If you are maintaining an OEM industrial control system, an automation line, or a legacy machine controller, the control board in the cabinet often becomes the sticking point. You need a replacement that fits the slot, carries the right compliance markings, and will actually run the machine. The ST4504-2 Industrial Control Board is a used control board that checks some of those boxes, but it comes with the kind of trade-offs you need to weigh before you buy.
ST4504-2 Industrial Control Board - CE Marked - Gold Edge Connector
Listed price: USD 99.99 Condition: Used
Quick Verdict
At $99.99, the ST4504-2 is a reasonably priced used board for anyone working on older industrial equipment. It brings a CE marking, a gold-finger edge connector, and the familiar look of a compact control board with multiple integrated circuits. The main caveat is that the board has already been in service: it shows normal wear, and green jumper wires point to possible field modification or repair. This is a board for someone who can adapt to a used component, not for a project that demands a factory-fresh part.
Who It Suits
This board suits technicians and maintenance teams working on OEM industrial control systems, automation equipment, or legacy machine controllers. If your machine takes a board with a gold-finger edge connector and you need a replacement without paying for new inventory, the ST4504-2 is relevant to your bench. The CE compliance marking also matters if your equipment must be maintained in a region or application that requires that marking.
What Stands Out from the Listed Details
The board is labeled ST4504-2 and carries the model identifier WPC-179, giving you two references to check against your system. The gold-finger edge connector is the most distinctive hardware feature; it is the part that plugs into a mating slot and is a common design for internal control boards. The multiple integrated circuits indicate the board has real processing logic rather than being a simple breakout or passive board. The intended environments are OEM industrial control systems, automation equipment, or legacy machine controllers, which gives you a clear sense of where this board belongs. The seller, Capital Equipment Solutions, Inc., specializes in new and preowned equipment, sales, and service.
Meaningful Trade-offs
The biggest trade-off is the board's used condition. It shows normal wear consistent with service, and the green jumper wires are a sign that someone has modified or repaired it at some point. If you need a board with a clean, untouched history, this is not it. You also should be comfortable with the fact that you are buying a component that has been pulled from service; it may have quirks from its previous life. The $99.99 price reflects that used status. When you factor in the need to confirm the ST4504-2 label and WPC-179 model number against your own equipment, this is a board for careful buyers, not for someone looking for a drop-in solution with zero questions.
Bottom Line
The ST4504-2 Industrial Control Board is a solid candidate for anyone servicing older gear who can work with a used board showing its service history. The CE marking, gold-finger edge connector, and $99.99 price are all concrete pluses. Just go in knowing that the board has likely been modified or repaired, and confirm the identifiers before you order. If your project requires a new or unmodified board, keep looking; if you need a serviceable control board for a legacy system, this one is worth a closer look.
