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+--- Thread: RS 485 termination? (/showthread.php?tid=523)
RS 485 termination? - Thomas - 22.12.2016
Hi
What is the internal circuit of RS485 in LM4 like? Is the line terminated internally? Or it is in high-impedance state and the termination must be done by external resistor(s)?
In case the line is not internally terminated do you have a recommendation how to correctly terminate the line?
Are RS485 lines electrically isolated between each other and to other lines especially to KNX bus?
Thank you
RE: RS 485 termination? - admin - 22.12.2016
There's no internal termination. If you need it, then place 120ohm resistors on both line ends. KNX is completely isolated from other system components, RS-485 is not.