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Computers are programmable electronic devices that accept data, execute prerecorded instructions, perform mathematical and logical operations, and output results.
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Data acquisition is the digitizing and processing of multiple sensor or signal inputs for the purpose of monitoring, analyzing and/or controlling systems and processes. Signal conditioning includes the amplification, filtering, converting, and other processes required to make sensor output suitable for rereading by computer boards.
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Data acquisition I/O modules or cards have both input and output functionality. Digital or discrete I/O modules include on-off signals used in communication, user interface, or control.
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Data loggers and data recorders acquire digital data from sensors and other signals. They are primarily used to store data for subsequent downloads to a host PC, but may also include real-time features such as monitors and alarms.
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DC power supplies accept an input power and output the desired form of DC power. Common types of DC power supplies include linear power supplies, switching power supplies, DC-DC converters, and silicon controlled rectifier (SCR) type power supplies.
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Distributed and supervisory control systems (DCS / SCADA) are system architectures for process control applications.
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Human machine interfaces (HMI) are operator interface terminals with which users interact in order to control other devices.
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Industrial computers are similar to personal computers (PC), but they are intended for use on a factory floor or in other harsh environments.
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Industrial enclosures are used to house electronic components, equipment and devices. They are designed to protect personnel from accidental injury and to prevent the ingress of environmental contaminants.
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Operator interface enclosures are used to house industrial controls such as display screens, pushbuttons, keyboards, lights, and other operator control devices. They are usually mounted on suspension/pendant systems or pedestals.
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Power supplies are devices that produce AC or DC power. This grouping includes current sources, DC power supplies, AC-DC adapters, DC-DC converters, AC power sources, and DC-AC inverters.
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Programmable logic controllers (PLCs) are the control hubs for a wide variety of automated systems and processes. They use a wide variety of inputs and outputs and provide network capability.
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Absolute rotary encoders use optical, mechanical, or magnetic indexing for angular measurement. They do not lose their position after power-down, but instead provide absolute position upon power-up without requiring a home cycle or any shaft rotation.
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Incremental rotary encoders are multi-turn sensors that use optical, mechanical, or magnetic index-counting for angular measurement. They contain no absolute reference, but instead count relative to the turn-on position.
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Serial communication products are used in industrial and commercial systems to transmit data bit-by-bit, or sequentially, over a single wire. They include serial servers, serial hubs, serial adapters, serial data converters, serial routers, and serial multiplexers.
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Serial data converters are used to interconnect two different serial standards, such as RS232 to RS422, USB to RS232, etc.
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Solid state relays or semiconductor relays (also called SSRs) can be used in place of mechanical relays to switch electricity to a load in many applications.
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Wireless modems transmit modulated data using electromagnetic waves.
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