{"id":21388,"date":"2023-08-02T21:10:18","date_gmt":"2023-08-02T13:10:18","guid":{"rendered":"https:\/\/www.modbus.cn\/?p=21388"},"modified":"2026-07-01T00:12:28","modified_gmt":"2026-06-30T16:12:28","slug":"rs-485-shou-fa-qi-nan-ti-xiang-jie","status":"publish","type":"post","link":"https:\/\/www.modbus.cn\/en\/21388.html","title":{"rendered":"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3"},"content":{"rendered":"<p><strong>1.\u00a0\u00a0\u00a0\u00a0\u4f55\u65f6\u9700\u8981\u5728RS-485\u603b\u7ebf\u4e0a\u7aef\u63a5\uff0c\u4ee5\u53ca\u5982\u4f55\u6b63\u786e\u7aef\u63a5\uff1f<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>RS-485\u603b\u7ebf\u7aef\u63a5\u5728\u8bb8\u591a\u5e94\u7528\u4e2d\u5747\u5f88\u6709\u7528\uff0c\u56e0\u4e3a\u6b64\u65b9\u5f0f\u6709\u52a9\u4e8e\u63d0\u9ad8\u4fe1\u53f7\u5b8c\u6574\u6027\u5e76\u51cf\u5c11\u901a\u4fe1\u95ee\u9898\u3002\u201c\u7aef\u63a5\u201d\u662f\u6307\u5c06\u7535\u7f06\u7684\u7279\u5f81\u963b\u6297\u4e0e\u7aef\u63a5\u7f51\u7edc\u5339\u914d\uff0c\u4f7f\u603b\u7ebf\u672b\u7aef\u7684\u63a5\u6536\u5668\u80fd\u591f\u89c2\u5bdf\u5230\u6700\u5927\u4fe1\u53f7\u529f\u7387\u3002\u672a\u7aef\u63a5\u6216\u7aef\u63a5\u4e0d\u5f53\u7684\u603b\u7ebf\u5c06\u65e0\u6cd5\u5f88\u597d\u7684\u5339\u914d\uff0c\u4ece\u800c\u5728\u7f51\u7edc\u672b\u7aef\u4ea7\u751f\u53cd\u5c04\uff0c\u5bfc\u81f4\u6574\u4f53\u4fe1\u53f7\u5b8c\u6574\u6027\u964d\u4f4e\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u7f51\u7edc\u7684\u53cc\u5411\u73af\u8def\u65f6\u95f4\u8fdc\u5927\u4e8e\u4fe1\u53f7\u4f4d\u65f6\u95f4\u65f6\uff0c\u65e0\u9700\u7ec8\u6b62\uff0c\u56e0\u4e3a\u6bcf\u6b21\u53cd\u5c04\u5230\u8fbe\u7f51\u7edc\u672b\u7aef\u65f6\uff0c\u5b83\u4eec\u90fd\u4f1a\u635f\u5931\u80fd\u91cf\u3002\u4f46\u662f\uff0c\u5bf9\u4e8e\u4f4d\u65f6\u95f4\u57fa\u672c\u4e0a\u4e0d\u957f\u4e8e\u7535\u7f06\u73af\u8def\u65f6\u95f4\u7684\u5e94\u7528\uff0c\u4e3a\u4f7f\u53cd\u5c04\u6700\u5c0f\u5316\uff0c\u7aef\u63a5\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6700\u57fa\u672c\u7684\u7aef\u63a5\u79f0\u4e3a\u5e76\u8054\u7aef\u63a5\uff0c\u7531\u5355\u4e2a\u7535\u963b\u7ec4\u6210\uff0c\u5982\u56fe1\u6240\u793a\u3002RS-485\u6807\u51c6\u8981\u6c42\u6807\u79f0\u7279\u6027\u963b\u6297\u8fbe\u5230120\u03a9\uff0c\u56e0\u6b64\u7aef\u63a5\u7535\u963b\u7684\u9ed8\u8ba4\u503c\u5e94\u4e3aRT = 120\u03a9\u3002\u9605\u8bfb\u535a\u6587\uff1a\u201cRS-485\u57fa\u7840\uff1a\u4ec0\u4e48\u65f6\u5019\u9700\u8981\u7aef\u63a5\uff0c\u4ee5\u53ca\u5982\u4f55\u6b63\u786e\u6267\u884c\u3002\u201d<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211019503.png\" rel=\"noopener noreferrer nofollow lightbox-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211019503.png\" width=\"599\" height=\"204\" \/ loading=\"lazy\" title=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe\" alt=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u56fe1\uff1a\u5177\u6709\u5e76\u8054\u7aef\u63a5\u7684RS-485\u603b\u7ebf<\/p>\n<p>&nbsp;<\/p>\n<p><strong>2.\u00a0\u00a0\u00a0\u00a0\u4ec0\u4e48\u662f\u6545\u969c\u5b89\u5168\u504f\u7f6e\uff0c\u5982\u4f55\u5b9e\u73b0\uff1f<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>\u6545\u969c\u5b89\u5168\u504f\u7f6e\u662f\u786e\u4fddRS-485\u63a5\u6536\u5668\u4e0d\u4f1a\u56e0\u5dee\u5206\u8f93\u5165\u7535\u538b\u800c\u5904\u4e8e\u4e0d\u786e\u5b9a\u72b6\u6001\u7684\u4e00\u79cd\u65b9\u5f0f\u3002\u7535\u5b50\u5de5\u4e1a\u8054\u76df\uff08EIA\uff09-485\u6807\u51c6\u6307\u51fa\uff1a\u5f53\u5dee\u5206\u7535\u538b\u2265+ 200mV\u65f6\uff0cRS-485\u7684\u8f93\u5165\u9608\u503c\u662f\u903b\u8f91\u9ad8\uff1b\u5dee\u5206\u7535\u538b\u2264-200mV\u65f6\uff0cRS-485\u7684\u8f93\u5165\u9608\u503c\u662f\u903b\u8f91\u4f4e\uff0c\u4ece\u800c\u5728\u9ad8\u4f4e\u9608\u503c\u4e4b\u95f4\u4fdd\u6301400mV\u7684\u4e0d\u786e\u5b9a\u72b6\u6001\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u53ef\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\u5b9e\u73b0\u6545\u969c\u5b89\u5168\u504f\u7f6e\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>l\u00a0\u00a0\u9009\u62e9\u5728\u63a5\u6536\u5668\u4e2d\u5177\u6709\u5185\u7f6e\u6545\u969c\u5b89\u5168\u8f93\u5165\u9608\u503c\u7684\u6536\u53d1\u5668\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>l\u00a0\u00a0\u6dfb\u52a0\u5916\u90e8\u7535\u963b\uff0c\u4ee5\u5728\u7a7a\u8f7d\u603b\u7ebf\u4e0a\u4ea7\u751f\u5916\u90e8\u504f\u7f6e\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e24\u79cd\u65b9\u6cd5\u90fd\u53ef\u4ee5\u786e\u4fdd\u603b\u7ebf\u4e0a\u7684\u903b\u8f91\u9ad8\u72b6\u6001\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>3.\u00a0\u00a0\u00a0\u00a0\u5982\u4f55\u8ba1\u7b97RS-485\u603b\u7ebf\u4e0a\u7684\u6700\u5927\u8282\u70b9\u6570\uff1f<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>RS-485\u662f\u591a\u70b9\u5dee\u5206\u603b\u7ebf\uff0c\u610f\u5473\u7740\u603b\u7ebf\u4e0a\u7684\u6240\u6709\u8282\u70b9\u90fd\u5171\u4eab\u4e00\u4e2a\u516c\u5171\u4f20\u8f93\u4ecb\u8d28\u3002\u968f\u7740\u8282\u70b9\u603b\u6570\u589e\u52a0\uff0c\u6bcf\u4e2a\u9a71\u52a8\u5668\u4e0a\u7684\u8d1f\u8f7d\u4e5f\u5c06\u968f\u4e4b\u589e\u52a0\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7535\u4fe1\u884c\u4e1a\u534f\u4f1a\uff08TIA\uff09\/ EIA-485\u6807\u51c6\u521b\u5efa\u4e86\u4e00\u4e2a\u5047\u8bbe\u7684\u5355\u4f4d\u8d1f\u8f7d\uff08UL\uff09\uff0c\u4ee5\u5e2e\u52a9\u8ba1\u7b97RS-485\u603b\u7ebf\u4e0a\u7684\u6700\u5927\u8282\u70b9\u6570\u3002\u8be5\u6807\u51c6\u89c4\u5b9a\uff1a\u9a71\u52a8\u5668\u5fc5\u987b\u80fd\u591f\u5728\u6700\u591a32\u4e2a\u5355\u5143\u8d1f\u8f7d\u4e0a\u5e76\u884c\u9a71\u52a8\u81f3\u5c111.5V\u5dee\u5206\u4fe1\u53f7\uff0c\u5e76\u5728\u603b\u7ebf\u7684\u4e24\u7aef\u5206\u522b\u8fde\u63a5\u4e24\u4e2a120\u03a9\u7ec8\u7aef\u7535\u963b\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u516c\u5f0f1\u8868\u793a\u8f93\u5165\u7535\u538b\u9664\u4ee5\u6f0f\u7535\u7535\u6d41\u540e\u6700\u574f\u60c5\u51b5\u4e0b\u7684\u6bd4\u503c\u6765\u8ba1\u7b97\u8f93\u5165\u7535\u963b\u3002\u5728\u786e\u5b9a\u4e86\u8282\u70b9\u7684\u8f93\u5165\u7535\u963b\u540e\uff0c\u53ef\u4f7f\u7528\u516c\u5f0f2\u8ba1\u7b97RS-485\u603b\u7ebf\u4e0a\u7684\u6700\u5927\u8282\u70b9\u6570\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>\u8f93\u5165\u7535\u963b=\u6700\u5927\uff08VIN\/Ileakage\uff09\u00a0\u00a0\u00a0\u00a0\u00a0\uff081\uff09<\/p>\n<p>&nbsp;<\/p>\n<p>\u8282\u70b9\u6570= 32 \/\u8f93\u5165\u7535\u963b\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\uff082\uff09<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong>4.\u00a0\u00a0\u00a0\u00a0\u5982\u4f55\u4e86\u5728\u6070\u5f53\u65f6\u95f4\u9700\u8981\u5728\u8282\u70b9\u4e4b\u95f4\u6dfb\u52a0\u4e00\u6839\u5730\u7ebf\uff1f<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>\u8bbe\u8ba1\u8fdc\u7a0b\u6570\u636e\u94fe\u8def\u65f6\uff0c\u5fc5\u987b\u5047\u8bbe\u5b58\u5728\u4e00\u4e9b\u63a5\u5730\u7535\u4f4d\u5dee\u3002\u8fd9\u4e9b\u7535\u538b\u4f1a\u7ed9\u53d1\u5c04\u673a\u8f93\u51fa\u589e\u52a0\u5171\u6a21\u566a\u58f0Vn\u3002\u5373\u4f7f\u603b\u53e0\u52a0\u4fe1\u53f7\u5904\u5728\u63a5\u6536\u673a\u7684\u8f93\u5165\u5171\u6a21\u8303\u56f4\u5185\uff0c\u4f9d\u9760\u5f53\u5730\u7684\u5730\u7535\u4f4d\u5dee\u4f5c\u4e3a\u8fd4\u56de\u7535\u6d41\u7684\u53ef\u9760\u8def\u5f84\u4e5f\u662f\u4e0d\u5b89\u5168\u7684\u3002\u63a5\u5730\u7535\u4f4d\u5dee\uff08GPD\uff09\u8d85\u51fa\u63a5\u6536\u5668\u7684\u5171\u6a21\u8303\u56f4\u65f6\uff08\u5728\u957f\u7535\u7f06\u548c\u5927\u7535\u6d41\u8d1f\u8f7d\u7684\u60c5\u51b5\u4e0b\u7ecf\u5e38\u53d1\u751f\uff09\uff0c\u9700\u8981\u4f7f\u7528\u9002\u5f53\u7684\u63a5\u5730\u6280\u672f\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211019771.png\" rel=\"noopener noreferrer nofollow lightbox-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211019771.png\"  width=\"538\" height=\"86\" \/ loading=\"lazy\" title=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe1\" alt=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe1\" \/><\/a><a href=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211020793.png\" rel=\"noopener noreferrer nofollow lightbox-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211020793.png\" width=\"599\" height=\"238\" \/ loading=\"lazy\" title=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe2\" alt=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe2\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u56fe2\uff1a\u8fdc\u7a0b\u8282\u70b9\u914d\u7f6e\uff1a\u72ec\u7acb\u7684\u63a5\u5730\u70b9\uff08a\uff09\uff1b\u76f4\u63a5\u8fde\u63a5\u7684\u8fdc\u7a0b\u63a5\u5730\uff08b\uff09\uff1b<\/p>\n<p>&nbsp;<\/p>\n<p>\u5668\u4ef6\u63a5\u5730\u548c\u672c\u5730\u7cfb\u7edf\u63a5\u5730\u7684\u5206\u79bb\uff08c\uff09<\/p>\n<p>&nbsp;<\/p>\n<p>\u56fe2a\u6240\u793a\u4e3a\u53ef\u80fd\u4ece\u7535\u6c14\u5b89\u88c5\u7684\u4e0d\u540c\u90e8\u5206\u6c72\u53d6\u529f\u7387\u7684\u8fdc\u7a0b\u8282\u70b9\u3002\u5bf9\u5b89\u88c5\u7684\u4efb\u4f55\u53d8\u52a8\uff08\u4f8b\u5982\u5728\u7ef4\u62a4\u5de5\u4f5c\u671f\u95f4\uff09\u5747\u53ef\u5c06GPD\u4ee5\u81f3\u4e8e\u8d85\u51fa\u63a5\u6536\u5668\u7684\u8f93\u5165\u5171\u6a21\u8303\u56f4\u7684\u7a0b\u5ea6\u3002\u56e0\u6b64\u53ef\u80fd\u4f1a\u5bfc\u81f4\u76ee\u524d\u6b63\u5de5\u4f5c\u7684\u6570\u636e\u94fe\u8def\u5c06\u6765\u505c\u6b62\u8fd0\u884c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e5f\u4e0d\u5efa\u8bae\u901a\u8fc7\u63a5\u5730\u7ebf\u76f4\u63a5\u8fde\u63a5\u8fdc\u7a0b\u63a5\u5730\uff08\u56fe2b\uff09\uff0c\u56e0\u4e3a\u76f4\u63a5\u8fde\u63a5\u4f1a\u5bfc\u81f4\u5927\u7684\u63a5\u5730\u56de\u8def\u7535\u6d41\u4f5c\u4e3a\u5171\u6a21\u566a\u58f0\u8026\u5408\u5230\u6570\u636e\u7ebf\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4e3a\u5b9e\u73b0\u8fdc\u7a0b\u63a5\u5730\u7684\u76f4\u63a5\u8fde\u63a5\uff0cRS-485\u6807\u51c6\u5efa\u8bae\u901a\u8fc7\u63d2\u5165\u7535\u963b\u5668\u5c06\u8bbe\u5907\u63a5\u5730\u4e0e\u672c\u5730\u7cfb\u7edf\u63a5\u5730\u5206\u5f00\uff08\u56fe2c\uff09\u3002\u867d\u7136\u8fd9\u79cd\u65b9\u6cd5\u964d\u4f4e\u4e86\u73af\u8def\u7535\u6d41\uff0c\u4f46\u7531\u4e8e\u5b58\u5728\u4e00\u4e2a\u5927\u63a5\u5730\u73af\u8def\u4f7f\u6570\u636e\u94fe\u8def\u5bf9\u73af\u8def\u5176\u4ed6\u5730\u65b9\u4ea7\u751f\u7684\u566a\u58f0\u4fdd\u6301\u654f\u611f\u3002\u56e0\u6b64\uff0c\u5c1a\u672a\u5efa\u7acb\u7a33\u5b9a\u7684\u6570\u636e\u94fe\u8def\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u8981\u5728\u5f3a\u5065\u7684RS-485\u6570\u636e\u94fe\u8def\u4e0a\u8fdc\u8ddd\u79bb\u627f\u53d7\u9ad8\u8fbe\u6570\u5343\u4f0f\u7684GPD\uff0c\u6700\u4f73\u65b9\u6cd5\u662f\u5c06\u603b\u7ebf\u6536\u53d1\u5668\u7684\u4fe1\u53f7\u548c\u7535\u6e90\u7ebf\u4e0e\u5176\u672c\u5730\u4fe1\u53f7\u548c\u7535\u6e90\u8fdb\u884c\u7535\u6d41\u9694\u79bb\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7535\u6e90\u9694\u79bb\u5668\uff08\u4f8b\u5982\u9694\u79bb\u7684DC \/ DC\u8f6c\u6362\u5668\uff09\u548c\u4fe1\u53f7\u9694\u79bb\u5668\uff08\u4f8b\u5982\u6570\u5b57\u7535\u5bb9\u9694\u79bb\u5668\uff09\u53ef\u9632\u6b62\u7535\u6d41\u5728\u8fdc\u7a0b\u7cfb\u7edf\u63a5\u5730\u4e4b\u95f4\u6d41\u52a8\uff0c\u5e76\u907f\u514d\u4ea7\u751f\u7535\u6d41\u73af\u8def\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>5.\u00a0\u00a0\u00a0\u00a0RS-485\u7684\u957f\u5ea6\u4e0e\u901f\u5ea6\u5efa\u8bae\u503c\u662f\u591a\u5c11\uff1f<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u989d\u5b9a\u7684\u6570\u636e\u901f\u7387\u4e0b\uff0c\u6700\u5927\u603b\u7ebf\u957f\u5ea6\u53d7\u9650\u4e8e\u4f20\u8f93\u7ebf\u635f\u8017\u548c\u4fe1\u53f7\u6296\u52a8\u3002\u7531\u4e8e\u5728\u6ce2\u7279\u7387\u4e3a10\uff05\u6216\u4ee5\u4e0a\u7684\u6296\u52a8\uff0c\u6570\u636e\u53ef\u9760\u6027\u6025\u5267\u4e0b\u964d\uff0c\u56e0\u6b64\u56fe3\u6240\u793a\u4e3a\u4f20\u7edfRS-485\u7535\u7f06\u5728\u4fe1\u53f7\u6296\u52a810%\u7684\u60c5\u51b5\u4e0b\u7684\u7535\u7f06\u957f\u5ea6\u4e0e\u6570\u636e\u901f\u7387\u7279\u6027\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211020224.png\" rel=\"noopener noreferrer nofollow lightbox-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211020224.png\"  width=\"249\" height=\"221\" \/ loading=\"lazy\" title=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe3\" alt=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe3\" \/><\/a><a href=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211021586.png\" rel=\"noopener noreferrer nofollow lightbox-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211021586.png\" width=\"300\" height=\"260\" \/ loading=\"lazy\" title=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe4\" alt=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe4\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u56fe3\uff1a\u7535\u7f06\u957f\u5ea6\u4e0e\u6570\u636e\u901f\u7387\u5efa\u8bae<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u56fe3\u4e0a\uff0c\u6807\u67091\u53f7\u7684\u5706\u5708\u4ee3\u8868\u7535\u7f06\u957f\u5ea6\u8f83\u77ed\u65f6\u7684\u9ad8\u6570\u636e\u901f\u7387\u533a\u57df\u3002\u6b64\u5904\uff0c\u53ef\u5ffd\u7565\u4f20\u8f93\u7ebf\u7684\u635f\u8017\u3002\u6570\u636e\u901f\u7387\u4e3b\u8981\u53d6\u51b3\u4e8e\u9a71\u52a8\u5668\u7684\u4e0a\u5347\u65f6\u95f4\u3002\u5c3d\u7ba1\u8be5\u6807\u51c6\u5efa\u8bae\u4f7f\u752810 Mbps\uff0c\u4f46\u5982\u4eca\u7684\u5feb\u901f\u63a5\u53e3\u7535\u8def\u53ef\u4ee5\u9ad8\u8fbe50 Mbps\u7684\u6570\u636e\u901f\u7387\u8fd0\u884c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u56fe3\u4e2d\u7684\u7ea2\u82722\u53f7\u4ee3\u8868\u4ece\u77ed\u6570\u636e\u7ebf\u5230\u957f\u6570\u636e\u7ebf\u7684\u8fc7\u6e21\u3002\u5fc5\u987b\u8003\u8651\u8f83\u957f\u4f20\u8f93\u7ebf\u7684\u635f\u8017\u3002\u56e0\u6b64\uff0c\u968f\u7740\u7535\u7f06\u957f\u5ea6\u7684\u589e\u52a0\uff0c\u6570\u636e\u901f\u7387\u5fc5\u987b\u964d\u4f4e\u3002\u6839\u636e\u7ecf\u9a8c\uff0c\u7ebf\u8def\u957f\u5ea6[m]\u4e0e\u6570\u636e\u901f\u7387[bps]\u7684\u4e58\u79ef\u5e94\u4e3a107\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7ea2\u8272\u76843\u4ee3\u8868\u4f4e\u9891\u8303\u56f4\uff0c\u5176\u4e2d\u7535\u7f06\u4e32\u8054\u7535\u963b\u548c\u7ebf\u8def\u7aef\u63a5\u7684\u76f8\u4e92\u4f5c\u7528\u4f1a\u5bfc\u81f4\u4fe1\u53f7\u8870\u51cf\u3002\u5728\u67d0\u4e2a\u70b9\uff0c\u4fe1\u53f7\u7684\u632f\u5e45\u53d8\u5f97\u6bd4\u63a5\u6536\u673a\u80fd\u591f\u6b63\u5e38\u68c0\u6d4b\u5230\u7684\u5e45\u5ea6\u8981\u5c0f\uff08\u5373\u4e0d\u8d85\u8fc7VIT\u9608\u503c\uff09\u3002<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><strong>6.\u00a0\u00a0\u00a0\u00a0\u5982\u4f55\u4f30\u8ba1RS-485\u7684\u529f\u8017\uff1f<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>\u8981\u8ba1\u7b97\u529f\u8017\uff0c\u53ef\u5c06\u529f\u7387\u5206\u4e3a\u51e0\u90e8\u5206\u3002\u5f53\u5668\u4ef6\u5728\u6ca1\u6709\u5916\u90e8\u8d1f\u8f7d\u7684\u60c5\u51b5\u4e0b\u901a\u7535\u65f6\uff0c\u529f\u8017\u5c06\u7528\u4e8e\u96c6\u6210\u7535\u8def\u672c\u8eab\u3002\u5982\u679c\u5728\u8f93\u51fa\u5f15\u811a\u4e0a\u589e\u52a0\u8d1f\u8f7d\uff0c\u5219\u9a71\u52a8\u8d1f\u8f7d\u7684\u529f\u7387\u5c06\u4ece\u5668\u4ef6\u4e2d\u62bd\u53d6\u3002\u7531\u4e8eRS-485\u5177\u6709\u5dee\u5206\u4fe1\u53f7\uff0c\u56e0\u6b64\u8d1f\u8f7d\u901a\u5e38\u6dfb\u52a0\u5728A\u548cB\u5f15\u811a\u4e4b\u95f4\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u5728\u56fe4\u4e2d\uff0c\u84dd\u8272\u8f68\u8ff9\uff0cPDic\uff0c\u662f\u5668\u4ef6\u6d88\u8017\u7684\u529f\u7387\u3002\u5bf9\u4e8e\u4f4e\u6570\u636e\u901f\u7387\uff0c\u529f\u8017\u4e3b\u8981\u6765\u81ea\u7535\u963b\u8d1f\u8f7d\uff08\u7ea2\u8272\u8ff9\u7ebf\uff09\uff0cPDdc\u3002\u5bf9\u4e8e\u9ad8\u6570\u636e\u901f\u7387\uff0c\u9700\u8003\u8651\u7535\u5bb9\u6027\u8d1f\u8f7d\u7684\u529f\u8017\uff08\u7eff\u8272\u8ff9\u7ebf\uff09PDac\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211021262.png\" rel=\"noopener noreferrer nofollow lightbox-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.modbus.cn\/wp-content\/uploads\/2023\/08\/20230802211021262.png\" width=\"300\" height=\"358\" \/ loading=\"lazy\" title=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe5\" alt=\"RS-485\u6536\u53d1\u5668\u96be\u9898\u8be6\u89e3\u63d2\u56fe5\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u56fe4\uff1a\u8ba1\u7b97\u529f\u8017\u6247\u533a<\/p>\n<p>&nbsp;<\/p>\n<p>\u516c\u5f0f3\u8ba1\u7b97\u603b\u529f\u8017\u4e3a\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>PDtotal\u00a0=\u00a0PDic\u00a0+\u00a0PDdc\u00a0+\u00a0PDac\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(3)<\/p>\n<p>&nbsp;<\/p>\n<p>\u5982\u9700\u8ba1\u7b97\u603b\u529f\u8017\uff0c\u5fc5\u987b\u9996\u5148\u8ba1\u7b97\u51fa\u6bcf\u4e2a\u90e8\u5206\u7684\u529f\u7387\u3002\u5668\u4ef6\u529f\u8017\u53c2\u89c1\u516c\u5f0f4\uff0c\u5176\u4e2d\u9759\u6001\u7535\u6e90\u7535\u6d41Icc\u5728\u6570\u636e\u624b\u518c\u4e2d\u6307\u5b9a\uff1a<\/p>\n<p>&nbsp;<\/p>\n<p>PDic\u00a0=\u00a0Vcc*Icc\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(4)<\/p>\n<p>&nbsp;<\/p>\n<p>\u5982\u679c\u5c06\u7535\u963b\u6027\u8d1f\u8f7d\u7f6e\u4e8e\u603b\u7ebf\u4e0a\uff0c\u9a71\u52a8\u5668\u4f1a\u5728\u5176\u4e0a\u4ea7\u751f\u4e00\u4e2a\u7535\u538b\uff08Vod\uff09\uff0c\u5982\u516c\u5f0f5\u548c6\u6240\u793a\uff0c\u5176\u4e2dC\u662f\u5bc4\u751f\u7535\u5bb9\uff0c\u5b83\u5305\u62ec\u6536\u53d1\u5668\u7684\u7535\u5bb9\u3001\u8d1f\u8f7d\u7684\u7535\u5bb9\u548c\u8ff9\u7ebf\u7535\u5bb9\u3002\u6570\u636e\u9891\u7387f\u4e5f\u5305\u62ec\u5728\u8ba1\u7b97\u4e2d\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>PDdc\u00a0=\u00a0Vcc*I \u2013 I2*R = (Vcc\u00a0\u2013 I*R)*I\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(5)<\/p>\n<p>&nbsp;<\/p>\n<p>PDac\u00a0= 2*2C*f*Vcc*Vod\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0(6)<\/p>\n<p>&nbsp;<\/p>\n<p>\u9605\u8bfb\u535a\u6587\uff1a\u201c\u5982\u4f55\u8ba1\u7b97\u9ad8\u901fRS-485\u6536\u53d1\u5668\u7684\u529f\u8017\u201d\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>7.\u00a0\u00a0\u00a0\u00a0\u5982\u4f55\u4fdd\u62a4RS-485\u63a5\u53e3\u514d\u53d7\u9759\u7535\u91ca\u653e\uff08ESD\uff09\u5f71\u54cd\uff1f<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>ESD\u4fdd\u62a4\u6709\u591a\u79cd\u7c7b\u578b\uff0c\u5305\u62ec\u4eba\u4f53\u6a21\u578b\u3001\u56fd\u9645\u7535\u5de5\u59d4\u5458\u4f1a\uff08IEC\uff09\u63a5\u89e6\u653e\u7535\u548cIEC\u6c14\u9699\u653e\u7535\u3002\u5982\u679c\u4e00\u4e2a\u6536\u53d1\u5668\u5177\u6709\u96c6\u6210\u4e86IEC ESD\uff08\u4f8b\u5982\u5fb7\u5dde\u4eea\u5668\u7684THVD1450\u6216THVD1500\uff09\uff0c\u5219\u65e0\u9700\u5916\u90e8\u7ec4\u4ef6\u5c31\u53ef\u5728\u6307\u5b9a\u6536\u53d1\u5668\u7684\u7535\u5e73\u4e0a\u4fdd\u62a4RS-485\u63a5\u53e3\u514d\u53d7ESD\u7684\u5f71\u54cd\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u4f8b\u5982\uff0c\u5728\u6ca1\u6709\u4efb\u4f55\u5916\u90e8\u5143\u4ef6\u7684\u60c5\u51b5\u4e0b\uff0cTHVD1450\u53ef\u4ee5\u652f\u630118-kV IEC 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