{"id":78373,"date":"2026-02-27T11:05:58","date_gmt":"2026-02-27T03:05:58","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/78373.html"},"modified":"2026-02-27T11:05:58","modified_gmt":"2026-02-27T03:05:58","slug":"%e4%b8%b2%e5%8f%a3%e3%80%81uart%e3%80%81rs-232%e3%80%81rs-485%e3%80%81rs-422%ef%bc%9a%e7%bb%88%e4%ba%8e%e6%9c%89%e4%ba%ba%e6%8a%8a%e5%ae%83%e4%bb%ac%e7%9a%84%e5%85%b3%e7%b3%bb%e8%ae%b2%e6%b8%85","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/78373.html","title":{"rendered":"\u4e32\u53e3\u3001UART\u3001RS-232\u3001RS-485\u3001RS-422\uff1a\u7ec8\u4e8e\u6709\u4eba\u628a\u5b83\u4eec\u7684\u5173\u7cfb\u8bb2\u6e05\u695a\u4e86"},"content":{"rendered":"<h2>\u4e32\u53e3\u3001UART\u3001RS-232\u3001RS-485\u3001RS-422&#xff1a;\u7ec8\u4e8e\u6709\u4eba\u628a\u5b83\u4eec\u7684\u5173\u7cfb\u8bb2\u6e05\u695a\u4e86<\/h2>\n<p>\u5728\u5d4c\u5165\u5f0f\u5f00\u53d1\u3001\u5de5\u4e1a\u63a7\u5236\u548c\u7269\u8054\u7f51\u9886\u57df&#xff0c;\u6211\u4eec\u51e0\u4e4e\u5929\u5929\u90fd\u5728\u548c\u201c\u4e32\u53e3\u201d\u6253\u4ea4\u9053\u3002\u4f46\u6709\u4e00\u4e2a\u73b0\u8c61\u5f88\u6709\u610f\u601d&#xff1a;\u5f88\u591a\u5de5\u7a0b\u5e08\u867d\u7136\u80fd\u7528\u597d\u5b83&#xff0c;\u4f46\u5f53\u88ab\u95ee\u5230\u201cUART\u548cRS-232\u5230\u5e95\u6709\u4ec0\u4e48\u533a\u522b&#xff1f;\u201d\u65f6&#xff0c;\u5f80\u5f80\u4f1a\u9677\u5165\u77ed\u6682\u7684\u8ff7\u832b\u3002<\/p>\n<p>\u201c\u4e32\u53e3\u4e0d\u5c31\u662fDB9\u63a5\u5934\u5417&#xff1f;\u201d<br \/>\n\u201cRS-232\u548cRS-485\u90fd\u662f\u4e32\u53e3\u5427&#xff1f;\u201d<br \/>\n\u201c\u4e3a\u4ec0\u4e48232\u4f20\u4e0d\u8fdc&#xff0c;485\u5c31\u80fd\u4f20\u5f88\u8fdc&#xff1f;\u201d<\/p>\n<p>\u4eca\u5929&#xff0c;\u6211\u4eec\u5c31\u6765\u5f7b\u5e95\u7406\u6e05\u8fd9\u4e9b\u6982\u5ff5\u4e4b\u95f4\u7684\u5173\u7cfb&#xff0c;\u5c24\u5176\u662f\u90a3\u4e9b\u6700\u5bb9\u6613\u8ba9\u4eba\u6df7\u6dc6\u7684\u8bef\u533a\u3002<\/p>\n<h3>\u4e00\u3001\u6838\u5fc3\u6982\u5ff5&#xff1a;\u4e09\u5c42\u6a21\u578b<\/h3>\n<p>\u8981\u7406\u89e3\u8fd9\u4e2a\u95ee\u9898&#xff0c;\u9996\u5148\u8981\u5728\u8111\u6d77\u4e2d\u5efa\u7acb\u4e00\u4e2a\u4e09\u5c42\u6a21\u578b\u3002\u6240\u6709\u7684\u4e32\u884c\u901a\u4fe1&#xff0c;\u90fd\u53ef\u4ee5\u62c6\u89e3\u4e3a\u4e09\u4e2a\u72ec\u7acb\u7684\u5c42\u6b21&#xff1a;<\/p>\n<li>\u903b\u8f91\u5c42&#xff08;\u534f\u8bae\u5c42&#xff09;&#xff1a; \u6570\u636e\u600e\u4e48\u6253\u5305&#xff1f;\u2014\u2014 \u8fd9\u662f UART \u5e72\u7684\u4e8b\u3002<\/li>\n<li>\u7269\u7406\u5c42&#xff08;\u7535\u6c14\u5c42&#xff09;&#xff1a; 1\u548c0\u600e\u4e48\u53d8\u6210\u7535\u538b&#xff1f;\u2014\u2014 \u8fd9\u662f RS-232\u3001RS-485\u3001RS-422 \u5e72\u7684\u4e8b\u3002<\/li>\n<li>\u673a\u68b0\u5c42&#xff08;\u8fde\u63a5\u5668\u5c42&#xff09;&#xff1a; \u7528\u4ec0\u4e48\u5f62\u72b6\u7684\u63a5\u5934&#xff1f;\u2014\u2014 \u8fd9\u662f DB9\u3001DB25\u3001RJ45\u3001\u63a5\u7ebf\u7aef\u5b50 \u5e72\u7684\u4e8b\u3002<\/li>\n<p>\u7edd\u5927\u591a\u6570\u4eba\u7684\u8bef\u89e3&#xff0c;\u90fd\u6e90\u4e8e\u628a\u8fd9\u4e09\u5c42\u6df7\u4e3a\u4e00\u8c08\u3002<\/p>\n<hr \/>\n<h3>\u4e8c\u3001\u903b\u8f91\u5c42&#xff1a;UART&#xff08;\u771f\u6b63\u7684\u201c\u4e32\u53e3\u201d&#xff09;<\/h3>\n<p>\u5f53\u5927\u5bb6\u5728\u4ee3\u7801\u91cc\u5199 printf \u6216\u8005\u914d\u7f6e USART \u5bc4\u5b58\u5668\u65f6&#xff0c;\u6253\u4ea4\u9053\u7684\u5c31\u662f UART\u3002<\/p>\n<ul>\n<li>\u5168\u79f0&#xff1a; Universal Asynchronous Receiver\/Transmitter&#xff08;\u901a\u7528\u5f02\u6b65\u6536\u53d1\u5668&#xff09;\u3002<\/li>\n<li>\u672c\u8d28&#xff1a; \u5b83\u662f\u4e00\u79cd\u901a\u4fe1\u534f\u8bae&#xff0c;\u5b9a\u4e49\u4e86\u4e00\u5e27\u6570\u636e\u7684\u957f\u76f8\u3002<\/li>\n<\/ul>\n<h4>UART \u7684\u4e00\u5e27\u6570\u636e\u957f\u4ec0\u4e48\u6837&#xff1f;<\/h4>\n<p>\u8d77\u59cb\u4f4d(1\u4f4d) &#043; \u6570\u636e\u4f4d(5~8\u4f4d) &#043; \u6821\u9a8c\u4f4d(0\/1\u4f4d) &#043; \u505c\u6b62\u4f4d(1~2\u4f4d)<\/p>\n<p>\u5173\u952e\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u5f02\u6b65&#xff1a; \u6ca1\u6709\u65f6\u949f\u7ebf&#xff0c;\u9760\u53cc\u65b9\u7684\u6ce2\u7279\u7387&#xff08;\u6bcf\u79d2\u591a\u5c11\u4f4d&#xff09;\u6765\u540c\u6b65\u3002<\/li>\n<li>\u7535\u5e73&#xff1a; \u5728\u82af\u7247\u5f15\u811a\u4e0a&#xff0c;\u901a\u5e38\u662f TTL \u7535\u5e73&#xff1a;\n<ul>\n<li>\u9ad8\u7535\u5e73&#xff08;\u5982 3.3V \u6216 5V&#xff09;\u4ee3\u8868 \u903b\u8f91 1<\/li>\n<li>\u4f4e\u7535\u5e73&#xff08;\u5982 0V&#xff09;\u4ee3\u8868 \u903b\u8f91 0<\/li>\n<\/ul>\n<\/li>\n<li>\u5c40\u9650\u6027&#xff1a; TTL\u7535\u5e73\u4fe1\u53f7\u7ebf\u5f88\u77ed&#xff08;\u51e0\u5341\u5398\u7c73&#xff09;&#xff0c;\u6297\u5e72\u6270\u80fd\u529b\u5dee&#xff0c;\u65e0\u6cd5\u76f4\u63a5\u7528\u4e8e\u5de5\u4e1a\u73b0\u573a\u6216\u957f\u8ddd\u79bb\u4f20\u8f93\u3002<\/li>\n<\/ul>\n<p>\u7ed3\u8bba&#xff1a;UART \u53ea\u662f\u89c4\u5b9a\u4e86\u6570\u636e\u7684\u201c\u683c\u5f0f\u201d&#xff0c;\u6ca1\u89c4\u5b9a\u600e\u4e48\u628a\u4fe1\u53f7\u53d1\u5230\u8fdc\u8ddd\u79bb\u7684\u7535\u7f06\u4e0a\u53bb\u3002<\/p>\n<hr \/>\n<h3>\u4e09\u3001\u7269\u7406\u5c42&#xff1a;\u4e09\u5927\u7535\u6c14\u6807\u51c6<\/h3>\n<p>\u65e2\u7136UART\u51fa\u6765\u7684\u4fe1\u53f7&#xff08;TTL\u7535\u5e73&#xff09;\u8dd1\u4e0d\u8fdc&#xff0c;\u5c31\u9700\u8981\u7ed9\u8fd9\u4e9b\u4fe1\u53f7\u52a0\u4e00\u5c42\u201c\u9a71\u52a8\u201d&#xff0c;\u8ba9\u5b83\u80fd\u9002\u5e94\u4e0d\u540c\u7684\u7269\u7406\u73af\u5883\u3002\u8fd9\u5c31\u662f RS-232\u3001RS-485\u3001RS-422 \u7684\u7531\u6765\u3002<\/p>\n<p>\u5b83\u4eec\u672c\u8d28\u4e0a\u90fd\u662f \u201c\u7535\u5e73\u8f6c\u6362\u6807\u51c6\u201d&#xff0c;\u53ea\u89e3\u51b3\u7269\u7406\u4f20\u8f93\u95ee\u9898&#xff0c;\u4e0d\u5173\u5fc3\u6570\u636e\u91cc\u88c5\u7684\u662f\u4ec0\u4e48\u3002<\/p>\n<h4>1. RS-232&#xff1a;\u65e9\u671f\u7684\u201c\u70b9\u5bf9\u70b9\u201d\u8001\u5c06<\/h4>\n<p>\u8fd9\u662f\u5927\u5bb6\u6700\u719f\u6089\u7684&#xff0c;\u56e0\u4e3a\u5b83\u5c31\u662f\u8001\u5f0f\u7535\u8111\u4e3b\u673a\u540e\u9762\u7684DB9\u63a5\u53e3\u3002<\/p>\n<ul>\n<li>\u7535\u6c14\u7279\u6027&#xff1a;\n<ul>\n<li>\u903b\u8f91 1&#xff1a; -15V ~ -3V<\/li>\n<li>\u903b\u8f91 0&#xff1a; &#043;3V ~ &#043;15V<\/li>\n<li>\u6ce8\u610f&#xff1a; \u5b83\u662f\u5355\u7aef\u4f20\u8f93&#xff0c;\u7535\u538b\u662f\u5bf9\u5730\u6d4b\u91cf\u7684\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u4f18\u7f3a\u70b9&#xff1a;\n<ul>\n<li>\u2705 \u7b80\u5355&#xff1a; \u7ebf\u5c11&#xff08;\u6700\u5c11\u53ea\u97003\u6839\u7ebf&#xff1a;TXD, RXD, GND&#xff09;\u3002<\/li>\n<li>\u274c \u7535\u538b\u6446\u5e45\u5927&#xff1a; \u9700\u8981\u6b63\u8d1f\u7535\u6e90&#xff0c;\u529f\u8017\u9ad8\u3002<\/li>\n<li>\u274c \u6297\u5e72\u6270\u5dee&#xff1a; \u5355\u7aef\u4fe1\u53f7&#xff0c;\u5171\u6a21\u566a\u58f0\u6291\u5236\u80fd\u529b\u5f31\u3002<\/li>\n<li>\u274c \u4f20\u8f93\u8ddd\u79bb\u77ed&#xff1a; \u901a\u5e38\u5efa\u8bae\u4e0d\u8d85\u8fc715\u7c73\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5bb9\u6613\u8bef\u89e3\u7684\u5730\u65b9&#xff1a;\n<ul>\n<li>\u8bef\u89e3&#xff1a; \u201cRS-232\u63a5\u53e3\u5c31\u662fDB9\u5934\u3002\u201d<\/li>\n<li>\u6b63\u89e3&#xff1a; DB9\u53ea\u662f\u6700\u5e38\u7528\u7684\u8fde\u63a5\u5668\u3002RS-232\u6807\u51c6\u672c\u8eab\u5e76\u4e0d\u5f3a\u5236\u4f7f\u7528DB9&#xff0c;\u53ea\u662f\u89c4\u5b9a\u4e86\u7535\u6c14\u7279\u6027\u3002\u5f88\u591a\u5de5\u4e1a\u8bbe\u5907\u5185\u90e8\u5176\u5b9e\u662fTTL\u4e32\u53e3&#xff0c;\u901a\u8fc7\u4e00\u4e2aMAX232\u82af\u7247\u624d\u8f6c\u6210RS-232\u7535\u5e73\u7684\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>2. RS-485&#xff1a;\u5de5\u4e1a\u73b0\u573a\u7684\u201c\u603b\u7ebf\u4e4b\u738b\u201d<\/h4>\n<p>\u5982\u679c\u8981\u5728\u5de5\u4e1a\u73af\u5883\u91cc\u8dd1\u51e0\u767e\u7c73&#xff0c;\u6216\u8005\u6302\u51e0\u5341\u4e2a\u8bbe\u5907&#xff0c;\u5c31\u5f97\u9760RS-485\u3002<\/p>\n<ul>\n<li>\u7535\u6c14\u7279\u6027&#xff1a;\n<ul>\n<li>\u4f7f\u7528\u5dee\u5206\u4fe1\u53f7&#xff08;\u4e24\u6839\u7ebf&#xff1a;A \u548c B&#xff09;\u3002<\/li>\n<li>\u903b\u8f91 1&#xff1a; \u4e24\u6839\u7ebf\u7535\u538b\u5dee\u4e3a\u8d1f&#xff08;B &gt; A&#xff09;<\/li>\n<li>\u903b\u8f91 0&#xff1a; \u4e24\u6839\u7ebf\u7535\u538b\u5dee\u4e3a\u6b63&#xff08;A &gt; B&#xff09;<\/li>\n<li>\u6ce8\u610f&#xff1a; \u4e0d\u4f9d\u8d56\u5bf9\u5730\u7535\u538b&#xff0c;\u53ea\u770b\u4e24\u6839\u7ebf\u4e4b\u95f4\u7684\u7535\u538b\u5dee\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u4f18\u7f3a\u70b9&#xff1a;\n<ul>\n<li>\u2705 \u6297\u5e72\u6270\u5f3a&#xff1a; \u5dee\u5206\u4f20\u8f93&#xff0c;\u5171\u6a21\u566a\u58f0\u88ab\u62b5\u6d88\u3002<\/li>\n<li>\u2705 \u4f20\u8f93\u8ddd\u79bb\u8fdc&#xff1a; \u53ef\u8fbe1200\u7c73\u4ee5\u4e0a\u3002<\/li>\n<li>\u2705 \u652f\u6301\u591a\u8282\u70b9&#xff1a; \u4e00\u6761\u603b\u7ebf\u4e0a\u53ef\u4ee5\u6302\u6700\u591a256\u4e2a\u8bbe\u5907&#xff08;\u534a\u53cc\u5de5&#xff09;\u3002<\/li>\n<li>\u2705 \u901f\u7387\u9ad8&#xff1a; \u77ed\u8ddd\u79bb\u4e0b\u53ef\u8fbe10Mbps\u4ee5\u4e0a\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5bb9\u6613\u8bef\u89e3\u7684\u5730\u65b9&#xff1a;\n<ul>\n<li>\u8bef\u89e3&#xff1a; \u201cRS-485\u662f\u4e32\u53e3\u534f\u8bae\u3002\u201d<\/li>\n<li>\u6b63\u89e3&#xff1a; RS-485\u53ea\u662f\u7269\u7406\u5c42\u3002\u4f60\u5728\u4e0a\u9762\u8dd1Modbus\u534f\u8bae\u662f\u4e32\u53e3\u6570\u636e&#xff0c;\u8dd1Profibus\u534f\u8bae\u4e5f\u662f\u4e32\u53e3\u6570\u636e&#xff0c;\u751a\u81f3\u8dd1\u81ea\u5b9a\u4e49\u7684\u7b80\u5355\u8109\u51b2\u4fe1\u53f7\u90fd\u53ef\u4ee5\u3002\u5b83\u53ea\u8d1f\u8d23\u4f20\u8f930\u548c1\u3002<\/li>\n<li>\u8bef\u89e3&#xff1a; \u201cRS-485\u662f\u5168\u53cc\u5de5\u7684\u3002\u201d<\/li>\n<li>\u6b63\u89e3&#xff1a; \u6807\u51c6RS-485\u662f\u534a\u53cc\u5de5\u7684\u3002\u6536\u53d1\u4e0d\u80fd\u540c\u65f6\u8fdb\u884c&#xff0c;\u9700\u8981\u8f6f\u4ef6\u6216\u786c\u4ef6\u63a7\u5236\u6536\u53d1\u5207\u6362\u3002\u5982\u679c\u60f3\u5168\u53cc\u5de5&#xff0c;\u8bf7\u770b\u4e0b\u9762\u7684RS-422\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>3. RS-422&#xff1a;\u5168\u53cc\u5de5\u7684\u201c\u589e\u5f3a\u7248\u5355\u4e3b\u673a\u201d<\/h4>\n<p>RS-422\u53ef\u4ee5\u7406\u89e3\u4e3aRS-485\u7684\u201c\u5927\u54e5\u201d&#xff0c;\u6216\u8005\u8bf4\u662fRS-485\u7684\u5168\u53cc\u5de5\u53d8\u79cd\u3002<\/p>\n<ul>\n<li>\u7535\u6c14\u7279\u6027&#xff1a;\n<ul>\n<li>\u4e5f\u662f\u5dee\u5206\u4fe1\u53f7&#xff0c;\u539f\u7406\u4e0eRS-485\u76f8\u540c\u3002<\/li>\n<li>\u4f46\u901a\u5e38\u6709\u4e24\u5bf9\u7ebf&#xff1a;\u4e00\u5bf9\u7528\u4e8e\u53d1\u9001&#xff08;TX&#043; \/ TX-&#xff09;&#xff0c;\u4e00\u5bf9\u7528\u4e8e\u63a5\u6536&#xff08;RX&#043; \/ RX-&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u4e0eRS-485\u7684\u4e3b\u8981\u533a\u522b&#xff1a;\n<ul>\n<li>\u5de5\u4f5c\u6a21\u5f0f&#xff1a; RS-422\u662f\u5168\u53cc\u5de5&#xff08;\u53ef\u4ee5\u540c\u65f6\u53d1\u548c\u6536&#xff09;&#xff0c;RS-485\u662f\u534a\u53cc\u5de5&#xff08;\u540c\u4e00\u65f6\u523b\u53ea\u80fd\u53d1\u6216\u6536&#xff09;\u3002<\/li>\n<li>\u62d3\u6251\u7ed3\u6784&#xff1a; RS-422\u53ea\u5141\u8bb8\u4e00\u4e2a\u53d1\u9001\u7aef&#xff08;\u9a71\u52a8\u5668&#xff09;&#xff0c;\u4f46\u53ef\u4ee5\u6709\u591a\u4e2a\u63a5\u6536\u7aef\u3002\u5b83\u662f\u4e00\u4e2a\u9a71\u52a8\u5e26\u591a\u4e2a\u8d1f\u8f7d\u3002RS-485\u5141\u8bb8\u591a\u4e2a\u53d1\u9001\u7aef&#xff08;\u90fd\u662f\u9a71\u52a8\u5668&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5bb9\u6613\u8bef\u89e3\u7684\u5730\u65b9&#xff1a;\n<ul>\n<li>\u8bef\u89e3&#xff1a; \u201cRS-422\u5c31\u662f4\u7ebf\u7684RS-485\u3002\u201d<\/li>\n<li>\u6b63\u89e3&#xff1a; \u786c\u4ef6\u8fde\u7ebf\u867d\u7136\u5f88\u50cf&#xff08;\u90fd\u662f\u5dee\u5206\u5bf9&#xff09;&#xff0c;\u4f46\u82af\u7247\u7684\u9a71\u52a8\u80fd\u529b\u4e0d\u540c\u3002RS-422\u7684\u9a71\u52a8\u5668\u4e0d\u80fd\u5728\u603b\u7ebf\u4e0a\u88ab\u7981\u7528&#xff08;\u4e09\u6001&#xff09;&#xff0c;\u6240\u4ee5\u4e0d\u80fd\u50cfRS-485\u90a3\u6837\u7ec4\u6210\u591a\u4e3b\u673a\u7f51\u7edc\u3002\u5982\u679c\u628aRS-422\u82af\u7247\u7528\u5728RS-485\u603b\u7ebf\u4e0a&#xff0c;\u53ef\u80fd\u4f1a\u70e7\u6bc1\u82af\u7247\u6216\u8005\u603b\u7ebf\u51b2\u7a81\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>\u56db\u3001\u7ecf\u5178\u8bef\u533a\u5927\u626b\u76f2<\/h3>\n<p>\u7ed3\u5408\u4e0a\u9762\u7684\u4e09\u5c42\u6a21\u578b&#xff0c;\u6211\u4eec\u6765\u56de\u7b54\u51e0\u4e2a\u6700\u5e38\u89c1\u7684\u5751&#xff1a;<\/p>\n<h4>\u8bef\u533a1&#xff1a;\u201c232\/485\/422\u662f\u4e32\u53e3\u534f\u8bae\u201d<\/h4>\n<p>\u7ea0\u6b63&#xff1a; \u5b83\u4eec\u662f\u7269\u7406\u5c42\u6807\u51c6\u3002\u771f\u6b63\u7684\u4e32\u53e3\u534f\u8bae&#xff08;\u6570\u636e\u683c\u5f0f&#xff09;\u662fUART\u5b9a\u4e49\u7684\u3002\u4f60\u53ef\u4ee5\u628aUART\u6570\u636e\u901a\u8fc7RS-232\u53d1\u51fa\u53bb&#xff0c;\u4e5f\u53ef\u4ee5\u901a\u8fc7RS-485\u53d1\u51fa\u53bb&#xff0c;\u5185\u5bb9\u5b8c\u5168\u4e00\u6837&#xff0c;\u53ea\u662f\u7535\u4fe1\u53f7\u8868\u73b0\u5f62\u5f0f\u4e0d\u540c\u3002<\/p>\n<h4>\u8bef\u533a2&#xff1a;\u201cTTL\u4e32\u53e3\u5c31\u662fRS-232\u201d<\/h4>\n<p>\u7ea0\u6b63&#xff1a; \u8fd9\u662f\u5bfc\u81f4\u5355\u7247\u673a\u70e7\u6bc1\u7684\u6700\u5e38\u89c1\u539f\u56e0&#xff01;<\/p>\n<ul>\n<li>TTL\u4e32\u53e3&#xff1a; 0V \u548c 3.3V\/5V\u3002<\/li>\n<li>RS-232\u4e32\u53e3&#xff1a; -15V~-3V \u548c &#043;3V~&#043;15V\u3002<br \/>\n\u76f4\u63a5\u8fde\u63a5\u4f1a\u70e7\u82af\u7247\u3002\u5fc5\u987b\u7528 MAX232 \u4e4b\u7c7b\u7684\u7535\u5e73\u8f6c\u6362\u82af\u7247\u3002<\/li>\n<\/ul>\n<h4>\u8bef\u533a3&#xff1a;\u201c485\u603b\u7ebf\u5c31\u4e24\u6839\u7ebf&#xff0c;\u6bd4232\u5148\u8fdb\u201d<\/h4>\n<p>\u7ea0\u6b63&#xff1a; \u5404\u6709\u7528\u9014\u3002232\u662f\u5168\u53cc\u5de5&#xff08;\u867d\u7136\u7ebf\u5c11\u662f\u56e0\u4e3a\u6536\u53d1\u5206\u5f00&#xff09;&#xff0c;485\u867d\u7136\u662f\u4e24\u6839\u7ebf\u4f46\u901a\u5e38\u662f\u534a\u53cc\u5de5\u3002485\u7684\u201c\u4e24\u6839\u7ebf\u201d\u662f\u6307\u9a71\u52a8\u7ebf&#xff0c;\u5b83\u8282\u7701\u4e86\u7ebf\u7f06&#xff0c;\u4f46\u727a\u7272\u4e86\u540c\u65f6\u6536\u53d1\u7684\u80fd\u529b\u3002<\/p>\n<h4>\u8bef\u533a4&#xff1a;\u201cDB9\u63a5\u53e3 &#061; RS-232\u201d<\/h4>\n<p>\u7ea0\u6b63&#xff1a; DB9\u53ea\u662f\u4e00\u4e2a9\u9488\u7684\u8fde\u63a5\u5668\u5916\u58f3\u3002\u5f88\u591a\u5de5\u4e1a\u8bbe\u5907\u7528DB9\u63a5\u53e3&#xff0c;\u4f46\u91cc\u9762\u8dd1\u7684\u662fRS-485\u4fe1\u53f7\u3002\u4f8b\u5982\u67d0\u4e9bPLC\u7684\u7f16\u7a0b\u53e3&#xff0c;\u867d\u7136\u4e5f\u662fDB9&#xff0c;\u4f46\u5f15\u811a\u5b9a\u4e49\u5b8c\u5168\u4e0d\u662f\u6807\u51c6\u7684RS-232\u3002\u6240\u4ee5\u505a\u5de5\u7a0b\u65f6\u4e0d\u8981\u53ea\u770b\u63a5\u53e3\u5f62\u72b6&#xff0c;\u4e00\u5b9a\u8981\u770b\u56fe\u7eb8\u4e0a\u7684\u5f15\u811a\u5b9a\u4e49\u3002<\/p>\n<hr \/>\n<h3>\u4e94\u3001\u4e00\u5f20\u56fe\u603b\u7ed3\u5b83\u4eec\u7684\u5173\u7cfb<\/h3>\n<p>\u4e3a\u4e86\u66f4\u76f4\u89c2\u5730\u7406\u89e3&#xff0c;\u53ef\u4ee5\u770b\u8fd9\u4e2a\u5c42\u6b21\u5173\u7cfb&#xff1a;<\/p>\n<table>\n<tr>\u5c42\u6b21\u5177\u4f53\u6280\u672f\/\u6807\u51c6\u804c\u8d23\u63cf\u8ff0<\/tr>\n<tbody>\n<tr>\n<td align=\"left\">\u903b\u8f91\u5c42<\/td>\n<td align=\"left\">UART<\/td>\n<td align=\"left\">\u51b3\u5b9a\u6570\u636e\u683c\u5f0f (\u8d77\u59cb\u4f4d\u3001\u505c\u6b62\u4f4d\u3001\u6821\u9a8c\u4f4d)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">\u2193<\/td>\n<td align=\"left\">\u2191<\/td>\n<td align=\"left\"><\/td>\n<\/tr>\n<tr>\n<td align=\"left\">\u7269\u7406\u5c42<\/td>\n<td align=\"left\">RS-232<\/td>\n<td align=\"left\">\u51b3\u5b9a\u7535\u5e73\u6807\u51c6 (\u5355\u7aef&#xff0c;\u00b112V&#xff0c;\u70b9\u5bf9\u70b9&#xff0c;\u5168\u53cc\u5de5)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><\/td>\n<td align=\"left\">RS-485<\/td>\n<td align=\"left\">\u51b3\u5b9a\u7535\u5e73\u6807\u51c6 (\u5dee\u5206&#xff0c;\u534a\u53cc\u5de5&#xff0c;\u591a\u8282\u70b9&#xff0c;\u957f\u8ddd\u79bb)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\"><\/td>\n<td align=\"left\">RS-422<\/td>\n<td align=\"left\">\u51b3\u5b9a\u7535\u5e73\u6807\u51c6 (\u5dee\u5206&#xff0c;\u5168\u53cc\u5de5&#xff0c;\u4e00\u4e3b\u591a\u4ece)<\/td>\n<\/tr>\n<tr>\n<td align=\"left\">\u2193<\/td>\n<td align=\"left\">\u2191<\/td>\n<td align=\"left\"><\/td>\n<\/tr>\n<tr>\n<td align=\"left\">\u673a\u68b0\u5c42<\/td>\n<td align=\"left\">DB9 \/ DB25 \/ \u7aef\u5b50<\/td>\n<td align=\"left\">\u51b3\u5b9a\u7269\u7406\u63a5\u53e3\u5f62\u72b6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4e00\u53e5\u8bdd\u603b\u7ed3&#xff1a;<br \/>\nUART \u6253\u5305\u597d\u884c\u674e&#xff08;\u6570\u636e&#xff09;&#xff0c;\u7136\u540e\u4ea4\u7ed9 RS-232&#xff08;\u51fa\u79df\u8f66&#xff09;\u6216\u8005 RS-485&#xff08;\u957f\u9014\u5927\u5df4&#xff09;\u6216\u8005 RS-422&#xff08;\u4e13\u8f66&#xff09;&#xff0c;\u901a\u8fc7 DB9&#xff08;\u8f66\u95e8&#xff09;\u4e0a\u8f66\u51fa\u53d1\u3002<\/p>\n<p>\u4e0b\u6b21\u518d\u770b\u5230\u201c\u4e32\u53e3\u201d\u8fd9\u4e24\u4e2a\u5b57&#xff0c;\u5e0c\u671b\u80fd\u5148\u60f3\u4e00\u4e0b&#xff1a;\u5bf9\u65b9\u6307\u7684\u662f\u903b\u8f91\u5c42\u7684UART\u534f\u8bae&#xff0c;\u8fd8\u662f\u7269\u7406\u5c42\u7684\u7535\u6c14\u63a5\u53e3&#xff0c;\u8fd8\u662f\u4ec5\u4ec5\u662f\u90a3\u4e2aDB9\u7684\u7269\u7406\u63a5\u53e3&#xff1f;\u5206\u6e05\u8fd9\u4e09\u5c42&#xff0c;\u4e32\u53e3\u901a\u4fe1\u7684\u6240\u6709\u56f0\u60d1\u90fd\u4f1a\u8fce\u5203\u800c\u89e3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e32\u53e3\u3001UART\u3001RS-232\u3001RS-485\u3001RS-422&#xff1a;\u7ec8\u4e8e\u6709\u4eba\u628a\u5b83\u4eec\u7684\u5173\u7cfb\u8bb2\u6e05\u695a\u4e86<br \/>\n\u5728\u5d4c\u5165\u5f0f\u5f00\u53d1\u3001\u5de5\u4e1a\u63a7\u5236\u548c\u7269\u8054\u7f51\u9886\u57df&#xff0c;\u6211\u4eec\u51e0\u4e4e\u5929\u5929\u90fd\u5728\u548c\u201c\u4e32\u53e3\u201d\u6253\u4ea4\u9053\u3002\u4f46\u6709\u4e00\u4e2a\u73b0\u8c61\u5f88\u6709\u610f\u601d&#xff1a;\u5f88\u591a\u5de5\u7a0b\u5e08\u867d\u7136\u80fd\u7528\u597d\u5b83&#xff0c;\u4f46\u5f53\u88ab\u95ee\u5230\u201cUART\u548cRS-232\u5230\u5e95\u6709\u4ec0\u4e48\u533a\u522b&#xff1f;\u201d\u65f6&#xff0c;\u5f80\u5f80\u4f1a\u9677\u5165\u77ed\u6682\u7684\u8ff7\u832b\u3002<br \/>\n\u201c\u4e32\u53e3\u4e0d\u5c31\u662fDB9\u63a5\u5934\u5417&#xff1f;\u201d<br \/>\n\u201cRS-232\u548cRS-485\u90fd\u662f\u4e32\u53e3\u5427&#xff1f;\u201d<br \/>\n\u201c\u4e3a\u4ec0\u4e482<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[8650,8651,7880],"topic":[],"class_list":["post-78373","post","type-post","status-publish","format-standard","hentry","category-server","tag-8650","tag-8651","tag-uart"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4e32\u53e3\u3001UART\u3001RS-232\u3001RS-485\u3001RS-422\uff1a\u7ec8\u4e8e\u6709\u4eba\u628a\u5b83\u4eec\u7684\u5173\u7cfb\u8bb2\u6e05\u695a\u4e86 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/78373.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4e32\u53e3\u3001UART\u3001RS-232\u3001RS-485\u3001RS-422\uff1a\u7ec8\u4e8e\u6709\u4eba\u628a\u5b83\u4eec\u7684\u5173\u7cfb\u8bb2\u6e05\u695a\u4e86 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u4e32\u53e3\u3001UART\u3001RS-232\u3001RS-485\u3001RS-422&#xff1a;\u7ec8\u4e8e\u6709\u4eba\u628a\u5b83\u4eec\u7684\u5173\u7cfb\u8bb2\u6e05\u695a\u4e86 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