SELEKTA 175 top2


  • Astronomical time switch with weekly program
  • 1 channel
  • External input
  • 56 memory locations
  • Astronomical time switch function (automatic calculation of sunrise and sunset times for the whole year)
  • Offset for adjusting of sunrise and sunset times
  • DuoFix spring terminals
  • Text-oriented user guidance in display
  • Interface for OBELISK top2 memory card (PC programming)
  • 10 year power reserve (lithium battery)
  • Calculated astronomical switching times
  • Fixed ON-OFF switching times can be programmed (e.g. night time interruption)
  • Switching preselection
  • Permanent switching ON/OFF
  • Integrated operating hour counter
  • Holiday program
  • PIN coding
  • Automatic summer/winter time changeover

Technical data

Operating voltage 230 – 240 V AC
Frequency 50 – 60 Hz
Width 1 modules
Installation type DIN rail
Type of contact NO contact
Opening width < 3 mm
Program Weekly program, Astronomical program
Program functions ON-OFF
Number of channels 1
External inputs 1
Number of memory locations 56
Power reserve 10 years
Switching capacity at 250 V AC, cos φ = 1 16 A
Switching capacity at 250 V AC, cos φ = 0,6 4 A
Incandescent/halogen lamp load 230 V 2000 W
Energy saving lamps 230 V 300 W
LED lamp < 2 W 55 W
LED lamp 2-8 W 180 W
LED lamp > 8 W 200 W
Fluorescent lamp load (conventional) not corrected 2000 VA
Fluorescent lamp load (conventional) series-corrected 2000 VA
Fluorescent lamp load (conventional) parallel-corrected 1300 W
Fluorescent lamp load (electronic ballast) 1200 W
Switching capacity min. ~10 mA
Shortest switching times 1 min
Time accuracy at 25 °C typical ± 0,25 s/day (quartz)
Time basis Quartz
Stand-by consumption ~0,4 W
Capacity loss max. 1,2 W
Memory card supplied
Type of connection DuoFix spring terminals
Housing and insulation material High-temperature resistant, self-extinguishing thermoplastic
Type of protection IP 20
Protection class II according to EN 60 730-1
Ambient temperature -25 °C … +55 °C

Connection example

SELEKTA 175 top2


Article number Data sheet Documents basket
PC set OBELISK top2 - Switching programs created on the PC by means of the convenient OBELISK top2 software can be transferred
                                 via USB interface to the OBELISK top2 memory card and from the card to the time switch and vice versa. Thus no PC or laptop
                                 is required on-site. Programming and the program printout can be done comfortably from the desk

PC set OBELISK top2

Memory card OBELISK top2 - Individual memory card

Memory card OBELISK top2

Front panel kit - The front panel installation set is suitable for Theben distributor installation devices of 17.5 to 107.5
                                 mm width

Front panel kit



Format Download
Operating instructions PDF
Product information PDF
Tender texts DOC
Software ZIP
SELEKTA 175 top2 - Astronomical time switch with weekly program

SELEKTA 175 top2

Article number 1750100
Data sheet
Documents basket