Self-detecting and self-recovery RS485 communication circuit
The utility model provides a self-detecting and self-recovery RS485 communication circuit comprising a first communication circuit comprising a first 485 chip and a second communication circuit comprising a second 485 chip. The eighth pins of the first and the second 485 chips are connected to a col...
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| creator | XUE LEI WU HAIQIANG ZHOU JIEWEN REN ZHIREN |
| description | The utility model provides a self-detecting and self-recovery RS485 communication circuit comprising a first communication circuit comprising a first 485 chip and a second communication circuit comprising a second 485 chip. The eighth pins of the first and the second 485 chips are connected to a collector of a PNP audion, the sixth pin and the seventh pin of the first 485 chip are respectively connected to an A terminal and a B terminal of a 485 bus, the seventh pin and the sixth pin of the second 485 chip are respectively connected to the A terminal and the B terminal of the 485 bus. The sixth pin of the 485 chip is connected to the collector of the PNP audion through a pull-up resistor. A base of the PNP audion is connected to a 485 communication control terminal, an emitter of the PNP audion is connected to a power source, the seventh pin is connected to a collector of a NPN audion through a pull-down resistor, a base of the NPN audion is connected to the collector of the PNP audion, and the emitter of the NPN audion is grounded. The self-detecting and self-recovery RS485 communication circuit can automatically switch work states of two communication circuits and maintain normal communication. |
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The eighth pins of the first and the second 485 chips are connected to a collector of a PNP audion, the sixth pin and the seventh pin of the first 485 chip are respectively connected to an A terminal and a B terminal of a 485 bus, the seventh pin and the sixth pin of the second 485 chip are respectively connected to the A terminal and the B terminal of the 485 bus. The sixth pin of the 485 chip is connected to the collector of the PNP audion through a pull-up resistor. A base of the PNP audion is connected to a 485 communication control terminal, an emitter of the PNP audion is connected to a power source, the seventh pin is connected to a collector of a NPN audion through a pull-down resistor, a base of the NPN audion is connected to the collector of the PNP audion, and the emitter of the NPN audion is grounded. 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The eighth pins of the first and the second 485 chips are connected to a collector of a PNP audion, the sixth pin and the seventh pin of the first 485 chip are respectively connected to an A terminal and a B terminal of a 485 bus, the seventh pin and the sixth pin of the second 485 chip are respectively connected to the A terminal and the B terminal of the 485 bus. The sixth pin of the 485 chip is connected to the collector of the PNP audion through a pull-up resistor. A base of the PNP audion is connected to a 485 communication control terminal, an emitter of the PNP audion is connected to a power source, the seventh pin is connected to a collector of a NPN audion through a pull-down resistor, a base of the NPN audion is connected to the collector of the PNP audion, and the emitter of the NPN audion is grounded. The self-detecting and self-recovery RS485 communication circuit can automatically switch work states of two communication circuits and maintain normal communication.</description><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2015</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAJTs1J001JLUlNLsnMS1dIzEtRKAYJFaUm55elFlUqBAWbWJgqJOfn5pbmZSYnlmTm5ykkZxYll2aW8DCwpiXmFKfyQmluBiU31xBnD93Ugvz41OKCxOTUvNSSeGc_IwMTQ2NDUxPj0FBjohQBAA_oMBs</recordid><startdate>20150128</startdate><enddate>20150128</enddate><creator>XUE LEI</creator><creator>WU HAIQIANG</creator><creator>ZHOU JIEWEN</creator><creator>REN ZHIREN</creator><scope>EVB</scope></search><sort><creationdate>20150128</creationdate><title>Self-detecting and self-recovery RS485 communication circuit</title><author>XUE LEI ; WU HAIQIANG ; ZHOU JIEWEN ; REN ZHIREN</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN204131543UU3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2015</creationdate><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION</topic><toplevel>online_resources</toplevel><creatorcontrib>XUE LEI</creatorcontrib><creatorcontrib>WU HAIQIANG</creatorcontrib><creatorcontrib>ZHOU JIEWEN</creatorcontrib><creatorcontrib>REN ZHIREN</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>XUE LEI</au><au>WU HAIQIANG</au><au>ZHOU JIEWEN</au><au>REN ZHIREN</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Self-detecting and self-recovery RS485 communication circuit</title><date>2015-01-28</date><risdate>2015</risdate><abstract>The utility model provides a self-detecting and self-recovery RS485 communication circuit comprising a first communication circuit comprising a first 485 chip and a second communication circuit comprising a second 485 chip. The eighth pins of the first and the second 485 chips are connected to a collector of a PNP audion, the sixth pin and the seventh pin of the first 485 chip are respectively connected to an A terminal and a B terminal of a 485 bus, the seventh pin and the sixth pin of the second 485 chip are respectively connected to the A terminal and the B terminal of the 485 bus. The sixth pin of the 485 chip is connected to the collector of the PNP audion through a pull-up resistor. A base of the PNP audion is connected to a 485 communication control terminal, an emitter of the PNP audion is connected to a power source, the seventh pin is connected to a collector of a NPN audion through a pull-down resistor, a base of the NPN audion is connected to the collector of the PNP audion, and the emitter of the NPN audion is grounded. The self-detecting and self-recovery RS485 communication circuit can automatically switch work states of two communication circuits and maintain normal communication.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION |
| title | Self-detecting and self-recovery RS485 communication circuit |
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