11223344DDCCBBAATitleNumberRevisionSizeA4Date:2014/7/7 星期一Sheet ofFile:E:\PCB\..\RS485 Board.SchDocDrawn By:RO1RE2DE3DI4GND5A6B7VCC8U148512345485.J1485.R1120R1-2+34485.DB1RODIDIRORSERSEABGNDGNDVCCVCCBA485.R2485.C1GND12485.J2Header 212485.H2Header 2ABL1VCCGNDPOWER LED1KR1aveshareWwaveshare_logophone.Aphone.BA1COM2B3JP.P1JPAD3phone.AA1COM2B3JP.P2JPAD3phone.BAABB