The powerful750 W att laboratory power supply unit with only 1U which can be stacked on top of one another directly, so needs no air slit either above or below and can actually get by on 1 HU. Output voltages0 - 30 V DC and output currents0 - 25 A can be set directly on the device or remotely via the built-in RS232/RS485 interface. All important functions can also be programmed via analogue inputs (control voltage 0 5V, 0-10V, control current 4-20 mA or via external resistor; relevant drivers are available for the digital control e.g., via LabView and LabWindows). High-resolution 16-bit A/D and D/A converters enable very precise settings and programming; the dial controls on the device can be switched between coarse and fine adjustment. A double digital display displays the current values as well as various status information (including the Over Voltage Protection, Under Voltage Limit, overload mode, address settings), and a monitor output provides corresponding analogue voltages (0-5V or 0-10V) for external monitoring. The device can naturally be operated as a constant voltage as well as a constant current source and can, if necessary, automatically switch between these operating modes. Several devices can be switched serially or in parallel. This GEN/H model is half the structural shape of 19" racks.