Input And Output Electrical Devices

A computer program processes and digitises the input information.

Input and output electrical devices. An input device sends information to a computer system for processing and an output device reproduces or displays the results of that processing. An input device responds to changes in the environment and produces a suitable electrical signal for processing in an electronic circuit. Thus far we have seen a selection of input devices that can be used to detect or sense a variety of physical variables and signals and are therefore called sensors. Analog devices detect a value within a range.

Contactors motor starters valves and other output devices are used to turn on off motors lights heating elements and other equipment that affects the system in some way. A bar code reader will. But there are also a variety of electrical and electronic devices which are classed as output devices used to con. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device.

Discrete or digital input devices simply provide on off information. In all input devices other forms of energy are. Input output devices the digital input module dim interfaces with up to four standard utility electric gas or water meters or monitors eight digital inputs. There are two broad categories of input devices.

Data presented to an input device has to be in the right form for the device e g. The computer sits between the input and output devices. The result is then sent to an output device such as a screen.