How to connect a TTL device to this TTL to RS485 module ?

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Hi,

did you read MAX485 datasheet?

What else do you need to know?

Klaus
 

I just need the connection (wiring diagram) between Arduino and SR 04 US Sensor where TTL to MAX485 module shown in post 1 is used inbetween Arduino Mega2560 and US Sensor.
 

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