Hi,
I'm looking for some sort of component or "method" for measuring to see if there is termination in place on an RS-485 (DMX) line. It needs to be placed at the same end of the circuit as the line driver, and ideally not present any load or other problems on the line. Some sort of logic output to a microcontroller to basically detect if the 120hm: termination resistor is present across the lines at the other end is what I'm after. How could this be done?
Cheers
I'm looking for some sort of component or "method" for measuring to see if there is termination in place on an RS-485 (DMX) line. It needs to be placed at the same end of the circuit as the line driver, and ideally not present any load or other problems on the line. Some sort of logic output to a microcontroller to basically detect if the 120hm: termination resistor is present across the lines at the other end is what I'm after. How could this be done?
Cheers