Simulation, modelling and visualization are typically a closed entity. As a result of this, the connection of further simulators as well as real hardware is very difficult. Therefore, the application of simulators is always reduced to well defined assignment. A co-simulation backplane to connect miscellaneous simulators, as developed in the research project X-in-the-Loop, is trying to close this break. Instead of developing an own new visualization tool, the XCP-protocol is used as a standard protocol to transfer visualization and also calibration data in real-time.