Electrical rail mount device and cover for an electrical ratl mount device

An electrical rail mount device for mounting on a rail, comprising:

• at least one input terminal configured to receive an input line;
• fixing means configured to fix the input line to the at least one input terminal to establish an electrical connection;
• a lockable cover reversibly movable from an open state into a closed state, whereas the cover is configured to cover the fixing means in the closed state, such that the fixing means can only be accessed by moving the cover from the closed state into the open state;
• and
• an electrical element arranged in the cover and configured to provide an electrical function to an active electronic element of the electrical rail mount device, wherein an electrical connection is provided between the electrical element and the active electronic element,
• wherein the electrical rail mount device comprises an electricity meter for measuring power consumption, and wherein the at least one input terminal is provided as a power terminal configured to receive a power line as the input line, and the fixing means is configured to fix the power line to the power terminal to establish an electrical connection, and
• wherein the electrical element is provided as an auxiliary port configured to receive an auxiliary line, whereas the auxiliary port is configured to allow a communication of an external source with a smart meter gateway comprised by the electricity meter via the auxiliary line, the cover further comprising auxiliary fixing means for fixing the auxiliary line to the auxiliary port positioned such that they are accessible in the closed state of the cover, wherein the cover has a box shape, wherein the auxiliary port is arranged inside a volume defined by the box shaped cover.