Title:
CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JP3662431
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a control circuit capable of reducing a volume dedicated to parts.
SOLUTION: This control circuit is provided with a drive signal output unit 5b for outputting at least one command signal for controlling the drive of equipment 8a, 8b to be controlled, first relay circuits 1b-1e, 2b-2e to be operated by the command signal, operation detecting circuits 3b-3e, 6b for detecting the operation of the first relay circuits, a checking circuit 7 for checking the content of the operation detected by the detecting circuits and the content of the command signal output from a driving signal output unit 5a, second relay circuits 1a, 2a to be operated, when both the content agree with each other for a prescribed time, and a first normally open contact 10 to be turned on so as to stop the equipment 8a, 8b to be controlled, when a failure is generated. A second normally open contact 4a1 of the second relay circuit, a third normally open contact 4c of the first relay circuit and a fourth normally open contact 4a2 of the second relay circuit are connected in series in this order, so as to give the drive signal to the equipment 8a, 8b to be controlled, and the first normally open contact 10 is connected in parallel with this contact circuits connected in series.
Inventors:
Junichi Kimura
Application Number:
JP32820098A
Publication Date:
June 22, 2005
Filing Date:
November 18, 1998
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02H11/00; H01H47/00; H01H47/32; (IPC1-7): H01H47/32
Domestic Patent References:
| JP50110559A |
Attorney, Agent or Firm:
Nobuo Kono