The Next Systems Domotime DC2SEM2L garage door control panel controls two traffic lights, each with a red and a green light. It alternates traffic through a shared lane or at an intersection, ensuring that both directions are never green at the same time. Operation is selected by timed intervals or sensor signals, with a period during which both traffic lights remain red.

The two SPDT relays control the traffic lights, while the two inputs accept NO or NC sensors. Three adjustable timers set the duration for which both red lights are on, the green-light activation time, and the priority hold time, from 5 to 120 s. The indicator LEDs show the status of the panel, relays, sensors, and traffic lights.

• Mains supply: 230 VAC, 50 Hz
• Accessory power supply: 24 VAC
• Fuses: 2 fast-blow fuses, 160 mA each
• Outputs: 2 SPDT relays, Form C, up to 2 A at 230 VAC
• Sensor inputs: 2, NO or NC type
• Programming: Using 2 DIP switches
• Adjustable timers: 3, with a range of 5–120 s
• Indicator LEDs: 7 in total, indicating panel operation, relay status, sensor signals, and traffic light colors