The BL67 modular concept is a very flexible approach to connectorized I/O. The system is made up of a gateway for network interface, electronic modules for I/O signals, and base modules for connectorization. The gateway provides communication between the fieldbus and the I/O modules. I/O modules are not dependent on the fieldbus protocol. The DIN-rail or frame mountable base modules are available with eurofast®, minifast® and picofast® connectors. The electronic modules are hot swappable. The system supports multiple networks and a wide variety of I/O signals in a rugged housing.