Abstract: The invention relates to an electrical connection device (2) for electrically connecting a first pad (10) and a second pad (12) of an electrical power source (4) and electrical contacts (18, 19) of heating modules (6, 7), the first pad (10) having a first electrical potential that differs from that of the second pad (12), said connection device (2) comprising: —at least one first electrically conductive tongue (32), intended to be electrically connected to the first pad (10) and to at least one electrical contact (19) of at least one heating module (6, 7); —at least two second electrically conductive tongues (41), intended to be electrically connected to the second pad (12), and to other electrical contacts (18) of at least one heating module (6, 7), characterized in that the connection device (2) is electrically capable of electrically connecting the first pad (10) and the second pad (12) and the electrical contacts (18, 19) of a single heating module (6, 7) and that the connection device (2) is also capable

Abstract: The invention relates to an air pulser (1) for a motor vehicle, designed to be powered by a first voltage (U1) and a second voltage (U2), according to which the air pulser (1) comprises: a first interface (I48) for connecting to a power supply network (G48) supplying the second voltage (U2); a second interface (ILW) for connecting to a communication bus (BLW); a functional module (11) connected to the first connection interface (I48); a main switch (Q2) connected to the functional module (11), designed to enable signals (DAT) to travel through the communication bus (BLW); and a first protection module (10) for isolating the communication bus (BLW) from the power supply network (G48) when there is an overvoltage (USS) between the functional module (11) and the second connection interface (ILW).