The sealed NEMA 4 rated unit is designed to operate without fans or special cooling up to and beyond 50 degrees C. Total power consumption is less than 4 Watts, greatly simplifying packaging. DC power at 24 volts was chosen as the nominal supply since it is quite readily available in a plant – manufacturing environment. Sixteen critical machines were selected from a Ford Engine Plant, and data was collected for over 6 million machining “hits” and analyzed against the original fault criterion for robustness and reliability.here
