公开(公告)号：US20150177706A1

公开(公告)日：2015-06-25

申请号：US14137134

申请日：2013-12-20

Applicant: Thales Canada Inc

Inventor： Abe KANNER ,  David DOYLE

IPC: G05B9/03

CPC classification number: G05B9/03 ,  G06F11/2005

Abstract: A system, method, and safety unit provide safety assurance for a multiple redundant system controlling a plant or complex. A unit active line (UAL) status indicates the presence of at least one redundant active unit within the system. A safety verification line (SVL) status verifies the powered down status of all redundant units not active within the system. A safety unit is associated with a vital supervision card (VSC) and vital power bus and the safety unit controls switchable connections from the vital power bus to the UAL and the SVL. Based on verification of UAL and SVL status, system control includes energizing the UAL.

Abstract translation: 系统，方法和安全单元为控制工厂或复合体的多重冗余系统提供安全保障。 单位有效线（UAL）状态指示系统内存在至少一个冗余有源单元。 安全验证线（SVL）状态验证系统内未激活的所有冗余单元的掉电状态。 安全单元与重要的监控卡（VSC）和重要的电源总线相关联，安全单元控制从重要电源总线到UAL和SVL的可切换连接。 基于UAL和SVL状态的验证，系统控制包括激活UAL。