通过对计算机的USB口或RJ45网口加装相应的多串口卡转换器等方式，扩展不少于16个 RS232或RS485串口，模拟现场数量众多的动力设备，实现动力设备与被测试SU通信协议的交互，作为SU测试时的动力设备数据源。
1）　　扩展仿真为RS485接口时，该RS485接口应能实现不少于3个地址的串行总线仿真；
2）　　模拟动力设备数量最多为16个RS485串行总线、48个RS485接口的设备；
3）　　仿真软件内置协议数量应不少于200个动力设备；(Through to the computer USB port or RJ45 port with the corresponding serial card converter, expansion of not less than 16 RS232 or RS485 serial port, a large number of power equipment simulation field, realize the power equipment of the communication protocol of SU and tested interaction, as the data source of power equipment SU when testing.
1) when the extended simulation is the RS485 interface, the RS485 interface should be able to implement the serial bus simulation with no less than 3 addresses.
2) the number of analog power equipment is 16 RS485 serial bus and 48 RS485 interface devices.
3) the number of built-in protocols in the simulation software should not be less than 200 power devices;)