Why Choose the Finder 11.31.8.230.0000 Light-Dependent Relay?
The Finder 11.31.8.230.0000 is a compact and reliable modular light-dependent relay designed to switch lighting automatically according to ambient light levels. Part of the Finder 11 Series, this twilight switch is suitable for energy-efficient lighting control in commercial, industrial and building-services applications.
The relay works with an external photosensor to monitor ambient illumination and operate connected lamps when the selected light threshold is reached. Its adjustable sensitivity range of 1–100 lx allows the switching point to be configured for different environments, helping ensure lighting operates only when required.
Designed for a nominal 110–230 V AC supply, the Finder 11.31.8.230.0000 provides a single normally open 16 A contact. Its slim, single-module enclosure measures only 17.5 mm wide and mounts directly onto a 35 mm DIN rail inside a protected electrical panel.
Key Advantages
- Automatic lighting control according to ambient illumination.
- Adjustable 1–100 lx switching threshold.
- 110–230 V AC supply range for mains-powered installations.
- Single normally open contact rated at 16 A.
- Timed switching helps prevent nuisance operation caused by temporary light changes.
- Slim 17.5 mm DIN rail-mounted enclosure saves panel space.
Key Features
- Finder 11 Series modular light-dependent relay.
- 110–230 V AC nominal supply voltage.
- 1 normally open contact rated at 16 A and 250 V AC.
- Adjustable light threshold from 1 to 100 lx.
- 15 s switch-on delay.
- 30 s switch-off delay.
- Low standby power consumption.
- External photosensor connection with a maximum cable distance of 50 m.
- 35 mm DIN rail mounting for modular electrical panels.
Reliable Automatic Lighting Control
Light-dependent relays monitor ambient illumination through a remotely positioned photosensor and automatically control connected lighting when the measured level reaches a selected threshold. This provides lighting according to actual environmental conditions and can reduce unnecessary energy use compared with manually controlled installations.
The Finder 11.31 incorporates separate switch-on and switch-off delays to prevent brief changes in illumination from causing unwanted operation. This helps avoid switching triggered by vehicle headlights, lightning, temporary shadows or other short-duration changes in ambient light.
Typical Applications
- Street, pathway and access-road lighting.
- Commercial exterior and security lighting.
- Industrial yards, loading bays and storage areas.
- Car parks and perimeter lighting systems.
- Shop-window and illuminated-sign control.
- Garden and landscape lighting.
- Building automation and energy-saving lighting installations.
