DK04 Monitoring Module and Computer communication interface circuit

Published:2011/8/22 21:09:00 Author:muriel | Keyword: Monitoring Module, Computer communication interface circuit | From:SeekIC

As shown in figure, D187 is an UART, it'sRX / TX signalconnectedonoptocoupler N21, N22 and N29, so that put the RS-485communication interface receiver / transmitter D28and microprocessor D211 completely optoelectronicisolated. D197 is a generator, the currently communication rate is 9600bit / s. D189 is another universal asynchronous receiver transmitter. Optocouplers N204 and N206 areisolated the local RS-232 communication port and the microprocessor D211 completely. D209 canmake a single 5V voltage transform into ± l2V communications special RS-232 drive chip.



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