INSPECTION SYSTEM OF MICROCOMPUTER BOARD FOR UNINTERRUPTED POWER SUPPLY APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a system which can test easily an operation of a microcomputer board for an uninterrupted power supply apparatus. SOLUTION: A predetermined pulse signal is inputted to a detection port 25 of a microcomputer board 8 to decide whether an uninterrupted power supply apparatus is in an operation mode or in an inspection mode. After a PWM control signal is converted into a DC voltage by a switching device 35 and an LC filter 32, the converted DC voltage is inputted to an AD converter 20b to decide whether the PWM control output and the AD converter 20b are normal or not. Further, pulse signals from output ports 21a-21c are inputted to input ports 22a-22c through a loop back circuit 31 to decide whether the output ports 21a-21c and the input ports 22a-22c are normal or not.