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From 08:00 PM CDT Friday, August 12 - 01:00 PM CDT Saturday, August 13, ni.com will be undergoing system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
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背板的手册上介绍J2,J3,J4三个插针是连接温度传感器(负温度系数热敏电阻)的,用以监控板卡的温度,见图1,图2。热敏电阻型号为KWM502C,在25℃时电阻为5K,见图3,图4。推测此三个接线端若开路,则等效于温度不在正常范围内(温度过低),控制器无法启动且风扇不转。出于验证目的,在此三接线端上接入4.X K定值电阻,控制器正常启动。注意!此方法可能导致背板、板卡或控制器过热而无法被检测到!在实际使用中务必采用合规的热敏电阻。背板手册、热敏电阻手册在附件中。
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