Part Number:SN65HVD3082E
Hi
We use SN65HVD3082EDR to convert UART to RS485
But why the signal is abnormal
Please help clarify the problem
CH2 : RS-485 input (pin6 and pin7)
CH3 : Enable signal (pin2 and pin3)
CH4 : UART output signal (pin1)
Schematic as below
Amy Luo:
您好,
RS485总线上有几个节点?您是否连接了终端电阻RT?
关于失效保护偏置电路,请参考下面FAQ:
https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1042936/sn65hvd3082e-faq-external-pull-up-pull-down-resistors-for-sn65hvd3082e/3857900?tisearch=e2e-sitesearch&keymatch=SN65HVD3082E%20%20Failsafe#3857900
,
Ceano Huang:
Hi
目前線上有二個節點, 有試過加上終端電阻, 情況一樣
,
Amy Luo:
您拆掉R17和R21,再看信号是否正常?