An example control module for a three-dimensional (3D) printing system is described having multiple input interfaces, multiple output interfaces and a power supply interface. The power supply interface provides power to at least one of the control module and any devices connected to the control module via the output interfaces. The control module is configured to receive instructions from a central control unit via at least one of the input interfaces and command a range of electromechanical devices via at least one of the output interfaces.