rs232转rs485转换器怎么通信不了 用两个RS232/RS485转换器进行转换后不能通讯
rs232\u8f6c\u6362rs485\u4e2d\u95f4\u7684\u8f6c\u6362\u5668\u600e\u4e48\u6fc0\u6d3b\uff0c\u7535\u8111\u5173\u673a\u540e\u6ca1\u6709\u901a\u4fe1\u4e86\u5982\u56fe\u4ec0\u4e48\u662fRS-232\uff1f
RS-232\uff08ANSI/EIA-232\u6807\u51c6\uff09\u662fIBM-PC\u53ca\u5176\u517c\u5bb9\u673a\u4e0a\u7684\u4e32\u884c\u8fde\u63a5\u6807\u51c6\u3002\u53ef\u7528\u4e8e\u8bb8\u591a\u7528\u9014\uff0c\u6bd4\u5982\u8fde\u63a5\u9f20\u6807\u3001\u6253\u5370\u673a\u6216\u8005Modem\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u63a5\u5de5\u4e1a\u4eea\u5668\u4eea\u8868\u3002\u7528\u4e8e\u9a71\u52a8\u548c\u8fde\u7ebf\u7684\u6539\u8fdb\uff0c\u5b9e\u9645\u5e94\u7528\u4e2dRS-232\u7684\u4f20\u8f93\u957f\u5ea6\u6216\u8005\u901f\u5ea6\u5e38\u5e38\u8d85\u8fc7\u6807\u51c6\u7684\u503c\u3002
RS-232\u53ea\u9650\u4e8ePC\u4e32\u53e3\u548c\u8bbe\u5907\u95f4\u70b9\u5bf9\u70b9\u7684\u901a\u4fe1\u3002RS-232\u4e32\u53e3\u901a\u4fe1\u6700\u8fdc\u8ddd\u79bb\u662f50\u82f1\u5c3a\u3002
\ 1 2 3 4 5 /
\ 6 7 8 9 /
RS-232\u9488\u811a\u7684\u529f\u80fd\uff0c\u4ee59\u9488\u63a5\u5934\u4e3a\u4f8b\u4ecb\u7ecd\uff1a
\u6570\u636e\uff1aTXD\uff08pin 3\uff09\uff1a\u4e32\u53e3\u6570\u636e\u8f93\u51fa
RXD\uff08pin 2\uff09\uff1a\u4e32\u53e3\u6570\u636e\u8f93\u5165
\u63e1\u624b\uff1aRTS\uff08pin 7\uff09\uff1a\u53d1\u9001\u6570\u636e\u8bf7\u6c42
CTS\uff08pin 8\uff09\uff1a\u6e05\u9664\u53d1\u9001
DSR\uff08pin 6\uff09\uff1a\u6570\u636e\u53d1\u9001\u5c31\u7eea
DCD\uff08pin 1\uff09\uff1a\u6570\u636e\u8f7d\u6ce2\u68c0\u6d4b
DTR\uff08pin 4\uff09\uff1a\u6570\u636e\u7ec8\u7aef\u5c31\u7eea
\u5730\u7ebf\uff1aGND\uff08pin 5\uff09\uff1a\u5730\u7ebf
\u5176\u4ed6 RI\uff08pin 9\uff09\uff1a\u94c3\u58f0\u6307\u793a
\u4ec0\u4e48\u662fRS-422\uff1f
RS-422\uff08EIA RS-422-A Standard\uff09\u662fApple\u7684Macintosh\u8ba1\u7b97\u673a\u7684\u4e32\u53e3\u8fde\u63a5\u6807\u51c6\u3002RS-422\u4f7f\u7528\u5dee\u5206\u4fe1\u53f7\uff0cRS-232\u4f7f\u7528\u975e\u5e73\u8861\u53c2\u8003\u5730\u7684\u4fe1\u53f7\u3002\u5dee\u5206\u4f20\u8f93\u4f7f\u7528\u4e24\u6839\u7ebf\u53d1\u9001\u548c\u63a5\u6536\u4fe1\u53f7\uff0c\u5bf9\u6bd4RS-232\uff0c\u5b83\u80fd\u66f4\u597d\u7684\u6297\u566a\u58f0\u548c\u6709\u66f4\u8fdc\u7684\u4f20\u8f93\u8ddd\u79bb\u3002\u5728\u5de5\u4e1a\u73af\u5883\u4e2d\u66f4\u597d\u7684\u6297\u566a\u6027\u548c\u66f4\u8fdc\u7684\u4f20\u8f93\u8ddd\u79bb\u662f\u4e00\u4e2a\u5f88\u5927\u7684\u4f18\u70b9\u3002
\u4ec0\u4e48\u662fRS-485\uff1f
RS-485\uff08EIA-485\u6807\u51c6\uff09\u662fRS-422\u7684\u6539\u8fdb\uff0c\u56e0\u4e3a\u5b83\u589e\u52a0\u4e86\u8bbe\u5907\u7684\u4e2a\u6570\uff0c\u4ece10\u4e2a\u589e\u52a0\u523032\u4e2a\uff0c\u540c\u65f6\u5b9a\u4e49\u4e86\u5728\u6700\u5927\u8bbe\u5907\u4e2a\u6570\u60c5\u51b5\u4e0b\u7684\u7535\u6c14\u7279\u6027\uff0c\u4ee5\u4fdd\u8bc1\u8db3\u591f\u7684\u4fe1\u53f7\u7535\u538b\u3002\u6709\u4e86\u591a\u4e2a\u8bbe\u5907\u7684\u80fd\u529b\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5355\u4e2aRS-422\u53e3\u5efa\u7acb\u8bbe\u5907\u7f51\u7edc\u3002\u51fa\u8272\u6297\u566a\u548c\u591a\u8bbe\u5907\u80fd\u529b\uff0c\u5728\u5de5\u4e1a\u5e94\u7528\u4e2d\u5efa\u7acb\u8fde\u5411PC\u673a\u7684\u5206\u5e03\u5f0f\u8bbe\u5907\u7f51\u7edc\u3001\u5176\u4ed6\u6570\u636e\u6536\u96c6\u63a7\u5236\u5668\u3001HMI\u6216\u8005\u5176\u4ed6\u64cd\u4f5c\u65f6\uff0c\u4e32\u884c\u8fde\u63a5\u4f1a\u9009\u62e9RS-485\u3002
RS-485\u662fRS-422\u7684\u8d85\u96c6\uff0c\u56e0\u6b64\u6240\u6709\u7684RS-422\u8bbe\u5907\u53ef\u4ee5\u88abRS-485\u63a7\u5236\u3002RS-485\u53ef\u4ee5\u7528\u8d85\u8fc74000\u82f1\u5c3a\u7684\u7ebf\u8fdb\u884c\u4e32\u884c\u901a\u884c\u3002
DB-9 \u5f15\u811a\u8fde\u63a5
\ 1 2 3 4 5 /
\ 6 7 8 9 /
RS-485\u548cRS-422\u7684\u5f15\u811a\u7684\u529f\u80fd\uff0c\u4ee59\u9488\u63a5\u5934\u4e3a\u4f8b\u4ecb\u7ecd
\u6570\u636e\uff1aTXD+\uff08pin 8\uff09\uff0cTXD-\uff08pin 9\uff09\uff0c
RXD+\uff08pin 4\uff09\uff0cRXD-\uff08pin 5\uff09
\u63e1\u624b\uff1aRTS+\uff08pin 3\uff09\uff0cRTS-\uff08pin 7\uff09\uff0c
CTS+\uff08pin 2\uff09\uff0cCTS-\uff08pin 6\uff09
\u5730\u7ebf\uff1aGND \uff08pin 1\uff09
1,\u4f60\u5148\u786e\u8ba4\u4e0b2\u4e2a\u8f6c\u6362\u5668\u5206\u522b\u662f\u4e0d\u662f\u597d\u7684\uff0c\u7136\u540e\u518d\u901a\u8baf
2\uff0c\u4f60\u75282\u4e2a\u8f6c\u6362\u5668 \u6211\u60f3\u662f\u4e0d\u662f\u56e0\u4e3a\u4eea\u5668\u7684\u63a5\u53e3\u4e0d\u5339\u914d\uff0c\u624d\u9020\u6210\u4f60\u4e0d\u80fd\u76f4\u63a5\u7528\u4e00\u4e2a\u8f6c\u6362\u5668\u7684\uff0c\u4f60\u53ef\u4ee5\u4e70\u4e2a\u5355\u72ec\u5339\u914d\u63a5\u53e3\u7684\u8fde\u63a5\u7ebf\uff0c\u7136\u540e\u7528\u4e00\u4e2a\u8f6c\u6362\u5668\u5c31\u884c\u4e86\uff0c\u800c\u4e14\u4ef7\u683c\u6bd4\u4f60\u75282\u4e2a\u8f6c\u6362\u5668\u8fd8\u4fbf\u5b9c
3\uff0c\u4f60\u4e0d\u80fd\u901a\u8baf\u4e0d\u89c1\u5f97\u662f\u8f6c\u6362\u5668\u7684\u95ee\u9898\uff0c\u4e5f\u6709\u53ef\u80fd\u662f\u4f60\u7684\u901a\u8baf\u534f\u8bae\u4e0d\u5bf9\uff0c\u6216\u8005\u6ca1\u6709\u8bbe\u7f6e\u597d\uff0c\u6bd4\u5982\u6ce2\u7279\u7387\u4ec0\u4e48\u7684\u3002
4\uff0c2\u4e2a\u8f6c\u6362\u5668\u4e4b\u95f4\u8fde\u63a5\u7ebf\u6709\u591a\u957f\uff0c\u592a\u957f\u4e86\u53d7\u5230\u5e72\u6270\u4e5f\u4e0d\u80fd\u901a\u8baf\u7684\u3002\u6700\u597d\u7528\u5c4f\u853d\u7ebf\u8fdb\u884c\u8fde\u63a5\uff01
\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01
\u6ca1\u5929\u7406\u554a\uff0c\u522b\u4eba\u590d\u5236\u6211\u7684 TMD \u4e5f\u80fd\u522b\u91c7\u7eb3\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01
通信距离是有要求的，是不是太远了？还是有干扰源（比如接触器、继电器线圈工作）？
还是接线错了？
是有源的转换器吗？这个东西最好买好的，用起来稳定，价格也就几十元的事情。
1、与显卡没有任何关系吧？
2、每种rs232转rs485转换器都有自己的适用范围的
常见的无源转换器 需要从串口窃电，显然 对 串口有一定的要求，否则窃电不成功，转换器就无法正常工作
3、连接方法是否正确》？
多看看说明书 吧
请看 武汉鸿伟光电
E485B RS232/RS485有源隔离转换器
无源的通讯转换器是很容易损坏的
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绛旓細锛嶏紞锛 鎯宠璁 MAX485 鍙戦1锛屼护鍏跺浜庢帴鏀剁姸鎬佸嵆鍙紝瀵规柟鍗冲彲鏀跺埌1锛涙兂瑕佽 MAX485 鍙戦0锛屼护鍏跺彂閫侀浂鍗冲彲銆備粩缁嗗垎鏋愭湰鐢佃矾鍗冲彲鐪嬪嚭锛氭湰鏂瑰浜庢帴鏀舵椂锛屼絾鏄鏂逛篃鎺ユ敹锛屾湰鏂癸紝鏀跺埌鐨勫氨鏄1銆傦紞锛嶏紞 鍥句腑鏈宸﹁竟锛232鎺ュ彛锛屾涓棿鐨3鑴氾紝鏄疨C鏈虹殑杈撳嚭銆傚畠杈撳嚭1锛屽氨鏄紞12V锛岀粡杩嘓IN232鍙嶇浉鍙樻崲鍚庯紝...
绛旓細鏈 RS232 杩滅▼鏀跺彂妯″潡锛岃鐪 姝︽眽楦夸紵鍏夌數 E232Y RS-232鏃犳簮闅旂杩滅▼鏀跺彂鍣 RS232鏄叏鍙屽伐锛RS485鏄崐鍙屽伐锛232杞485 鍚庯紝骞朵笉褰卞搷 鍙屽悜浼犺緭 RS485鏄崐鍙屽伐锛屽彧鑳藉簲绛斿紡锛佺О涓 涓讳粠寮 閫氫俊
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绛旓細鍔炴硶寰堢畝鍗 1 纭鐢佃剳涓232绔彛鏄惁鏈夐棶棰橈紝棣栧厛鎵句竴涓232鐨勬瘝澶淬傛妸2銆3绠¤剼鐭帴锛岀敤涓茶鍔╂墜鍙戞暟鎹傚姝ｅ父鍒欏簲鏈夋暟鎹弽鍥炴潵銆2 鎻掓嫈232杞485锛屽湪鐢佃剳纭欢灞炴ч噷杈瑰簲鏈夊搷搴旓紝濡傛棤鍝嶅簲鍒欐湁闂 3 232杞485鏈変簺鏄渶瑕
