Instructions

18
Communication Line Termination Resistance
If, the communication distance of RS485 lines is longer than 10 meters and there are more than one
devices on the line, a 120 Ω line termination resistance should be installed between the A and B ends of
the farthest device of the communication terminal.
For this process, as it is seen from the following figure, it is enough to short-circuit the GND and TR
terminals of the device.