The devices accept a broad range of supply voltages from 9-32 Vdc and provide reverse polarity protection. Using high-frequency switching output, they feature factor-set maximum current output of 1.28 A, identical fixed ramp time of 3.5 sec, diagnostic LEDs, and IP67 protection class. Units are encapsulated in a metal box with watertight six-pin connectors for the mobile environment and operate at temperatures from -40° to +85°C.