2. Completion of the lines

Different types of termination RS-485 lines influence the quality of the signal reaching the final RS-485 receiver. Depending on the speed of transmission, the working distance between the transmitter and receiver driver, the working environment (external disturbances and noise) can choose one or another type of termination. For the most favorable one unterminated line provides a low power consumption, otherwise, must choose a type of finish that will suit the characteristics of the line to provide reliable communication.

2.1. Unterminated configuration

RS-485 line without termination.

Unterminated line

Unterminated waveforms

2.2. Termination with series resistor

RS-485 line with series resistors.

Termination with series resistor

Series resistance waveform

2.3. Termination resistor in parallel with

RS-485 line resistors in parallel.

Termination resistance in parallel with

Termination in parallel forms of wave

2.4. AC Termination

RS-485 line resistors, capacitor, AC termination.

Termination in AC

2.5. Termination power

RS-485 line with termiación powered by resistances.

Termination of power

2.6. Completion failsafe Failsafe

RS-485 line termination resistors with power on failsafe settings.

Fail safe Failsafe termination

2.7. Bidirectional Termination

RS-485 line with bidirectional parallel resistance.

Bi-directional termination

2.8. Comparison of termination

Terminators