# What is discrete and analog?

## What is discrete and analog?

The term “analog” refers to the fact that it is “analogous” of the signal it represents. When analog signals are brought into a computer, they must be made discrete (finite and countable). • A discrete-time signal is a finite sequence of numbers, with finite possible values for each number.

Is discrete the same as analog?

Discrete/digital I/O is either on or off (think light switch on or off). Analog I/O can be on or off or in between (think light switch dimmer). The inputs tell the PLC what to do with the outputs (depending on how you’ve programmed the logic).

### Is a discrete signal analog or digital?

A discrete time signal is not a digital signal; a discrete time signal is one in which the amplitude is a continuum, and not discretized. On the other hand, if the time is discretized, this signal is still analog. Only when a discrete time signal is passed through an A to D converter, it becomes a digital signal.

Does analog use discrete or continuous data?

Any analog signal is continuous by nature. Discrete-time signals, used in digital signal processing, can be obtained by sampling and quantization of continuous signals.

#### What is discrete wiring?

A discrete wire—also known as a lead or hookup wire—is a single cable or wire conductor that terminates at one connector contact. Multiconductor wire is an umbrella term for wires that feature multiple conductors and strands.

What is discrete input?

A digital signal that senses or sends either ON or OFF signals. For example, a discrete input would sense the position of a switch; a discrete output would turn on a pump or light.

## What is analog PLC?

An analog signal is one whose value continually varies over time. They are best represented as a continuous signal like a sine wave. Each point on the wave has a precisely defined value. For example, analog inputs for PLCs can include signals from pressure transducers and temperature from thermocouples.

What is another name for a discrete I O module?

Sometimes discrete I/O is referred to as digital I/O. The concept is simple, discrete I/O are signals that are either on or off. Some examples of discrete input devices would be things like light switches, push-buttons and proximity switches.

### How can you tell if a sensor is digital or analog?

Looking at a graph of a signal is usually the easiest way to identify if it’s analog or digital; a time-versus-voltage graph of an analog signal should be smooth and continuous.

What are examples of analog?

Examples of analog technology:

• photocopiers.
• old land-line telephones.
• audio tapes.
• old televisions (intensity and color information per scan line)
• VCRs (same as TV)

#### What is discrete input and output?

What is the difference between discrete and analog?

The difference between Analog and Discrete. When used as adjectives, analog means in which the value of a data item (such as time) is represented by a continuous (ly) variable physical quantity that can be measured (such as the shadow of a sundial), whereas discrete means separate. Analog is also noun with the meaning: something that bears an analogy to something else.

## What is difference between discrete and digital?

Discrete signal is digital signal, this is not always true. digital & discrete signal discrete signal is discrete in time but continuous is amplitidute, sampled speech signal is discrete signal. whereas output of any digital circuit is digital having either 0 or 5 V and also discrete in time.

Why is digital signal better than analog?

Digital signal are continuous signals This type of electronic l signals can be processed and transmitted better compared to analog signal. Digital signals are versatile, so it is widely used. The accuracy of the digital signal is better than that of the analog signal.

### What are discrete and analog signals?

An analog signal is a continuous wave that changes over a time period. A digital signal is a discrete wave that carries information in binary form. An analog signal is represented by a sine wave. A digital signal is represented by square waves. An analog signal is described by the amplitude, period or frequency, and phase.