrial Tech 31-04115-08 PCB Control Board | New - open box | Edge variants PCB |
| ST4504-2 Industrial Control Board | Used | Gold edge connector |
Product Notes
Soudronic 4.10.801.811 Circuit Board
The Soudronic board is the most targeted option here at USD 59.60. It is a used, multi-layer industrial PCB designed for Soudronic can-making and welding machinery, handling control logic and signal interface functions. The card-edge connector is meant for slot installation in a control rack, and the compatibility field points to a direct replacement for OEM part 4.10.801.811. If your machine is built around that part number, this is the obvious first board to consider. The limitation is its narrow application: it is built for Soudronic equipment. For anything outside that machine family, the other boards give you more flexibility.
Egan 470590 Graphic Controller Board
The Egan 470590 is the highest-priced board at USD 254.15, and it is the only one described as tested. It is also the only one with an ISA edge connector interface, so it targets a specific slot format. The board carries an onboard processor, multiple IC banks, and video/output connectors, which fits its role as a graphic controller for CNC machine interfaces and industrial video/display control. If you are repairing a legacy ISA-based system and need that video controller function, the tested status is the main reason to choose it. The trade-offs are the proprietary industrial video system design and the high price; it does not serve as a simple control logic board.
Apex Industrial Tech 31-04115-08 PCB Control Board
The Apex Industrial Tech board stands out as the only new open-box listing here, priced at USD 199.99. The title identifies it as an edge variants PCB control board and gives both a model number, 31-04115-08, and an MPN of 30-04376-02. That makes it a strong candidate when you already have one of those part identifiers in hand and want a board that has not been pulled from a used machine. The reason to choose it is the new open-box condition. The limitation is that the available detail centers on the model and MPN, so fit depends on matching those numbers to your own system. If you are not working from a known part number, the other boards give you more application context.
ST4504-2 Industrial Control Board
The ST4504-2 is the gold-edge-connector option at USD 99.99, slotted between the low and high ends of the price range. It is a used board with a CE mark and a model reference of WPC-179, and the description points to OEM industrial control systems, automation equipment, or legacy machine controllers. Multiple integrated circuits and green jumper wires indicate that the board has had field modification or repair, which is worth knowing before you rely on it in a critical line. The reason to choose it is the combination of a gold edge connector and a moderate price for a board aimed at general automation work. The limitation is that the board's compatibility is carried by the ST4504-2 label and the WPC-179 model number, so the fit depends on those identifiers rather than a stated machine type.
Final Recommendation by Use Case
If your line is a Soudronic can-making or welding machine, the Soudronic 4.10.801.811 is the board that gets you back to production. If you are rebuilding a CNC or legacy industrial video display system, the Egan 470590 is the controller you want. If you have the 31-04115-08 or 30-04376-02 number in front of you, the Apex Industrial Tech board is the part-number match. And if you are working on older OEM automation or a generic legacy machine controller, the ST4504-2 is the one to benchmark against.
