Electric air heater unit

Based on the proven technology of Eberspächer catem's standard PTC air heater elements, these powerful electronic heater elements feature integrated processor control electronics for optimal, stepless regulation and adjustment to the heating performance in every vehicle operating state. An electronic output controller is integrated directly in the PTC air heater for this purpose. Power semiconductors switch the individual heating circuits off and on, and special protection and diagnostic functions are installed in the electronics module. Data exchange or the actuation of heating elements via the vehicle runs via a databus, e.g. LIN or CAN, or directly via a PWM interface, depending on the customer. The microprocessor-controlled power electronics permit comprehensive diagnostics to be performed on the PTC air heater and its heating circuits. Every circuit can be monitored individually and switched off, if required. Furthermore, the system monitors the power/current consumption of the air heater. All of this information can be made available to the vehicle electrical system via the interface for comprehensive energy management. PTC heater elements with integrated control electronics significantly reduce cabling inside the vehicle and thus help to save on installation space and costs.