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

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

High voltage power supplies use linear technology to provide one or more DC outputs at voltage levels of hundreds or thousands of volts

Remote terminal units (RTUs) connect directly to sensors, meters, dataloggers or process plants, and collect and transmit data automatically

Power distribution units (PDUs) have an electrical input and several outputs, often as electrical outlets, for powering multiple devices. 

Alternative power generators produce electricity from renewable energy sources, such as wind, flowing water, solar energy and biomass, which create less environmental damage and pollution than fossil fuels

PV and solar power systems convert light into electricity. They are the building blocks of photovoltaic (PV) modules

Computer power supplies convert alternating current (AC) line to direct current (DC) line, needed by the computer

Power switches are used to apply power to or remove power from instruments such as large-scale factory equipment

DC power systems provide continuous DC power through multiple outputs.  Most DC power systems include a battery backup, temperature compensation, and other features

Three phase uninterruptible power supplies (UPS) are devices that operate in conjunction with existing electrical systems to provide power conditioning, back-up protection and distribution for electronic equipment loads

Power strips are used in applications where multiple AC outlets are needed, often without surge or line noise protection

Electrical power generators transform mechanical energy into electrical energy, typically for backup or emergency power. Generators can produce either AC or DC power and are typically powered by a fuel engine

Medical power supplies produce conditioned outputs for medical devices, instruments, and equipment

AC power sources provide alternating power and typically have adjustable output values for the testing of component response at various voltage, current and frequency levels