Discrete Output

A discrete output, abbreviated as DO, provides a discrete input to the PLC.  DO refers to a type of signal or data that can only take on a limited set of distinct values.  Similar to discrete inputs, discrete outputs are often binary, meaning they can have only two possible states: either a TRUE or FALSE, 1 or 0, or ON of OFF as an input signal.  Discrete outputs are commonly used in digital systems where information is processed and communicated in a digital format.

A discrete output may be used to activate an alarm, beacon, valve or interlock device.

The opposite of discrete outputs is continuous outputs, which can take on a range of values within a continuum.  Discrete outputs are essential in digital control systems and play a crucial role in the automation and control of various processes.