Hi Charles, Thank you reply. You said I have miss understand, I got it. If I want to connect from -50V to VSUB, I have to short 1-2pins, right? If so, N502 is disconnected. And power sequence is same squence -50V -> +3.3V -> +1.8V -> +-5V -> +-10V -> +50V to squence +3.3V -> +1.8V -> +-5V -> +-10V -> +-50V? One more, for powering up, is it have to connect to FPGA? Regards, SungYun
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