| 摘要 |
PROBLEM TO BE SOLVED: To enhance usage efficiency of the A/D input terminal equipped with an A/D converting function, provided in a microcomputer to a current monitor terminal. SOLUTION: Resistors Rs1, Rs2, Rs3, and Rs4 for current detection are connected to the drain sides of semiconductor relays 2, 10, 16, and 22. A plurality of loads 3, 11, 17, and 23 are provided, respectively, with load current monitor circuits 6, 13, 19, and 25 for monitoring the values of the currents flowing to the loads 3, 11, 17, and 23. The analog output values of the load current monitor circuits 6, 13, 19, and 25, in the plural loads 3, 11, 17, and 23 optionally selected through analog multiplexers 28 are fetched in CPU through an A/D converter built in a microcomputer 8.
|
