| 摘要 |
<p>PURPOSE:To allow the structure of both one system and the other system to be able to be symmetrical by outputting the switching signal of the system according to the AND condition of a main machine signal of the one system, a defect signal and an auxiliary machine signal when the other system stands by. CONSTITUTION:If one-system arithmetic unit is normal when movable contactors of a main machine selection switch 7 respectively make contact with switching contacts 1, 2, a signal is outputted from one-system defect detector 2 to drive a defect detection relay FR1, thereby driving a system switching relay FAR1, which outputs a signal for the one system. When a malfunction occurs in the arithmetic unit in the state, the relay FR1 is deenergized to deenergize the relay FAR1. Simultaneously, a system switching relay FAR2 is driven to allow the two-system defect detector to output. In this manner, the structures of the both systems can be symmetrical, thereby providing interchangeability.</p> |
