Finder 12.A4 Astro Time Switch regulates lighting level according to time-of-day and astro variables, sunset and sunrise

The 12.A4 type is a weekly Astro Time Switch with PWM / 0-10 V analogue output and expands the range of Finder devices designed to program and manage lighting in an optimized way according to the time-of-day and accounting for geographic and seasonal factors.

Finder 12 Series time switches are the ideal solution for programming both private and public lighting systems and are therefore well suited for apartments, houses, common areas of condominiums and offices (gardens, garages, driveways, and similar).

The 12.A4 type Astro Time Switch is specifically designed for applications where a particular level of lighting intensity is required, for particular time periods.

It will, for example, be useful for energy saving and reducing light pollution from advertising signs, shop windows and monuments for those times when the streets are deserted. Equally, it could be used to set night or twilight lighting levels to a minimal, but safe, level particularly at times of little use – such as out-of-hours industrial estates and car parks.
The 12.A4 offers two programming modes: “classic”, using an integrated joystick and “smart“, thanks to NFC technology and the Finder Toolbox NFC app. The latter makes it possible to read an existing program, modify the smallest details with maximum flexibility and to save programs directly to the smartphone.
The 12.A4 is compatible with dimmable electronic ballast/power supplies (accepting either 0-10 V or PWM inputs) as it has a single 0-10 V 10 mA max analogue output or, 30 V, 20 mA max PWM output signal.
The 12.A4 is also compatible with the Finder Type 15.11 Slave Dimmer with a 0-10 V input. With this Dimmer it is possible to control different types of lighting loads: halogen lamps, fluorescent lamps, dimmable electronic ballasts, CFL lamps, dimmable LED lamps.

With the Astro function, it is possible to program and control the lighting based on sunrise and sunset times after easily setting the geographical coordinates.

Major features and functions:

  • Analogue output level (0-99%) settable against Astro Sunset, Sunrise and Time-Clock based times
  • Auxiliary contact programmed to disconnect the supply from the ballast when the analogueoutput falls below 10%
  • Offset function: allows programming of switching times offset from the Astro time (by up to 90 min)
  • Minimum time interval setting – 1 minute
  • Weekly program
  • Summer/Winter time
  • Lock with a 4-digit PIN


Finder, d.o.o.
Peske 17
1236 Trzin, Slovenia
+386 (0)1 561 59 81
[email protected]

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