A printer is an output device that can output image data of a computer to physical form. There are many types of printers, and the common classification method is based on the final imaging principle and technology, which can be divided into needle printers, inkjet printers, and laser printers, Thermal conversion printer. In these printers, there are hitting and non-impacting types; there are dot matrix prints and page prints; there are toner prints, ink prints, and even wax prints. They not only differ in printing principles but also differ in physical structure. As far as printing technology is concerned, they are completely different. Of course, their application areas are also different.
A scanner is an electronic device which can capture images from physical items and convert them into digital formats, which in turn can be stored in a computer/Storage and viewed or modified using software applications. Different types of scanners are available with different resolutions. In the world of electronic data transmission, scanning is considered to be the most cost-effective and reliable way of transmitting images.
Power Back Up:
An uninterruptible power supply (UPS) or uninterruptible power source (UPS) is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries, supercapacitors, or flywheels. The on-battery run-time of most uninterruptible power sources is relatively short (only a few minutes) but sufficient to start a standby power source or properly shut down the protected equipment. It is a type of continual power system.
A UPS is typically used to protect hardware such as computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption or data loss. UPS units range in size from units designed to protect a single computer without a video monitor to large units powering entire data centers or buildings. The world’s largest UPS, the 46-megawatt Battery Electric Storage System (BESS), in Fairbanks, Alaska, powers the entire city and nearby rural communities during outages.
A programmable logic controller (PLC) or programmable controller is an industrial digital computer which has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, or robotic devices, or any activity that requires high-reliability control and ease of programming and process fault diagnosis.
PLCs were first developed in the automobile manufacturing industry to provide flexible, ruggedized and easily programmable controllers to replace hard-wired relays, timers, and sequencers. Since then, they have been widely adopted as high-reliability automation controllers suitable for harsh environments. A PLC is an example of a “hard” real-time system since output results must be produced in response to input conditions within a limited time, otherwise, the unintended operation will result.
PLC & Automation