Gepruft SL-L2/4 Circuit Board

Gepruft SL‑L2/4 is a compact PLC control board designed for machine‑control applications, featuring four 15/24 VDC relays and a standard PC board layout. Common failure modes in this class include relay contact wear or burn‑out, electrolytic capacitor degradation on the power‑supply section, and solder joint fatigue around the I/O headers. Initial diagnostics should verify that the board receives correct supply voltage (15–24 VDC), inspect for visible signs of component damage such as bulging capacitors or burnt traces, and check relay coil resistance against spec to rule out stuck contacts.[oss-gpt-20b]

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