The present disclosure relates to a simulator for performing a distributed simulation. The simulator comprises a simulation controller and a plurality of configurable modular cards. The simulation controller determines configuration and reconfiguration parameters of the cards, and exchanges configuration and reconfiguration messages with the cards. Each card comprises a configurable input/output unit comprising a plurality of configurable inputs and outputs, and a power supply comprising a plurality of configurable power supply circuits. The input/output unit exchanges configuration and reconfiguration messages with the simulation controller. Each card comprises a processor for configuring the plurality of inputs and outputs of the configurable input/output unit and the plurality of power circuits of the power supply, for reconfiguring the plurality of inputs and outputs of the configurable input/output unit and the plurality of power circuits of the power supply, and for executing a simulation code to implement a functionality of the simulator.