The utility model relates to
nuclear power technology field, concretely relates to a priority selection drive
machine cabinet for
nuclear power plant safety level
instrument control system, including the cabinet body, the cabinet body is equipped with
machine cabinet power supply device,
signal transmission device, equipment drive device and priority drive
machine case from top to bottom in proper order in it,
signal transmission device links with upstream
control system,
signal transmission device links with priority drive machine case, and priority drive machine case links with equipment drive device, priority drive machine case includes
terminal unit, IO card spare and priority control module, and priority drive machine case sets up a plurality of priority control modules according to the controlled equipment quantity, and priority control module is configured as receiving drive command and according to the priority height selection output drive command, the utility model replaces the complex circuit of
relay and other logic elements, can save a large number of spaces under the condition of realizing same selection drive logic, reduces the
system complexity, improves the reliability, reaches shorter
response time.