6ES5312-3AB11接口模块IM312EXTENSIONUNIT接口模块用于CENTRALIZEDCONNECTIONOFEUWITHCCOREU,EUWITH电源模块，COMPACTVERSION,EU6ES5312-3AB11接口模块IM312EXTENSIONUNIT接口模块用于CENTRALIZEDCONNECTIONOFEUWITHCCOREU,EUWITH电源模块，COMPACTVERSION,EU6ES5312-3AB11接口模块IM312EXTENSIONUNIT接口模块用于CENTRALIZEDCONNECTIONOFEUWITHCCOREU,EUWITH电源模块，COMPACTVERSION,EU6ES5312-3AB11接口模块IM312EXTENSIONUNIT接口模块用于CENTRALIZEDCONNECTIONOFEUWITHCCOREU,EUWITH电源模块，COMPACTVERSION,EU)