In-swappable fan module and connection device in this

It is stated a swappable fan module to a connection device (40) via at least one connection (28) and a housing (20) has. The at least one terminal is electrically connected to the fan (30), so that when it is mounted in a system, an electrical connection is made between the fan and the system. The terminal device further has at least one LED that is electrically connected to the fan or the at least one terminal to display the operating state of the fan. At least one cover plate is on at least one edge of the housing to form the overall housing L- or U-shaped. The housing is sealed to a side surface of the fan installation housing when it is attached to the fan. The housing also has a recess for receiving those lines that connect the ports, the fan and the LED electrically.