The Carlo Gavazzi 509SZ012‑01 is a compact industrial power supply module used in open‑frame and DIN‑rail applications, typically providing up to 10 A at 24 VDC for control panels or servo drives. Common failure modes for this class include overheating of the internal switching regulator, failure of the output transformer winding, or degradation of the input/output capacitors due to vibration or thermal cycling. Initial checks should verify that the unit receives its rated AC input voltage and that the output voltage is within spec; inspect the board for burned components, cracked solder joints, or swollen electrolytic caps; and review any error logs from connected controllers for power‑supply related fault codes.[oss-gpt-20b]