Computer Interfacing
Discussions about interfacing and electronics

RS485 termination resistor

RS 485


       Computer Interfacing Forum Index -> RS422 and RS485
Author Message

Mar 09, 2011 10:19 am

There is one master and two slaves connected on RS485 two wire (MODBUS protocol). The length of the cables is hardly 6 inches. The System is picking up noise. Is it advisable to put terminating resistor for such short lengths. please give solution.

Mar 16, 2011 6:21 am

you try by increasing the length to min 1Mtr and Connect a pot(1k) as terminating resisitor.I think your problem is reflexions.So by adjusting the pot you can avoide that

       Computer Interfacing Forum Index -> RS422 and RS485
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