Radio control relay RS-P3, transmitter - three-button remote control

Electronic radio relays are used for remote control of gates, roller shutters, lighting, arming alarm systems, etc. The remote control system consists of a transmitter and a receiver (transmitter). There is a possibility of cooperation of many transmitters with one receiver and a single transmitter with many receivers.
The RS-P ... remote control works with dedicated F&F devices: the RS-407M monostable receiver and the RS-407B bistable receiver.
Action
The impulse caused by pressing a button on the remote control sends a coded signal to the receiver. The remote control has protection against breaking the transmission after releasing the button. Thanks to this, even the shortest activation of the function causes the transmission of the full data frame. Data transmission from