Connection module for bus connection, supply voltage and adjustable bus termination. The connection module was developed as a wiring aid for feeding the supply voltage and a two-wire bus to the LON bus modules. The supply voltage and the two-wire bus can be fed to the top of the device via a robust connection terminal with a max. 2.5 mm² connection cross-section and connected to the modules via the bridge plug. With a suitable interface cable, the two-wire bus can be connected to a PC via the two RJ45 sockets. A bus termination resistance of 52.3 ohms (R/2) for free network topology and 105 ohms (R) for line topology can be set using a jumper under the removable cover. Suitable for decentralized installation on TH35 mounting rail according to IEC 60715 in electrical distribution boards. Connection with screw terminals