Theben Timer Light Switch 230 V ac

Staircase time switch ELPA 7 is an electronic staircase time switch with automatic 3 or 4 conductor detection.

Electronic staircase time switch
Extremely accurate
Push button input with electronic overload protection
Automatic 3 or 4 conductor detection (4 conductor with connection for floor lighting, 3 conductor no longer permitted for new systems)
Immediate secondary switching
Toggle switch for permanent light

Staircase