Jul 15, 2011 #1 X xxtigerxx Advanced Member level 1 Joined Jun 5, 2001 Messages 441 Helped 38 Reputation 76 Reaction score 32 Trophy points 1,308 Location Greece Activity points 2,890 Does anyone knows if a have a 3V RS-485 driver like (MAX3485) is communicating with a RS-485 in 5V. ;-)
Does anyone knows if a have a 3V RS-485 driver like (MAX3485) is communicating with a RS-485 in 5V. ;-)
Jul 15, 2011 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,961 Helped 14,780 Reputation 29,845 Reaction score 14,249 Trophy points 1,393 Location Bochum, Germany Activity points 300,439 Definition of the RS-485 standard is independent of driver supply voltage. Both are fully interoperable.
Definition of the RS-485 standard is independent of driver supply voltage. Both are fully interoperable.
Jul 15, 2011 #3 X xxtigerxx Advanced Member level 1 Joined Jun 5, 2001 Messages 441 Helped 38 Reputation 76 Reaction score 32 Trophy points 1,308 Location Greece Activity points 2,890 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?
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?
Jul 15, 2011 #4 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,961 Helped 14,780 Reputation 29,845 Reaction score 14,249 Trophy points 1,393 Location Bochum, Germany Activity points 300,439 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.
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.