This paper first talks about the division of the power secondary system security areas, the necessity and principles of physical isolation.Then,specific deployment and application of NARI SysKeeper-2000 forward and backward security isolation devices in power communication integrated network management system are introduced. In addition, the testing result of forward and backward data transmission is also given in the end of the paper.%介绍了电力二次系统安全区的划分，物理隔离的必要性及原理，以南瑞SysKeeper-2000正反向安全隔离装置为例，详细介绍了正反向隔离装置在电力通信综合网管系统中的具体部署和应用方案，并给出了正反向数据传输的测试情况。
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