Professional electrical wiring diagram, clean technical schematic style, white background. Show a Shelly 1 Gen4 smart relay module with terminals labeled L, N, I, O. Left side: 230V power outlet with brown wire (L) connected to Shelly terminal L, blue wire (N) connected to Shelly terminal N. Right side: NovoPort 2 garage door motor control unit with two terminals (3 and 4). White wire from Shelly terminal I to NovoPort terminal 3. White wire with black stripe from Shelly terminal O to NovoPort terminal 4. Add text labels: "230V STECKDOSE", "Shelly 1 Gen4", "NOVOPORT 2", "Braun (L)", "Blau (N)", "Weiß (I)", "Weiß/Schwarz (O)". Include warning symbol with text: "⚠️ I/O = potential-free, NO 230V!". Technical drawing style, clear lines, professional, high contrast, black text on white. Voir plus