The RTD Scanner monitors up to 8 channels of several types of RTDs. The temperature information is provided to an engine control system over a SAE J1939 or CANopen bus. Temperature information can include exhaust temperature, winding temperature, and fluid temperature monitoring. All 8 channels of temperature data are automatically sent over the CAN bus when power is applied with no additional programming or configuration required. Integral diagnostics determine RTD integrity and the RTD inputs are isolated from each other. The RTD temperature monitoring control features rugged packaging and watertight TE Deutsch connectors. Applications include power generator sets.