Design and implementation of a high reliability digital output module

From the view of increasing the reliability of digital output module,some special and necessary countermeasures are put forward.The countermeasures include instant initialization just after power on,closedown output at the same time with power off,and online detecting digital output status.According to such methods,design and implementation of the module in the area stability control device are completed.These methods are simple and practical,and are applied into the second stage project of the area stability control system in the east part of Heilongjiang power system.