RS485\u662f\u4e00\u4e2a\u5b9a\u4e49\u5e73\u8861\u6570\u5b57\u591a\u70b9\u7cfb\u7edf\u4e2d\u7684\u9a71\u52a8\u5668\u548c\u63a5\u6536\u5668\u7684\u7535\u6c14\u7279\u6027\u7684\u6807\u51c6\uff0c\u5728\u73af\u5883\u76d1\u6d4b\u9886\u57df\u6709\u7740\u975e\u5e38\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u901a\u8fc7RS-485\u5e03\u7ebf\u4e0d\u4ec5\u80fd\u591f\u5728\u4e00\u5bf9\u53cc\u7ede\u7ebf\u4e0a\u8fdb\u884c\u591a\u70b9\u53cc\u5411\u901a\u4fe1\uff0c\u5176\u6240\u5177\u6709\u7684\u566a\u58f0\u6291\u5236\u80fd\u529b\u3001\u6570\u636e\u4f20\u8f93\u901f\u7387\u3001\u7535\u7f06\u957f\u5ea6\u53ca\u53ef\u9760\u6027\u4e5f\u662f\u5176\u4ed6\u6807\u51c6\u65e0\u6cd5\u6bd4\u62df\u7684\u3002\u5f53\u9700\u8981\u5728\u566a\u58f0\u73af\u5883\u548c\u6709\u4e00\u5b9a\u8ddd\u79bb\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\u901a\u8baf\u65f6\uff0cRS-485\u5e03\u7ebf\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u9009\u62e9\u3002<\/p>\n\n\n\n
RS485\u603b\u7ebf\u56e0\u5176\u6210\u672c\u4f4e\u5ec9\u3001\u8bbe\u8ba1\u7b80\u5355\u800c\u5f97\u5230\u5e7f\u6cdb\u5e94\u7528\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5b89\u9632\u76d1\u63a7\u3001\u667a\u80fd\u4ea4\u901a\u3001\u667a\u80fd\u697c\u5b87\u3001\u673a\u623f\u76d1\u63a7\u3001\u5de5\u4e1a\u81ea\u52a8\u5316\u7b49\u5404\u4e2a\u9886\u57df\u3002 RS485\u603b\u7ebf\u94fa\u8bbe\u7ebf\u8def\u6bd4\u8f83\u7b80\u5355\uff0c\u4f46\u662f\u6709\u4e00\u4e9b\u76f8\u5e94\u7684\u4e8b\u9879\u662f\u5fc5\u987b\u8981\u6ce8\u610f\u7684\uff0c\u5426\u5219\u5f88\u5bb9\u6613\u5bfc\u81f4\u901a\u8baf\u5931\u8d25\uff0c\u540e\u671f\u7684\u7ef4\u62a4\u5de5\u4f5c\u91cf\u5f88\u5927\u3002\u5c0f\u7f16\u6574\u7406\u7684485\u63a5\u7ebf\u89c4\u8303\u4e2d\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n\n\n\n
\u7528\u4e8e485\u603b\u7ebf\u5e03\u7ebf\u7684\u7ebf\u6750\u5fc5\u987b\u4f7f\u7528\u5c4f\u853d\u53cc\u7ede\u7ebf\uff0c\u7ebf\u5f84\u6700\u597d0.75\u62161.0\u7ebf\u5f84\uff0c\u5f88\u591a\u4eba\u5728\u65bd\u5de5\u4e2d\u4e3a\u4e86\u56fe\u65b9\u4fbf\uff0c\u76f4\u63a5\u4f7f\u7528\u7f51\u7ebf\u4e3a485\u7ebf\uff0c\u7f51\u7ebf\u67098\u6839\u7ebf\uff0c485\u7ebf\u53ea\u9700\u8981\u7528\u4e24\u6839\u6216\u56db\u6839\u7ebf\uff0c\u5176\u4ed6\u7ebf\u90fd\u6d6a\u8d39\u4e86\uff0c\u800c\u4e14\u73b0\u5728\u7684\u7f51\u7ebf\u7ebf\u5f84\u6bd4\u8f83\u7ec6\uff0c\u4e0d\u80fd\u5b8c\u5168\u6ee1\u8db3485\u8def\u516c\u4ea4\u8f66\u3002\u51fa\u4e8e\u901a\u8baf\u9700\u6c42\uff0c\u5efa\u8bae\u4e0d\u8981\u4f7f\u7528\u7f51\u7ebf\u3002<\/p>\n\n\n\n
\u4e5f\u6709\u5e73\u884c\u7ebf\u3001\u540c\u8f74\u7535\u7f06\u6216\u53cc\u7ede\u7ebf\u6ca1\u6709\u5c4f\u853d\u4e0d\u80fd\u4f7f\u7528\u3002\u7531\u4e8e485\u662f\u5dee\u5206\u5e73\u8861\u4f20\u8f93\uff0c\u4f7f\u7528\u53cc\u7ede\u7ebf\u53ef\u4ee5\u6709\u6548\u62b5\u6d88\u5916\u754c\u5e72\u6270\u7684\u5f71\u54cd\u3002\u4e0d\u5f97\u4f7f\u7528 485 \u884c\u3002\u5e73\u884c\u7ebf\uff0c\u540c\u7406\uff0c\u56e0\u4e3a\u5c4f\u853d\u5c42\u6709\u5c4f\u853d\u5916\u754c\u5e72\u6270\u7684\u4f5c\u7528\uff0c\u6700\u597d\u4f7f\u7528\u5e26\u5c4f\u853d\u5c42\u7684\u53cc\u7ede\u7ebf\u3002<\/p>\n\n\n\n
485\u603b\u7ebf\u7684\u63a5\u7ebf\u8981\u5c3d\u91cf\u8fdc\u79bb\u5e72\u6270\u6e90\u3002\u65bd\u5de5\u8fc7\u7a0b\u4e2d\uff0c\u5f88\u591a\u4eba\u4e3a\u4e86\u7701\u4e8b\uff0c\u628a485\u7ebf\u548c\u7535\u6e90\u7ebf\u4e00\u8d77\u5e03\u7ebf\u3002\u8fd9\u662f\u4e0d\u5408\u7406\u7684\u3002\u7535\u6e90\u7ebf\u4f1a\u9020\u6210\u5e72\u6270\uff0c\u9020\u6210485\u901a\u8baf\u3002\u4e0d\u7a33\u5b9a\uff0c485\u63a5\u7ebf\u5fc5\u987b\u8fdc\u79bb\u53d8\u538b\u5668\u3001\u53d8\u9891\u5668\u7b49\u5f3a\u7535\u538b\u5e72\u6270\u6e90\u3002<\/p>\n\n\n\n
\u7531\u4e8e\u73b0\u573a\u73af\u5883\u590d\u6742\uff0c485\u8bbe\u5907\u5206\u5e03\u666e\u904d\u5206\u6563\u3002\u4e3a\u65b9\u4fbf\u65bd\u5de5\u4eba\u5458\uff0c\u7ebf\u8def\u6ca1\u6709\u6309\u7167485\u89c4\u8303\u91c7\u7528\u624b\u62c9\u624b\u83ca\u82b1\u94fe\u603b\u7ebf\u62d3\u6251\u5e03\u5c40\uff0c\u800c\u662f\u4efb\u610f\u91c7\u7528\u661f\u5f62\u3001\u6811\u5f62\u751a\u81f3\u591a\u79cd\u62d3\u6251\u6df7\u5408\u5e03\u5c40\uff0c\u7559\u4e0b\u592a\u591a\u7684\u5206\u652f\u592a\u957f\u3002<\/p>\n\n\n\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6709\u65f6\u53ef\u4ee5\u4f7f\u7528\u7b80\u5355\u7684\u661f\u5f62\u3001\u6811\u5f62\u62d3\u6251\u751a\u81f3\u6df7\u5408\u62d3\u6251\uff0c\u4f46\u901a\u4fe1\u80af\u5b9a\u4f1a\u4e0d\u7a33\u5b9a\u3002\u5982\u679c\u5fc5\u987b\u90e8\u7f72\u661f\u578b\u6216\u6811\u578b\u62d3\u6251\uff0c\u5efa\u8bae\u4f7f\u7528485\u96c6\u7ebf\u5668\u548c485\u4e2d\u7ee7\u5668\uff0c\u76f8\u5173\u5e94\u7528\u53ef\u4ee5\u53c2\u8003485\u603b\u7ebf\u62d3\u6251\u95ee\u9898\u9875\u9762\u3002<\/p>\n\n\n\n
485\u603b\u7ebf\u63a5\u7ebf\u89c4\u8303\u4e2d\u5f3a\u8c03\u9700\u8981\u5355\u70b9\u53ef\u9760\u63a5\u5730\uff0c\u4f46\u5728\u5b9e\u9645\u65bd\u5de5\u4e2d\uff0c485\u603b\u7ebf\u63a5\u5730\u6709\u65f6\u4f1a\u9002\u5f97\u5176\u53cd\u3002\u7531\u4e8e485\u5e03\u7ebf\u9700\u8981\u91c7\u7528\u83ca\u82b1\u94fe\u7684\u65b9\u5f0f\u8fde\u63a5\uff0c\u6240\u4ee5\u4f7f\u7528\u7684\u5c4f\u853d\u53cc\u7ede\u7ebf\u80af\u5b9a\u4f1a\u88ab\u5207\u65ad\u8fde\u63a5\u5230485\u8bbe\u5907\u4e0a\uff0c\u800c\u4e14\u5927\u90e8\u5206\u90fd\u4f1a\u4f7f\u7528\u5916\u5c42\u5c4f\u853d\u5c42\u4f5c\u4e3a\u5730\u7ebf\u3002\u5982\u679c\u5c4f\u853d\u5c42\u8fde\u63a5\u4e0d\u597d\uff0c\u63a5\u5730\u53ef\u80fd\u4f1a\u5bfc\u81f4485\u4fe1\u53f7\u4e0d\u7a33\u5b9a\uff0c\u6240\u4ee5485\u7ebf\u7684\u63a5\u5730\u5fc5\u987b\u662f\u5355\u70b9\u53ef\u9760\u63a5\u5730\u3002<\/p>\n\n\n\n
485+ \u548c 485- \u6570\u636e\u7ebf\u5fc5\u987b\u662f\u53cc\u7ede\u7ebf\u3002<\/p>\n\n\n\n
\u63a5\u7ebf\u5fc5\u987b\u662f\u591a\u80a1\u5c4f\u853d\u53cc\u7ede\u7ebf\u3002\u591a\u80a1\u662f\u5907\u7528\uff0c\u5c4f\u853d\u662f\u7279\u6b8a\u60c5\u51b5\u8c03\u8bd5\u7528\uff0c\u53cc\u7ede\u7ebf\u662f\u56e0\u4e3a485\u901a\u8baf\u91c7\u7528\u5dee\u6a21\u901a\u8baf\u539f\u7406\uff0c\u53cc\u7ede\u7ebf\u7684\u6297\u5e72\u6270\u6027\u6700\u597d\u3002\u4e0d\u4f7f\u7528\u53cc\u7ede\u7ebf\u662f\u975e\u5e38\u9519\u8bef\u7684\u3002<\/p>\n\n\n\n
485\u603b\u7ebf\u5fc5\u987b\u662f\u624b\u62c9\u624b\u603b\u7ebf\u7ed3\u6784\uff0c\u575a\u51b3\u675c\u7edd\u661f\u5f62\u8fde\u63a5\u548c\u5206\u53c9\u8fde\u63a5\u3002<\/p>\n\n\n\n
\u8bbe\u5907\u7684\u4ea4\u6d41\u7535\u6e90\u548c\u673a\u7bb1\u5fc5\u987b\u63a5\u5730\u5e76\u826f\u597d\u63a5\u5730\u3002<\/p>\n\n\n\n
\u6709\u5f88\u591a\u5730\u65b9\u770b\u8d77\u6765\u4e09\u89d2\u63d2\u5ea7\u6839\u672c\u6ca1\u6709\u63a5\u5730\uff0c\u6240\u4ee5\u8981\u5c0f\u5fc3\u3002\u63a5\u5730\u826f\u597d\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u8bbe\u5907\u5728\u53d7\u5230\u96f7\u51fb\u6d6a\u6d8c\u548c\u9759\u7535\u79ef\u7d2f\u65f6\u80fd\u591f\u66f4\u597d\u5730\u91ca\u653e\u80fd\u91cf\u3002\u4fdd\u62a4485\u603b\u7ebf\u8bbe\u5907\u53ca\u76f8\u5173\u82af\u7247\u514d\u53d7\u4f24\u5bb3\u3002<\/p>\n\n\n\n
\u907f\u514d\u4e0e\u5f3a\u7535\u4e00\u8d77\u8d70\uff0c\u4ee5\u514d\u5e72\u6270\u3002<\/p>\n\n\n\n
\u9996\u5148\u8981\u505a\u7684\u662f\u786e\u4fdd\u8bbe\u5907\u63a5\u7ebf\u6b63\u786e\u4e14\u4e25\u683c\u7b26\u5408\u89c4\u683c\u3002<\/p>\n\n\n\n
\u5171\u5730\u65b9\u5f0f\uff1a<\/p>\n\n\n\n
\u5c06\u6240\u6709485\u8bbe\u5907\u7684GND\u63a5\u5730\u7528\u4e00\u6839\u7ebf\u6216\u5c4f\u853d\u7ebf\u8fde\u63a5\uff0c\u907f\u514d\u6240\u6709\u8bbe\u5907\u4e4b\u95f4\u7684\u7535\u4f4d\u5dee\u5f71\u54cd\u901a\u8baf\u3002<\/p>\n\n\n\n
\u7ec8\u7aef\u7535\u963b\u6cd5\uff1a\u5728\u6700\u540e\u4e00\u4e2a485\u8bbe\u5907\u7684485+\u548c485-\u5e76\u8054\u4e00\u4e2a120\u6b27\u7684\u7ec8\u7aef\u7535\u963b\uff0c\u63d0\u9ad8\u901a\u8baf\u8d28\u91cf\u3002<\/p>\n\n\n\n
\u4e2d\u6bb5\u4f11\u606f\uff1a<\/p>\n\n\n\n
\u901a\u8fc7\u4e2d\u95f4\u65ad\u5f00\uff0c\u68c0\u67e5\u8bbe\u5907\u662f\u5426\u8fc7\u8f7d\uff0c\u901a\u8baf\u8ddd\u79bb\u662f\u5426\u8fc7\u957f\u3002\u67d0\u53f0\u8bbe\u5907\u635f\u574f\u5f71\u54cd\u6574\u4e2a\u901a\u8baf\u7ebf\u8def\u7b49\u539f\u56e0\u3002<\/p>\n\n\n\n
\u5355\u62c9\u6cd5\uff1a<\/p>\n\n\n\n
\u7b80\u5355\u5730\u4e34\u65f6\u62c9\u4e00\u6839\u7ebf\u5230\u8bbe\u5907\u4e0a\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u6392\u9664\u901a\u8baf\u6545\u969c\u662f\u5426\u662f\u63a5\u7ebf\u5f15\u8d77\u7684\u3002<\/p>\n\n\n\n
\u8f6c\u6362\u5668\u66f4\u6362\uff1a<\/p>\n\n\n\n
\u968f\u8eab\u643a\u5e26\u591a\u4e2a\u8f6c\u6362\u5668\uff0c\u4ee5\u6392\u9664\u8f6c\u6362\u5668\u8d28\u91cf\u662f\u5426\u5f71\u54cd\u901a\u8baf\u8d28\u91cf\u3002<\/p>\n\n\n\n
\u7b14\u8bb0\u672c\u7535\u8111\u8c03\u8bd5\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
\u9996\u5148\u786e\u4fdd\u968f\u8eab\u643a\u5e26\u7684\u7b14\u8bb0\u672c\u7535\u8111\u662f\u901a\u8baf\u6b63\u5e38\u7684\u8bbe\u5907\uff0c\u66f4\u6362\u5ba2\u6237\u7aef\u7535\u8111\u8fdb\u884c\u901a\u8baf\u3002\u5982\u679c\u6709\u53ef\u80fd\uff0c\u8bf4\u660e\u5ba2\u6237\u7535\u8111\u7684\u4e32\u53e3\u53ef\u80fd\u635f\u574f\u6216\u53d7\u4f24\u3002<\/p>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u5728\u4e0e\u7535\u6e90\u7ebf\u76f8\u90bb\u6216\u5728\u540c\u4e00\u5bfc\u7ba1\u4e2d\u8fd0\u884c RS485 \u7535\u7f06\u5417\uff1f
\u4e0d\u53ef\u4ee5\uff0c\u7535\u6e90\u7ebf\u4e0a\u5b58\u5728\u7684\u9ad8\u538b\u548c\u7535\u6d41\u53ef\u80fd\u4f1a\u4ea7\u751f\u5e72\u6270\uff0c\u5982\u679c\u7535\u6e90\u7ebf\u4e0a\u5b58\u5728\u7edd\u7f18\u6545\u969c\u3001\u7535\u5f27\u7b49\uff0c\u53ef\u80fd\u4f1a\u5bf9\u4f4e\u538b RS485 \u7f51\u7ebf\u4ea7\u751f\u5371\u9669\u7535\u538b\u3002<\/p>\n\n\n\n
\u6211\u53ef\u4ee5\u4f7f\u7528 Cat 5e-UTP \u4ee3\u66ff\u5c4f\u853d\u7535\u7f06\u5417\uff1f
\u4e0d\u53ef\u4ee5\u3002Cat 5e-UTP\uff08\u975e\u5c4f\u853d\u53cc\u7ede\u7ebf\uff09\u5728\u8981\u6c42\u4e0d\u9ad8\u7684\u5e94\u7528\u4e2d\u53ef\u4ee5\u5728\u8f83\u77ed\u7684\u8ddd\u79bb\u5185\u5de5\u4f5c\uff0c\u5e76\u5177\u6709\u4f4e EMI \u566a\u58f0\u6c34\u5e73\u3002\u7531\u4e8e\u901a\u5e38\u7528\u4e8e Cat 5 \u7535\u7f06\u7684\u5c0f\u578b \u5b9e\u5fc3\u7ebf\u5f88\u5bb9\u6613\u6298\u65ad\u5e76\u4f7f\u7cfb\u7edf\u4e0d\u53d7\u76d1\u63a7\u3002<\/p>\n\n\n\n
<\/p>\n\n\n\n
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