Operating Principle & Precautions for Use Others Reliability Operating Principle & Precautions for Use Input condition What happen if high/low input frequency is applied? What is harmful effect of input line impedance? What is harmful effect of out of input voltage spec operation? Is it possible to use UPS as input source? Is it allowed to apply DC voltage to AC-DC unit? What is meaning of (L) and (N) on AC terminal? Is it possible to apply 400Hz input to AC-DC unit? Load condition How can pulse/peak current be drawn? How to read derating curve? Why does audible sound occur with pulse load? What is influence of back electromotive force from motor on PSU? Does rated power change when output voltage adjusted? EMC Where is noise sources and pathway in PSU? Noise (Emission/EMI) type and How to reduce? Noise (Immunity/EMS) type and How to protect? What is EMI filter recommended for DC-DC converter? Protection circuit What is Inrush current protection? How to protect DC-DC converter against reverse voltage? Attached function Show DC-DC converter application circuit How to use remote sensing in series/parallel connection? Others How to choose wiring cable? How much is the tightening torque? How to calculate calorific value? What does the content indicated on name plate mean? What action should be taken if internal fuse has blown out? Reliability What is expected life of Electrolytic capacitor? What is MTBF? How long is expected life time in FAN built-in PSU? How long is the storage limitation? What is harmful effect of out of ambient temperature spec operation?