The digital input and output module from the System pro M compact® InSite series is used to receive data from wired connected devices (accessories, meters) and the control of connected accessories. It can read the contact status, activate or deactivate consumers and record consumption values. It is compatible with water, gas and heat meters with pulse output. The connection to the InSite bus is made using a ribbon cable. The ID address can be assigned using a button, and the correctness of the installation and functionality is indicated by an optical display. In addition, no external power supply is required.