Unlike sensor subsystem whose nuisance trip can he detected and bypassed by logical solver, the spurious failure of final element may leads directly to the nuisance trip of overall system.

• 联锁系统中，传感器子系统发生故障时不会立即导致联锁系统的拒动或误动作，而与此不同的是，最终执行机构发生的拒动或误跳车通常会直接导致整个联锁系统的误跳车。