Install the photo-electric cell outdoors. It must be positioned away from the lights it controls to avoid "cycling" (turning off because it sees its own light). Wiring the Terminals: Terminals 1 & 2: Connect to the 230V AC power supply.
The Merlin Gerin Multi 9 IC 2000 P is a high-performance twilight switch designed to manage lighting circuits based on ambient light levels. While Merlin Gerin has since been integrated into the Schneider Electric brand, these robust units remain a staple in many industrial and commercial electrical panels. Merlin Gerin Multi 9 Ic 2000 P Manual
The IC 2000 P is an analog twilight switch that uses a remote photo-electric cell (sensor) to detect outdoor light intensity. Multi 9 Operating Voltage: 230V AC (+10% / -15%) at 50/60 Hz Breaking Capacity: 16A at 250V AC (cos phi = 1) Brightness Range: Adjustable from 2 to 2000 Lux Mounting: 35mm DIN rail Protection Rating: IP20 (Device), IP54 to IP65 (Sensor) Installation Guidelines Install the photo-electric cell outdoors