Push-button set for nurse call systems, comprising a call button and a plug connector, wherein, - the plug connector comprises a plug connected to the call button via a cable and a socket that fits the plug, - the plug comprises an electrically insulating plug housing and the socket has an electrically insulating socket housing, and - the plug with a flat contact surface of the plug housing arranged on the front touches the socket on a flat contact surface of the socket housing also arranged on the front when plugged together, - the socket has several socket contact pins arranged at the position of the plug-in openings which, when plugged together, each contact a corresponding, coaxially aligned plug contact pin on the front side, forming an electrical connection, characterized in that - a plug ring magnet is attached to the side of the plug housing facing away from the contact surface and a socket ring magnet to the side of the socket housing facing away from the contact surface, wherein the two ring magnets (24, 34) comprise the same circular ring geometry and have matching ring magnet axes when plugged together and attract each other magnetically, - the plug has several plug contact pins protruding from the contact surface of the plug housing and surrounded by the plug ring magnet, which are arranged parallel to the ring magnet axis of the plug ring magnet in a row and in a dividing plane running radially to the ring magnet axis of the plug ring magnet, with the plug contact pins engaging in corresponding plug-in openings in the socket housing with a precise fit when plugged together, - the socket has two bar magnets which are arranged on both sides of the row of plug-in openings and protrude from the contact surface of the socket housing and which are attached magnetically at the front to the socket ring magnet, and which, when plugged together, engage in corresponding bar magnet recesses in the plug housing with an precise fit, the bar magnets touching the plug ring magnet on the face side, adhering magnetically. - the plug connector comprises a plug connected to the call button via a cable and a socket that fits the plug, - the plug comprises an electrically insulating plug housing and the socket has an electrically insulating socket housing, and - the plug with a flat contact surface of the plug housing arranged on the front touches the socket on a flat contact surface of the socket housing also arranged on the front when plugged together, - the socket has several socket contact pins arranged at the position of the plug-in openings which, when plugged together, each contact a corresponding, coaxially aligned plug contact pin on the front side, forming an electrical connection, - a plug ring magnet is attached to the side of the plug housing facing away from the contact surface and a socket ring magnet to the side of the socket housing facing away from the contact surface, wherein the two ring magnets (24, 34) comprise the same circular ring geometry and have matching ring magnet axes when plugged together and attract each other magnetically, - the plug has several plug contact pins protruding from the contact surface of the plug housing and surrounded by the plug ring magnet, which are arranged parallel to the ring magnet axis of the plug ring magnet in a row and in a dividing plane running radially to the ring magnet axis of the plug ring magnet, with the plug contact pins engaging in corresponding plug-in openings in the socket housing with a precise fit when plugged together, - the socket has two bar magnets which are arranged on both sides of the row of plug-in openings and protrude from the contact surface of the socket housing and which are attached magnetically at the front to the socket ring magnet, and which, when plugged together, engage in corresponding bar magnet recesses in the plug housing with an precise fit, the bar magnets touching the plug ring magnet on the face side, adhering magnetically.