ÐÂÎÅ×ÊѶ
RS485Òý½Å˵Ã÷¼°½Ó¿Ú˵Ã÷
2020-07-07


  ÔÚEIAµÄ±ê׼ϵÁÐÖУ¬RS485ЭÒé±»ÈÏΪÊÇ×îͨÓõÄ£¬ÔÚ´®¿ÚͨѶµÄ4¸ö±ê×¼ÉϾùÏÔʾ³öÁ¼ºÃµÄÐÔÄÜ¡£µ±¶à¸ö½ÚµãÐèÒªÔÚ¿ØÖÆ»òÊý¾Ý²É¼¯Ó¦ÓÃÖнøÐÐͨÐÅʱ£¬ÕâÊÇRS485±»¹ã·ºÓÃ×÷ͨÐŽӿڵÄÔ­Òò¡£

  RS485ÐźÅÏß¶¨Òå

RS485µÄÒý½ÅDB9±êʾͼ

DB9 ½Ó¿Úָʾ Òý½ÅÃû³Æ
1 CD ÔØ²¨¼ì²â
2 RXD ½ÓÊÕÊý¾Ý
3 TXD ´«ÊäÊý¾Ý
4 DTR Êý¾ÝÖն˾ÍÐ÷
5 GND ϵͳ½ÓµØ
6 DSR Êý¾Ý×¼±¸¾ÍÐ÷
7 RTS ·¢ËÍÇëÇó
8 CTS Çå³þ·¢ËÍ
9 RI ÕñÁåָʾÆ÷

  ÔØ²¨¼ì²â(CD)´Ë¿ØÖÆÐźÅÔÚ´®¿Ú·þÎñÆ÷֪ͨ¼ÆËã»úËüÒѼì²âµ½¼ÆËã»ú¿ÉÒÔÓÃÓÚÊý¾Ý´«ÊäµÄÔØ²¨Ê±Ê¹Óá£

  ½ÓÊÕÊý¾Ý(RXD)ÕâÌõÏßÓÃÓÚÁ½¸öÔ´Ö®¼äµÄÊý¾Ý´«Êä¡£Ò»¸öÀý×ÓÊÇ´Ó´®¿Ú·þÎñÆ÷½ÓÊÕµÄÊý¾Ý´«Êäµ½¼ÆËã»ú¡£

  ´«ÊäÊý¾Ý(TXD)ÕâÊÇʵ¼Ê³ÐÔØ´«ÊäÊý¾ÝµÄÏß·¡£

  Êý¾ÝÖն˾ÍÐ÷(DTR)£¬ÕâÊDZíÃ÷¼ÆËã»úÒÑ×¼±¸ºÃ½øÐд«ÊäµÄÐźÅ¡£

  ϵͳ½ÓµØ(GND)ÊÇÖ¸ÓëµØÃæµÄÎïÀíÁ¬½Ó£¬ÓÃÓÚ²âÁ¿µç·ÖеçѹµÄ»ùÏß»òÓÃÓÚ·µ»ØµçÁ÷µÄ¹²Ïí·¾¶¡£

  ÓëDTRÐźÅÏà±È£¬Êý¾Ý×¼±¸¾ÍÐ÷(DSR)£¬¸ÃÐźÅ֪ͨ¼ÆËã»ú»òÖÕ¶Ë´®¿Ú·þÎñÆ÷ÕýÔÚÔËÐв¢ÇÒÄܹ»½ÓÊÕÊý¾Ý¡£

  ¶ÔÓÚ´ËÐźÅ£¬ÐèÒª·¢ËÍÇëÇó(RTS)Õýµçѹ£¬ÒÔÔÊÐíÖ´Ðз¢ËÍÇëÇó(RTS)¡£Õâ±íÃ÷ÔÚÊý¾Ý¼¯ºÍÊý¾ÝÖÕ¶ËÖ®¼ä¿ÉÒÔ½øÐÐÎÞ¸ÉÈŵĴ«Êä¡£

  ÔÚÊý¾ÝÖն˺ʹ®¿Ú·þÎñÆ÷Ö®¼ä½¨Á¢Á¬½Óºó£¬Çå³ý·¢ËÍ(CTS)·¢ËÍ´ËÐźÅ£¬ÒÔÈ·ÈÏÊý¾ÝÖÕ¶ËÒÑÈ·ÈÏ¿ÉÒÔ¿ªÊ¼Í¨ÐÅ¡£

  ÕñÁåָʾÆ÷(RI)µÄ×÷ÓÃÊÇÌáÐÑÔËÐÐÊý¾Ý¼¯µÄ´®¿Ú·þÎñÆ÷ÒѼì²âµ½µÍƵ¡£¸ÃÐźÅÖ»ÊǾ¯¸æÊý¾ÝÖÕ¶Ë£¬¶ø²»»áÓ°ÏìÉ豸֮¼äµÄÊý¾Ý´«Êä¡£

  Òý½Å·ÖÅäͨ¹ý2ºÍ4¸ö´¥µãÁ¬½Óµ½DB9ºÍDB25Á¬½ÓÆ÷

9ÕëRS485Òý½ÅÅÅÁÐ

ͼ2ÊÇRS485Òý½ÅDB9Á¬½ÓÆ÷µÄRS485½ÓÏßͼ

DB25µÄRS485Òý½ÅÅäÖÃ

  ͼ3ÊÇ25ÕëRS485Òý½Å°ëË«¹¤ºÍȫ˫¹¤Òý½ÅÁ¬½ÓÆ÷µÄÒý½Åͼ

  DB25ÕëµÄTxD +ºÍTxD-Ïß´«Êä·¢ËÍÊý¾Ý£¬¶øRxD +ºÍRxD-Ïß°üº¬½ÓÊÕÊý¾Ý¡£ÓÉÓÚ²î·ÖÐźÅÔ­Òò£¬ÕâЩÐźŵĴ«Êä¾àÀë¸ü´ó¡£

  RS485½Ó¿ÚʵÏÖÔÚ¸üÔ¶µÄ¾àÀëºÍ¸üºÃµÄÊý¾ÝËÙÂʵÄÐÔÄÜÉÏ£¬±ÈRS232ЭÒé´«Ê䷽ʽ¸üÓÅÔ½¡£×10Ã׵ľàÀëÖ§³Ö30-35 MbpsµÄ´«ÊäËÙ¶È¡£ÔÚ³¤´ï1200Ã׵ľàÀëÉÏ¿ÉÒÔʵÏÖ100KbpsµÄÊý¾ÝËÙÂÊ¡£RS485Ê×ÒªÓÃÓÚÀûÓÃÆäÆ½ºâ²î·Ö½Ó¿ÚµÄ¶àµãÅäÖÃÖС£

  ÈçRS485µçÀÂÒý½ÅÅÅÁÐÖÐËùʾ£¬¸Ã½Ó¿Ú¾ßÓвî·ÖÅäÖõÄËùÓÐÐźÅ¡£

  ¡ñ CTS +ºÍCTS-ÒÔ¼°RTS +ºÍRTS-ÐźŶ¼±»ÓÃ×÷ÎÕÊÖ¿ØÖÆÐźÅ¡£

  ¡ñ TxD +ºÍTxD-Ö´ÐÐÊý¾Ý´«Êä¡£

  ¡ñ RxD +ºÍRxD-ÊÇÓÃÓÚÊÕ¼¯Êý¾ÝµÄÐС£

  ¶àµãÅäÖÿɽ«¶à´ï32¸öÉ豸ÓëÒ»¸ö¿ØÖÆÖ÷É豸Á¬½Ó¡£VSAT NMS(ÍøÂ羭Ӫϵͳ)¾ÍÊÇÒ»¸öÀý×Ó¡£ÔÚ´ËʵÏÖÖУ¬ÔÚPCÉÏÔËÐеÄÈí¼þ¿ÉÒÔ¼àÊӺͿØÖƸ÷ÖÖ×Óϵͳ¡£ÆäÖаüº¬MUX£¬µ÷ÖÆ½âµ÷Æ÷£¬RFÉÏ/ÏÂ±äÆµÆ÷ÒÔ¼°ÆäËûÍøÂç×é¼þ¡£ÎªÁËʹÕâÖÖÀàÐ͵ÄʵʩÕý³£¹¤×÷£¬ÔÚÔËÐÐNMSÓ¦ÓóÌÐòµÄPCÒÔ¼°ËùÓÐÁ¬½ÓµÄ×ÓϵͳÉÏ£¬ÐèÒªÕýÈ·½ÓÏßµÄRS485Á¬½ÓÆ÷¡£

  RS485½Ó¿Ú˵Ã÷

  RS485(EIA485)½Ó¿ÚÒѱ»Ö¤Ã÷¾ßÓм«Ç¿µÄ³°ôÐÔ£¬²¢ÇÒÓÉÓÚÆä¶àµãÍØÆË½á¹¹¶ø³ÉΪ¹¤ÒµÉÏ×îÁ÷ÐеÄͨÐÅЭÒé¡£RS422ЭÒéÓëRS485µÄÏàËÆÖ®´¦ÔÚÓÚÁ½Õß¶¼Ê¹Óòî·ÖÐźŽøÐÐÊý¾Ý´«Êä¡£

  RS485ÓÐÁ½ÖÖÀàÐÍ£º

  ¡ñ °ëË«¹¤RS485¾ßÓÐ2¸ö´¥µã

  ¡ñ ÔÚȫ˫¹¤Ä£Ê½ÏÂʹÓÃRS485 4¸ö´¥µã¡£

  µ±ÄúÐèÒªÄܹ»Í¬Ê±·¢ËͺͽÓÊÕÊý¾Ýʱ£¬¿ÉÒÔʹÓÃȫ˫¹¤Ä£Ê½¡£ÔÚ°ëË«¹¤Ä£Ê½Ï£¬ÄúÖ»ÄÜÔÚÈκθø¶¨Ê±¼ä·¢ËÍ»ò½ÓÊÕÊý¾Ý¡£

  Ïß·Éϵĵçѹ·¶Î§Îª-7 VÖÁ+12V¡£

  ûÓÐÓÃÓÚʵÏÖRS485ЭÒéµÄÌØ¶¨Á¬½ÓÆ÷ÀàÐÍ£¬µ«ÊÇÔÚ´ó¶àÊýÇé¿öÏ£¬¶¼Ê¹ÓÃDB9Á¬½ÓÆ÷»ò¶Ë×Ó¿é¡£

  ÌØ¶¨µÄRS485Á¬½ÓÆ÷¿ÉÄܾßÓв»Í¬µÄÒý½ÅÅÅÁС£Äú½«Äܹ»¸ù¾ÝÉè±¸Ëæ¸½µÄÎĵµÈ·¶¨Êµ¼ÊÅäÖá£

 RS485Òý½Å·ÖÅä°ëË«¹¤

ͼ4£ºÓÃ2¸ö´¥µãÁ¬½ÓRS485É豸¡ª¡ªRS485Òý½Å°ëË«¹¤·ÖÅä

RS485ȫ˫¹¤Òý½ÅÅÅÁÐ


ͼ5£ºÓÃ4¸ö´¥µãÁ¬½ÓRS485É豸¡ª¡ªRS485Òý½Åȫ˫¹¤·ÖÅä


¹Ø×¢galaxyÒøºÓ¹ú¼Ê΢ÐŹ«ÖÚºÅ
Á˽â¸ü¶àÐÅÏ¢

sitemap¡¢µØÍ¼