The PBM-02 bistable relay is used to control lighting or any other device by means of parallel connected single-pole pushbuttons. Successive pressing of any of the buttons causes switching on or off the devices connected to the output terminals. The control impulse can be a signal from the L or N line. The Set and Reset control inputs allow for central control of a group of relays. The use of the relay's internal memory allows you to remember its current state in the event of a power failure.