{"id":1836,"date":"2018-12-19T02:05:16","date_gmt":"2018-12-19T02:05:16","guid":{"rendered":""},"modified":"2018-12-19T10:05:55","modified_gmt":"2018-12-19T02:05:55","slug":"%e9%87%87%e7%94%a84%7e20ma%e7%9a%84%e7%94%b5%e6%b5%81%e6%9d%a5%e4%bc%a0%e8%be%93%e6%a8%a1%e6%8b%9f%e9%87%8f%e7%9a%84%e6%a0%b9%e6%9c%ac%e5%8e%9f%e5%9b%a0","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=1836","title":{"rendered":"\u91c7\u75284~20mA\u7684\u7535\u6d41\u6765\u4f20\u8f93\u6a21\u62df\u91cf\u7684\u6839\u672c\u539f\u56e0"},"content":{"rendered":"
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\n\t\u5f53\u7136\uff0c\u7535\u6d41\u8f93\u51fa\u53ef\u4ee5\u4e0e\u7535\u6e90\u516c\u7528\u4e00\u6839\u7ebf\uff08\u516c\u7528VCC\u6216\u8005GND\uff09\uff0c\u53ef\u8282\u7701\u4e00\u6839\u7ebf\uff0c\u6240\u4ee5\u73b0\u5728\u57fa\u672c\u4e0a\u5c06\u56db\u7ebf\u5236\u53d8\u9001\u5668\u79f0\u4e4b\u4e3a\u4e09\u7ebf\u5236\u53d8\u9001\u5668\u3002\u5176\u5b9e\u5927\u5bb6\u53ef\u80fd\u6ce8\u610f\u5230\uff0c 4-20mA\u7535\u6d41\u672c\u8eab\u5c31\u53ef\u4ee5\u4e3a\u53d8\u9001\u5668\u4f9b\u7535\uff0c\u53d8\u9001\u5668\u5728\u7535\u8def\u4e2d\u76f8\u5f53\u4e8e\u4e00\u4e2a\u7279\u6b8a\u7684\u8d1f\u8f7d\uff0c\u8fd9\u79cd\u53d8\u9001\u5668\u53ea\u9700\u5916\u63a52\u6839\u7ebf\uff0c\u56e0\u800c\u88ab\u79f0\u4e3a\u4e24\u7ebf\u5236\u53d8\u9001\u5668\u3002\u5de5\u4e1a\u7535\u6d41\u73af\u6807\u51c6\u4e0b\u9650\u4e3a4mA\uff0c\u56e0\u6b64\u5728\u91cf\u7a0b\u8303\u56f4\u5185\uff0c\u53d8\u9001\u5668\u901a\u5e38\u53ea\u670924V\uff0c4mA\u4f9b\u7535\uff08\u56e0\u6b64\uff0c\u5728\u8f7b\u8d1f\u8f7d\u6761\u4ef6\u4e0b\u9ad8\u6548\u7387\u7684DC\/DC<\/u>\u7535\u6e90\uff08TPS54331,TPS54160\uff09\uff0c\u4f4e\u529f\u8017\u7684\u4f20\u611f\u5668<\/u>\u548c\u4fe1\u53f7\u94fe\u4ea7\u54c1\u3001\u4ee5\u53ca\u4f4e\u529f\u8017\u7684\u5904\u7406\u5668\uff08\u5982MSP430<\/u>\uff09\u5bf9\u4e8e\u4e24\u7ebf\u5236\u76844-20mA\u6536\u53d1\u975e\u5e38\u91cd\u8981\uff09\u3002\u8fd9\u4f7f\u5f97\u4e24\u7ebf\u5236\u4f20\u611f\u5668\u7684\u8bbe\u8ba1\u6210\u4e3a\u53ef\u80fd\u800c\u53c8\u5bcc\u6709\u6311\u6218\u3002<\/p>\n
\n\t\u4e00\u822c\u9700\u8981\u8bbe\u8ba1\u4e00\u4e2aVI\u8f6c\u6362\u5668\uff0c\u8f93\u51650-3.3v\uff0c\u8f93\u51fa4mA-20mA\uff0c\u53ef\u91c7\u7528\u8fd0\u653eLM358\uff0c\u4f9b\u7535+12v\u3002<\/p>\n
\n\t\u6211\u4eec\u7cfb\u7edf\u5730\u6765\u770b\u770b\u6a21\u62df\u91cf\u8bbe\u5907\u4e3a\u4ec0\u4e48\u90fd\u504f\u7231\u75284~20mA\u4f20\u8f93\u4fe1\u53f7~<\/p>\n
\n\t4-20mA. DC(1-5V.DC)\u4fe1\u53f7\u5236\u662f\u56fd\u9645\u7535\u5de5\u59d4\u5458\u4f1a( IEC )\u8fc7\u7a0b\u63a7\u5236\u7cfb\u7edf\u91c7\u7528\u7684\u6a21\u62df\u4fe1\u53f7\u4f20\u8f93\u6807\u51c6\u3002\u6211\u56fd\u4e5f\u91c7\u7528\u8fd9\u4e00\u56fd\u9645\u6807\u51c6\u4fe1\u53f7\u5236\uff0c\u4eea\u8868\u4f20\u8f93\u4fe1\u53f7\u91c7\u75284-20mA.DC\uff0c\u63a5\u6536\u4fe1\u53f7\u91c7\u75281-5V.DC\uff0c\u5373\u91c7\u7528\u7535\u6d41\u4f20\u8f93\u3001\u7535\u538b\u63a5\u6536\u7684\u4fe1\u53f7\u7cfb\u7edf\u3002<\/p>\n
\n\t\u4e00\u822c\u4eea\u5668\u4eea\u8868\u7684\u4fe1\u53f7\u7535\u6d41\u90fd\u4e3a4-20mA\uff0c\u6307\u6700\u5c0f\u7535\u6d41\u4e3a4mA,\u6700\u5927\u7535\u6d41\u4e3a20mA \u3002\u4f20\u8f93\u4fe1\u53f7\u65f6\u5019\uff0c\u56e0\u4e3a\u5bfc\u7ebf\u4e0a\u4e5f\u6709\u7535\u963b\uff0c\u5982\u679c\u7528\u7535\u538b\u4f20\u8f93\u5219\u4f1a\u5728\u5bfc\u7ebf\u5185\u4ea7\u751f\u4e00\u5b9a\u7684\u538b\u964d\uff0c\u90a3\u63a5\u6536\u7aef\u7684\u4fe1\u53f7\u5c31\u4f1a\u4ea7\u751f\u4e00\u5b9a\u7684\u8bef\u5dee\u4e86\uff0c\u6240\u4ee5\u4e00\u822c\u4f7f\u7528\u7535\u6d41\u4fe1\u53f7\u4f5c\u4e3a\u53d8\u9001\u5668\u7684\u6807\u51c6\u4f20\u8f93\u3002<\/p>\n
\n\t\u4ec0\u4e48\u662f4~20mA.DC\uff081~5V.DC\uff09\u4fe1\u53f7\u5236\uff1f<\/p>\n
\n\t4~20mA.DC\uff081~5V.DC\uff09\u4fe1\u53f7\u5236\u662f\u56fd\u9645\u7535\u5de5\u59d4\u5458\u4f1a\uff08IEC\uff09\uff1a\u8fc7\u7a0b\u63a7\u5236\u7cfb\u7edf\u7528\u6a21\u62df\u4fe1\u53f7\u6807\u51c6\u3002\u6211\u56fd\u4eceDDZ-\u2162\u578b\u7535\u52a8\u4eea\u8868\u5f00\u59cb\u91c7\u7528\u8fd9\u4e00\u56fd\u9645\u6807\u51c6\u4fe1\u53f7\u5236\uff0c\u4eea\u8868\u4f20\u8f93\u4fe1\u53f7\u91c7\u75284~20mA.DC\uff0c\u8054\u7edc\u4fe1\u53f7\u91c7\u75281~5V.DC\uff0c\u5373\u91c7\u7528\u7535\u6d41\u4f20\u8f93\u3001\u7535\u538b\u63a5\u6536\u7684\u4fe1\u53f7\u7cfb\u7edf\u3002<\/p>\n
\n\t4~20mA\u7535\u6d41\u73af\u5de5\u4f5c\u539f\u7406\uff1a<\/p>\n
\n\t<\/p>\n
\n\t<\/p>\n
\n\t<\/p>\n
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\n\t\u4e3a\u4e86\u89e3\u51b3\u4e0a\u8ff0\u95ee\u9898\u548c\u907f\u5f00\u76f8\u5173\u566a\u58f0\u7684\u5f71\u54cd\uff0c\u6211\u4eec\u7528\u7535\u6d41\u6765\u4f20\u8f93\u4fe1\u53f7\uff0c\u56e0\u4e3a\u7535\u6d41\u5bf9\u566a\u58f0\u5e76\u4e0d\u654f\u611f\u30024\uff5e20mA\u7684\u7535\u6d41\u73af\u4fbf\u662f\u75284mA\u8868\u793a\u96f6\u4fe1\u53f7\uff0c\u752820mA\u8868\u793a\u4fe1\u53f7\u7684\u6ee1\u523b\u5ea6\uff0c\u800c\u4f4e\u4e8e4mA\u9ad8\u4e8e20mA\u7684\u4fe1\u53f7\u7528\u4e8e\u5404\u79cd\u6545\u969c\u7684\u62a5\u8b66\u3002<\/p>\n
\n\t4~20mA.DC\uff081~5V.DC\uff09\u4fe1\u53f7\u5236\u7684\u4f18\u70b9\uff1f<\/p>\n
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\n\t\u63a7\u5236\u5ba4\u4eea\u8868\u91c7\u7528\u7535\u538b\u5e76\u8054\u4fe1\u53f7\u4f20\u8f93\uff0c\u540c\u4e00\u4e2a\u63a7\u5236\u7cfb\u7edf\u6240\u5c5e\u7684\u4eea\u8868\u4e4b\u95f4\u6709\u516c\u5171\u7aef\uff0c\u4fbf\u4e8e\u68c0\u6d4b\u4eea\u8868\u3001\u8c03\u8282\u4eea\u8868\u3001\u8ba1\u7b97\u673a\u3001\u62a5\u8b66\u88c5\u7f6e\u914d\u7528\uff0c\u5e76\u65b9\u4fbf\u63a5\u7ebf\u3002<\/p>\n
\n\t\u73b0\u573a\u4eea\u8868\u4e0e\u63a7\u5236\u5ba4\u4eea\u8868\u4e4b\u95f4\u7684\u8054\u7edc\u4fe1\u53f7\u91c7\u75284~20mA.DC\u7684\u7406\u7531\u662f\uff1a\u56e0\u4e3a\u73b0\u573a\u4e0e\u63a7\u5236\u5ba4\u4e4b\u95f4\u7684\u8ddd\u79bb\u8f83\u8fdc\uff0c\u8fde\u63a5\u7535\u7ebf\u7684\u7535\u963b\u8f83\u5927\uff0c\u5982\u679c\u7528\u7535\u538b\u4fe1\u53f7\u8fdc\u4f20\uff0c\u4f18\u4e8e\u7535\u7ebf\u7535\u963b\u4e0e\u63a5\u6536\u4eea\u8868\u8f93\u5165\u7535\u963b\u7684\u5206\u538b\uff0c\u5c06\u4ea7\u751f\u8f83\u5927\u7684\u8bef\u5dee\uff0c\u800c\u7528\u6052\u6d41\u6e90\u4fe1\u53f7\u4f5c\u4e3a\u8fdc\u4f20\uff0c\u53ea\u8981\u4f20\u9001\u56de\u8def\u4e0d\u51fa\u73b0\u5206\u652f\uff0c\u56de\u8def\u4e2d\u7684\u7535\u6d41\u5c31\u4e0d\u4f1a\u968f\u7535\u7ebf\u957f\u77ed\u800c\u6539\u53d8\uff0c\u4ece\u800c\u4fdd\u8bc1\u4e86\u4f20\u9001\u7684\u7cbe\u5ea6\u3002<\/p>\n
\n\t\u63a7\u5236\u5ba4\u4eea\u8868\u4e4b\u95f4\u7684\u8054\u7edc\u4fe1\u53f7\u91c7\u75281~5V.DC\u7406\u7531\u662f\uff1a\u4e3a\u4e86\u4fbf\u4e8e\u591a\u53f0\u4eea\u8868\u5171\u540c\u63a5\u6536\u540c\u4e00\u4e2a\u4fe1\u53f7\uff0c\u5e76\u6709\u5229\u4e8e\u63a5\u7ebf\u548c\u6784\u6210\u5404\u79cd\u590d\u6742\u7684\u63a7\u5236\u7cfb\u7edf\u3002\u5982\u679c\u7528\u7535\u6d41\u6e90\u4f5c\u8054\u7edc\u4fe1\u53f7\uff0c\u5f53\u591a\u53f0\u4eea\u8868\u5171\u540c\u63a5\u6536\u540c\u4e00\u4e2a\u4fe1\u53f7\u65f6\uff0c\u5b83\u4eec\u7684\u8f93\u5165\u7535\u963b\u5fc5\u987b\u4e32\u8054\u8d77\u6765\uff0c\u8fd9\u4f1a\u4f7f\u6700\u5927\u8d1f\u8f7d\u7535\u963b\u8d85\u8fc7\u53d8\u9001\u4eea\u8868\u7684\u8d1f\u8f7d\u80fd\u529b\uff0c\u800c\u4e14\u5404\u63a5\u6536\u4eea\u8868\u7684\u4fe1\u53f7\u8d1f\u7aef\u7535\u4f4d\u5404\u4e0d\u76f8\u540c\uff0c\u4f1a\u5f15\u5165\u5e72\u6270\uff0c\u800c\u4e14\u4e0d\u80fd\u505a\u5230\u5355\u4e00\u96c6\u4e2d\u4f9b\u7535\u3002<\/p>\n
\n\t\u91c7\u7528\u7535\u538b\u6e90\u4fe1\u53f7\u8054\u7edc\uff0c\u4e0e\u73b0\u573a\u4eea\u8868\u7684\u8054\u7edc\u7528\u7684\u7535\u6d41\u4fe1\u53f7\u5fc5\u987b\u8f6c\u6362\u4e3a\u7535\u538b\u4fe1\u53f7\uff0c\u6700\u7b80\u5355\u7684\u529e\u6cd5\u5c31\u662f\uff1a\u5728\u7535\u6d41\u4f20\u9001\u56de\u8def\u4e2d\u4e32\u8054\u4e00\u4e2a250Ω\u7684\u6807\u51c6\u7535\u963b\uff0c\u628a4~20mA.DC\u8f6c\u6362\u4e3a1~5V.DC\uff0c\u901a\u5e38\u7531\u914d\u7535\u5668\u6765\u5b8c\u6210\u8fd9\u4e00\u4efb\u52a1\u3002<\/p>\n
\n\t\u53d8\u9001\u5668\u9009\u62e94~20mA.DC\u4f5c\u4f20\u9001\u4fe1\u53f7\uff1f<\/p>\n
\n\t1\u3001\u9996\u5148\u662f\u4ece\u73b0\u573a\u5e94\u7528\u7684\u5b89\u5168\u8003\u8651<\/p>\n
\n\t\u5b89\u5168\u91cd\u70b9\u662f\u4ee5\u9632\u7206\u5b89\u5168\u706b\u82b1\u578b\u4eea\u8868\u6765\u8003\u8651\u7684\uff0c\u5e76\u4ee5\u63a7\u5236\u4eea\u8868\u80fd\u91cf\u4e3a\u524d\u63d0\uff0c\u628a\u7ef4\u6301\u4eea\u8868\u6b63\u5e38\u5de5\u4f5c\u7684\u9759\u6001\u548c\u52a8\u6001\u529f\u8017\u964d\u4f4e\u5230\u6700\u4f4e\u9650\u5ea6\u3002\u8f93\u51fa4~20mA.DC\u6807\u51c6\u4fe1\u53f7\u7684\u53d8\u9001\u5668\uff0c\u5176\u7535\u6e90\u7535\u538b\u901a\u5e38\u91c7\u752824V.DC\uff0c\u91c7\u7528\u76f4\u6d41\u7535\u538b\u7684\u4e3b\u8981\u539f\u56e0\u662f\u53ef\u4ee5\u4e0d\u7528\u5927\u5bb9\u91cf\u7684\u7535\u5bb9\u5668<\/u>\u53ca\u7535\u611f\u5668<\/u>\uff0c\u5c31\u53ea\u9700\u8003\u8651\u53d8\u9001\u5668\u4e0e\u63a7\u5236\u5ba4\u4eea\u8868\u8fde\u63a5\u5bfc\u7ebf\u7684\u5206\u5e03\u7535\u5bb9<\/u>\u53ca\u7535\u611f\uff0c\u59822mm2 \u7684\u5bfc\u7ebf\u5176\u5206\u5e03\u7535\u5bb9\u4e3a0.05μ\/km\u5de6\u53f3\uff1b\u5bf9\u4e8e\u5355\u7ebf\u7684\u7535\u611f\u4e3a0.4mH\/km\u5de6\u53f3\uff1b\u5927\u5927\u4f4e\u4e8e\u5f15\u7206\u6c22\u6c14\u7684\u6570\u503c\uff0c\u663e\u7136\u8fd9\u5bf9\u9632\u7206\u662f\u975e\u5e38\u6709\u5229\u7684\u3002<\/p>\n
\n\t2\u3001\u4f20\u9001\u4fe1\u53f7\u7528\u7535\u6d41\u6e90\u4f18\u4e8e\u7535\u538b\u6e90<\/p>\n
\n\t\u56e0\u4e3a\u73b0\u573a\u4e0e\u63a7\u5236\u5ba4\u4e4b\u95f4\u7684\u8ddd\u79bb\u8f83\u8fdc\uff0c\u8fde\u63a5\u7535\u7ebf\u7684\u7535\u963b\u8f83\u5927\u65f6\uff0c\u5982\u679c\u7528\u7535\u538b\u6e90\u4fe1\u53f7\u8fdc\u4f20\uff0c\u7531\u4e8e\u7535\u7ebf\u7535\u963b\u4e0e\u63a5\u6536\u4eea\u8868\u8f93\u5165\u7535\u963b\u7684\u5206\u538b\uff0c\u5c06\u4ea7\u751f\u8f83\u5927\u7684\u8bef\u5dee\uff0c\u5982\u679c\u7528\u7535\u6d41\u6e90\u4fe1\u53f7\u4f5c\u4e3a\u8fdc\u4f20\uff0c\u53ea\u8981\u4f20\u9001\u56de\u8def\u4e0d\u51fa\u73b0\u5206\u652f\uff0c\u56de\u8def\u4e2d\u7684\u7535\u6d41\u5c31\u4e0d\u4f1a\u968f\u7535\u7ebf\u957f\u77ed\u800c\u6539\u53d8\uff0c\u4ece\u800c\u4fdd\u8bc1\u4e86\u4f20\u9001\u7684\u7cbe\u5ea6\u3002<\/p>\n
\n\t3\u3001\u4fe1\u53f7\u6700\u5927\u7535\u6d41\u9009\u62e920mA\u7684\u539f\u56e0<\/p>\n
\n\t\u6700\u5927\u7535\u6d4120mA\u7684\u9009\u62e9\u662f\u57fa\u4e8e\u5b89\u5168\u3001\u5b9e\u7528\u3001\u529f\u8017\u3001\u6210\u672c\u7684\u8003\u8651\u3002\u5b89\u5168\u706b\u82b1\u4eea\u8868\u53ea\u80fd\u91c7\u7528\u4f4e\u7535\u538b\u3001\u4f4e\u7535\u6d41\uff0c4~20mA\u7535\u6d41\u548c24V.DC\u5bf9\u6613\u71c3\u6c22\u6c14\u4e5f\u662f\u5b89\u5168\u7684\uff0c\u5bf9\u4e8e24V.DC\u6c22\u6c14\u7684\u5f15\u7206\u7535\u6d41\u4e3a200mA\uff0c\u8fdc\u572820mA\u4ee5\u4e0a\uff0c\u6b64\u5916\u8fd8\u8981\u7efc\u5408\u8003\u8651\u751f\u4ea7\u73b0\u573a\u4eea\u8868\u4e4b\u95f4\u7684\u8fde\u63a5\u8ddd\u79bb\uff0c\u6240\u5e26\u8d1f\u8f7d\u7b49\u56e0\u7d20\uff1b\u8fd8\u6709\u529f\u8017\u53ca\u6210\u672c\u95ee\u9898\uff0c\u5bf9\u7535\u5b50\u5143\u4ef6\u7684\u8981\u6c42\uff0c\u4f9b\u7535\u529f\u7387\u7684\u8981\u6c42\u7b49\u56e0\u7d20\u3002<\/p>\n
\n\t4\u3001\u4fe1\u53f7\u8d77\u70b9\u7535\u6d41\u9009\u62e94mA\u7684\u539f\u56e0<\/p>\n
\n\t\u8f93\u51fa\u4e3a4~20mA\u7684\u53d8\u9001\u5668\u4ee5\u4e24\u7ebf\u5236\u7684\u5c45\u591a\uff0c\u4e24\u7ebf\u5236\u5373\u7535\u6e90\u3001\u8d1f\u8f7d\u4e32\u8054\u5728\u4e00\u8d77\uff0c\u6709\u4e00\u516c\u5171\u70b9\uff0c\u800c\u73b0\u573a\u53d8\u9001\u5668\u4e0e\u63a7\u5236\u5ba4\u4eea\u8868\u4e4b\u95f4\u7684\u4fe1\u53f7\u8054\u7edc\u53ca\u4f9b\u7535\u4ec5\u7528\u4e24\u6839\u7535\u7ebf\u3002\u4e3a\u4ec0\u4e48\u8d77\u70b9\u4fe1\u53f7\u4e0d\u662f0mA\uff1f\u8fd9\u662f\u57fa\u4e8e\u4e24\u70b9\uff1a\u4e00\u662f\u53d8\u9001\u5668\u7535\u8def\u6ca1\u6709\u9759\u6001\u5de5\u4f5c\u7535\u6d41\u5c06\u65e0\u6cd5\u5de5\u4f5c\uff0c\u4fe1\u53f7\u8d77\u70b9\u7535\u6d414mA.DC\uff0c\u4e0d\u4e0e\u673a\u68b0\u96f6\u70b9\u91cd\u5408\uff0c\u8fd9\u79cd“\u6d3b\u96f6\u70b9”\u6709\u5229\u4e8e\u8bc6\u522b\u65ad\u7535\u548c\u65ad\u7ebf\u7b49\u6545\u969c\u3002<\/p>\n
\n\t4~20mA\u4f20\u611f\u5668\u7684\u7531\u6765\uff1f<\/p>\n
\n\t\u91c7\u7528\u7535\u6d41\u4fe1\u53f7\u7684\u539f\u56e0\u662f\u4e0d\u5bb9\u6613\u53d7\u5e72\u6270\u3001\u5e76\u4e14\u7535\u6d41\u6e90\u5185\u963b\u65e0\u7a77\u5927\uff0c\u5bfc\u7ebf\u7535\u963b\u4e32\u8054\u5728\u56de\u8def\u4e2d\u4e0d\u5f71\u54cd\u7cbe\u5ea6\uff0c\u5728\u666e\u901a\u53cc\u7ede\u7ebf\u4e0a\u53ef\u4ee5\u4f20\u8f93\u6570\u767e\u7c73\u3002<\/p>\n
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