The GW Instek PLR 20-18 Programmable Single Output DC Power Supply, 20V/18A, 360W is a hybrid circuit design which incorporates front stage switching and rear stage linear architectures. The unique advantages of this design benefit from the combination of both switching and linear structures. The front stage switching structure can effectively reduce size and weight, and the rear stage linear structure can maintain lower ripple voltage, lower ripple current, and faster transient response. The PLR-20-18 features many functions, including three sets of user-defined Preset function; programmable automatic Output off timer function; programmable Sequence function; CV, CC priority activation functions (prevent overshoot and inrush current while output is turned on); External voltage and current output control and OVP, OCP and UVP functions. The above functions are built-in. Users do not have to pay for any extra costs. The PLR2018 is equipped with RS-232 interface and also provides optional GPIB & USB (PLR-GU) and USB & LAN (PLR-LU). The program control of maximum 32 units can be realized by Local Bus no matter which interface is utilized. The PLR 20-18 genuinely meets users' requirements of the new generation DC power supplies.