Modules of lighted pushbuttons PH-xx are meant for use in steering, signalling and protection circuits. They represent supplementary equipment to the family of relays enabling construction of steering switches mounted on the level of relays, using same type of housing and sockets. The PS-xx has a cam switch type 4G10 produced by “Apator” with a chosen diagram of connections. It is possible to use a switch with maximally 5 packages and maximally 14 terminals. Those combinations enable multiple steering solutions in the external circuits.