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One 3V RS-485 driver is communicating with a 5V RS-485 driver?

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xxtigerxx

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Does anyone knows if a have a 3V RS-485 driver like (MAX3485) is communicating with a RS-485 in 5V.

;-)
 

Definition of the RS-485 standard is independent of driver supply voltage. Both are fully interoperable.
 

Thank you for the information FvM.

But the driver of 3.3V keep the line in idle at 1.6V and the 5V keep the line in idle at 2.5V.

So can i have a distance of 500-600m with this connection?
 

Idle level doesn't count as long it's within the transceivers common mode. Differential voltage is used for signaling, the threshold is only several 100 mV. 600 m is no problem with respective baud rates, see datasheets.
 

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