| 摘要 |
PURPOSE:To increase the reliability by duplicating a change-over device. CONSTITUTION:If the 1st computer system 1 is in failure, a failure detection change-over switfh 30 is changed over from a contact (a) to a contact (b), although a relay 40 is operated, if double-throw type change-over switches 50, 51, normally open contact 40a, and normally closed contact 40b, which are expected to interlock with the operation, are in failure or if the relay 40 is inoperative, a delay relay 41 is operated and a change-over switch 52 is changed over from the contact (b) to the contact (a). The output of the 1st computer system 1 is interrupted with a change- over switch 52 and the output of the 2nd computer system 2 is transmitted from a terminal (c) through the contact (b) of the double-throw type change-over switch 50 and the contact (a) of the chang-over switch 52. |
