公开(公告)号：CA1225732A

公开(公告)日：1987-08-18

申请号：CA474270

申请日：1985-02-14

Applicant: ELECTRONICS CORP AMERICA

Inventor： BALA JOHN L ,  MCCARRON MICHAEL ,  ZAPOLIN RICHARD E

IPC: G06F11/00 ,  G05B9/02

Abstract: A fail-safe device for removing power from controlled circuitry upon the occurence of an undesired operating condition is disclosed. The fail-safe device includes means for detecting a short circuit in the controlled circuitry and for indicating the existence of an undesired operating condition if a short is detected. The fail-safe device further includes a non-volatile memory for retaining data through a power outage so that the existence of an undesired operating condition is remembered upon return of the power. The data stored in the non-volatile memory may also be useful in investigating an accident or malfunction. The fail-safe device still further includes a reset button which returns power after an undesired operating condition if it is momentarily depressed.