Sulfur dioxide (SO2) is irritating to eyes, skin and respiratory system. Volcanic Smog (vog) is produced from SO2 gas and is a hazard in Hawaii. Scientists monitor SO2 emission rates at KÄ«lauea volcano. Gas Plume during the 1984 eruption of Mauna Loa, Hawaii blocks out the sun.
Control Unit (CU) A control unit (CU) handles all processor control signals. It directs all input and output flow, fetches code for instructions from microprograms and directs other units and models by providing control and timing signals.
A floor-mounted PDU, sometimes called a main distribution unit (MDU), provides an important management bridge between a building's primary power and various equipment racks within a data center or network operations center (NOC). rack-mountable PDU mounts directly to an equipment rack so it can control and monitor power to specific servers, switches and other data center devices and assist in balancing power loads.