Why Choose the ABB TL1 Twilight Switch?
The ABB TL1 is a compact single-channel modular twilight switch designed to switch lighting automatically according to the measured ambient light level. As part of the ABB TL Line twilight switch range, it provides dependable dusk-to-dawn control for exterior and building lighting applications while occupying only one module on a DIN rail.
The TL1 operates in conjunction with an external TLs light sensor, which is supplied with the switch and detects whether ambient light is above or below the selected threshold. Its adjustable 2–200 lx brightness range enables the switching point to be matched to the application, while the unit is factory preset to approximately 10 lx for convenient commissioning.
A built-in switching delay helps prevent unnecessary operation when light intensity changes briefly because of vehicle headlights, lightning or other temporary conditions. Two LED indicators provide clear visual information for the setpoint and relay contact status, making the ABB TL1 a practical solution for automatic lighting control in gardens, entrances, car parks, courtyards and other exterior areas.
Key Advantages
- Automatic ambient-light-controlled switching for lighting circuits.
- Wide 2–200 lx adjustable brightness range.
- Factory preset to approximately 10 lx for convenient commissioning.
- External TLs light sensor supplied with the twilight switch.
- Switching delay helps prevent unnecessary operation caused by temporary light changes.
- Two LED indicators show the selected threshold and contact status.
- Space-saving 1-module DIN-rail design for distribution boards and control panels.
Key Features
- ABB TL Line modular twilight switch.
- Single-channel lighting control.
- 2–200 lx adjustable switching threshold.
- Factory preset brightness threshold of approximately 10 lx.
- Supplied with separate ABB TLs external sensor.
- Integrated switching delay for stable operation.
- Two LED indicators for threshold and contact status.
- Front-accessible brightness adjustment.
- DIN-rail mounting for modular electrical installations.
- Compact 17.5 mm / 1-module width.
Reliable Automatic Twilight Control
The ABB TL1 automatically operates connected lighting according to the ambient brightness detected by its external sensor. When daylight moves above or below the selected threshold, the switch controls the lighting circuit accordingly, providing automatic dusk-to-dawn operation without requiring daily manual switching.
The integrated switching delay reduces unwanted switching caused by short-lived variations in light intensity, while the separate TLs sensor can be positioned where it can accurately monitor natural daylight. This combination makes the TL1 particularly suitable for energy-conscious automatic control of exterior lighting.
Typical Applications
- Garden and landscape lighting.
- Car park and pathway lighting.
- Building entrance and courtyard lighting.
- Exterior commercial lighting.
- Security and perimeter lighting.
- Shopfront and façade lighting.
- Lighting requiring automatic dusk-to-dawn operation.
