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1¡B½u¹ï2ªä¡]2x24AWG¡^¡]2*0.2¡^¡]2*0.5¡^¡]2*0.75¡^¡]2*1.0¡^¡]2*1.5¡^¦hªÑµ±¦XÁá¿ü»Éµ·¡APEµ´½tÅ@®M¡F¬°¾A¥Î©ó´_Âøªº¤u·~¾¸ÁnÀô¹Ò¡A¯S±Ä¥Î¾Tºä/»Eà´_¦X±a100%«Ì½ª²v+Áá¿ü»É½s¨îºô90%«Ì½ª²v¦@Âù««Ì½ª¡A¨Ãªþ¦³¿W¥ßTC±µ¦a¾ÉÅé¡A¤u·~¦Ç¦âPVC¥~Å@®M¡A¯S©Êªý§Ü120¼Ú©i
Line of 2 core (2x24AWG) (2*0.2) (2*0.5) (2 * 0.75) (2*1.0) (2 * 1.5) multi strand stranded tinned copper, PE insulating sheath; is suitable to be used in complex industrial environment noise, the aluminum foil / polyester composite with 100% shield rate + tinned copper preparation of net 90% shielding rate is double screen, accompanied by independent TC grounding conductor, industrial gray PVC outer sheath, the characteristic impedance of 120 ohm http://www.anhdl.com
2¡B½u¹ï4ªä¡]2x 2x24AWG¡^¡]2*2*0.2¡^¡]2*2*0.5¡^¡]2*2*0.75¡^¡]2*2*1.0¡^¡]2*2*1.5¡^¦hªÑµ±¦XÁá¿ü»Éµ·¡APEµ´½tÅ@®M¡F¬°¾A¥Î©ó´_Âøªº¤u·~¾¸ÁnÀô¹Ò¡A¯S±Ä¥Î¾Tºä/»Eà´_¦X±a100%«Ì½ª²v+Áá¿ü»É½s¨îºô90%«Ì½ª²v¦@Âù««Ì½ª¡A¨Ãªþ¦³¿W¥ßTC±µ¦a¾ÉÅé¡A¤u·~¦Ç¦âPVC¥~Å@®M¡A¯S©Êªý§Ü120¼Ú©i ¡C
Line of 4 core (2x 2x24AWG) (2*2*0.2) (2*2*0.5) 2*2*0.75 (2*2*1.0) (2*2*1.5) multi strand stranded tinned copper wire, PE insulating sheath; is suitable to be used in complex industrial environment noise, the aluminum foil / polyester composite with 100% shield rate + tinned copper preparation of net 90% shielding rate is double screen, accompanied by independent TC grounding conductor, industrial gray PVC outer sheath, the characteristic impedance of 120 ohm.
RS-485³q°T¹qÆl¦b¤@¯ë³õ¦X±Ä¥ÎÂùµ±½u´N¥i¥H¡A¦ý¦bn¨D¤ñ¸û°ªªºÀô¹Ò¤U¥i¥H±Ä¥Î±a«Ì½ª¼hªºÂùµ±¹qÆl¡C¦b¨Ï¥ÎRS485³q°T®É¡A¹ï©ó¯S©wªº¶Ç¿é½u¸ô¡A¥D¾÷¡]¥l´ú³]³Æ¡^¨ì»öªíªº485¤f¶¡ªº¹qÆlªø«×»P¼Æ¾Ú«H¸¹¶Ç¿éªºªi¯S²v¦¨¤Ï¤ñ¡F³oÓªø«×¥Dn¨ü«H¸¹ªº¥¢¯u¥H¤Î¾¸Ánªº¼vÅT©Ò¼vÅT¡C²z½×¤WRS485ªº¶Ç¿é¶ZÂ÷¯à¹F¨ì1200¦Ì¡A¦ý¹ê»ÚÀ³¥Î¤¤¶Ç¿é¶ZÂ÷n¤p©ó1200¦Ì¡A¨ãÅéªø«×¨ü©P³òªºÀô¹Ò¼vÅT¡C
RS-485 communication cable in general occasion using twisted pair can be, but under the high requirement of environment can be using tape shielded twisted pair cables. When using RS485 communication, for specific transmission lines, the host (called measurement equipment) to the meter 485 ports between the length of cable and the data signal transmission baud rate inversely proportional; the length is mainly affected by the signal distortion and the influence of the noise influence. On the theory of RS485 and the transmission distance can reach 1200 meters, but the actual application in the transmission distance is less than 1200 meters, the length is influenced by the environment around. http://www.anhdl.com
¦b§C³t¡Bµu¶ZÂ÷¡BµL·FÂZªº³õ¦X¥i¥H±Ä¥Î´¶³qªºÂùµ±½u¡A¤Ï¤§¡A¦b°ª³t¡Bªø½u¶Ç¿é®É¡A«h±Ä¥Îªý§Ü¤Ç°t(¤@¯ë¬°120£[)ªºRS485¹qÆl(STP-120£[(for RS485 & CAN) one pair 18 AWG)¡A¦Ó¦b·FÂZ´c¦HªºÀô¹Ò¤UÁÙÀ³±Ä¥ÎñZ¸Ë«¬Âùµ±«Ì½ª¹qÆl(ASTP-120£[(for RS485 & CAN) one pair 18 AWG)¡C¦b¨Ï¥ÎRS485±µ¤f®É¡A¹ï©ó¯S©wªº¶Ç¿é½u¸ô¡A±qRS485±µ¤f¨ìt¸ü¨ä¼Æ¾Ú«H¸¹¶Ç¿é©Ò¤¹³\ªºzui¤j¹qÆlªø«×»P«H¸¹¶Ç¿éªºªi¯S²v¦¨¤Ï¤ñ¡A³oÓªø«×¼Æ¾Ú¥Dn¬O¨ü«H¸¹¥¢¯u¤Î¾¸Ánµ¥¼vÅT©Ò¼vÅT¡C²z½×¤W¡A³q«H³t²v¦b100Kpbs¤Î¥H¤U®É¡ARS485ªºzuiªø¶Ç¿é¶ZÂ÷¥i¹F1200¦Ì¡A¦ý¦b¹ê»ÚÀ³¥Î¤¤¶Ç¿éªº¶ZÂ÷¤]¦]ªä¤ù¤Î¹qÆlªº¶Ç¿é¯S©Ê¦Ó©Ò®t²§¡C¦b¶Ç¿é¹Lµ{¤¤¥i¥H±Ä¥Î¼W¥[¤¤Ä~ªº¤èªk¹ï«H¸¹¶i¦æ©ñ¤j¡Azui¦h¥i¥H¥[¤KÓ¤¤Ä~¡A¤]´N¬O»¡²z½×¤WRS485ªºzui¤j¶Ç¿é¶ZÂ÷¥i¥H¹F¨ì9.6¤½²z¡C¦pªG¯u»Ýnªø¶ZÂ÷¶Ç¿é¡A¥i¥H±Ä¥Î¥úÅÖ¬°¶Ç¼½¤¶½è¡A¦¬µo¨âºÝ¦U¥[¤@Ó¥ú¹qÂà´«¾¹¡A¦h¼Ò¥úÅÖªº¶Ç¿é¶ZÂ÷¬O5~10¤½ùØ¡A¦Ó±Ä¥Î³æ¼Ò¥úÅÖ¥i¹F50¤½ùتº¶Ç¼½¶ZÂ÷¡C
At low speed and short distance, without the interference of occasions can use ordinary twisted pair. On the contrary, in the high speed and long distance transmission, you must use impedance matching (generally 120 Ohm) RS485 special cable (STP-120 omega (for RS485 & can) one pair 18 AWG), and under the severe jamming environment should also use type sheathed shielded twisted pair cable (ASTP-120 omega (for RS485 & can) one pair 18 AWG). When using the RS485 interface, for specific transmission lines, from RS485 interface to load the baud rate of the data signal transmission allows maximum cable length and signal transmission is inversely proportional to, the length of the data is mainly by signal distortion and noise influence the effect. In theory, the communication speed in 100Kpbs and below, the longest transmission distance of RS485 up to 1200 meters, but the actual application of the transmission distance is also due to the transmission characteristics of the chip and the difference between the cable. In the transmission process can be used to increase the relay method to amplify the signal, up to eight relay, that is, the theory of the maximum transmission distance of RS485 can achieve the 9.6 axiom. If you really need to long distance transmission, using optical fiber as the transmission medium, the sending and receiving ends of the photoelectric converters and multimode fiber transmission distance is 5 to 10 km, and a single mode fiber (up to 50 km of the propagation distance.
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2*0.2 | 4*0.2 | 6*0.2 |
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2*0.5 | 4*0.5 | 6*0.5 |
2*0.75 | 4*0.75 | 6*0.75 |
2*1.0 | 4*1.0 | 6*1.0 |
2*1.5 | 4*1.5 | 6*1.5 |
2*2.0 | 4*2.0 | 6*2.0 |
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8*0.2 | 10*0.2 | 12*0.2 |
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8*0.5 | 10*0.5 | 12*0.5 |
8*0.75 | 10*0.75 | 12*0.75 |
8*1.0 | 10*1.0 | 12*1.0 |
8*1.5 | 10*1.5 | 12*1.5 |
8*2.0 | 10*2.0 | 12*2.0 |
8*2.5 | 10*2.5 | 12*2.5 |
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