PW1000 and DM1022 are digtal/analog input/output module for general application with 4 analog output connectors, and can be used for monitoring or management system for various area such as building or factory. The system is composed of a layered structure, which can practice point-to-point communication, and the module design has a large number of expandable interfaces, digital input and output modes, and supports multiple protocol standards, making the system expandable and open.