CAN and Serial Communication instruments from Curtis display vehicle data and fault information. These gauges connect directly to Curtis controllers and I/O modules, easily, seamlessly and conveniently. The communication protocol enables lower vehicle cost by minimizing wiring between system components. Additional I/O in the gauges allow system inputs (switches, sensors, throttles, etc.) near the operator to be transmitted to the controller via the communication link in the gauge. Curtis gauges and instruments can be used to program or configure vehicle settings. Curtis instrumentation is designed to be easy to read, with large displays, and sealed to meet the toughest environmental conditions.