According to one aspect of the present disclosure, a system for controlling a locomotive may comprise a controller; an Ethernet switch; one or more Ethernet modules in communication with the controller through the Ethernet switch, wherein a given Ethernet module of the one or more Ethernet modules includes a microcontroller and one or more connectors, wherein the microcontroller provides one or more communication interfaces; one or more power supplies connected to the one or more Ethernet modules and providing power to the one or more Ethernet modules; and one or more locomotive units in communication with the one or more Ethernet modules, wherein the one or more locomotive units are installed on the locomotive and controlled by the controller.