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TR 648 top2 RC-DCF KNX


  • Digital time switch with yearly and astronomical time program
  • Time synchronisation via connection of external DCF antenna
  • Can be operated without mains supply
  • 8 channels
  • DuoFix spring terminals for 2 conductors each
  • Text-oriented user guidance in display
  • 800 memory locations
  • Interface for OBELISK top2 memory card (PC programming)
  • 8 year power reserve (lithium battery)
  • ON-OFF switching times
  • Pulse program
  • Cycle program
  • Extensive yearly clock functions
  • Astronomical switching function (automatic calculation of sunrise and sunset times for the whole year)
  • Switching preselection
  • Permanent switching ON/OFF
  • Count-down timer
  • Integrated hour counter
  • Holiday program
  • 2 random programs
  • Display backlight (can be turned off)
  • PIN coding
  • Automatic summer/winter time changeover
  • Time and date synchronisation of other bus participants

Technical data

Operating voltage KNX Bus voltage, ≤12 mA
Width 3 modules
Installation type DIN rail
Number of channels 8
Number of memory locations 800
Time accuracy at 25 °C ≤ ± 0,5 s/day (quartz) or DCF77
Shortest switching times 1 s
Display LCD
Ambient temperature -5 °C … +45 °C
Type of protection IP 20
Protection class III according to EN 60 730-1

Connection example

TR 648 top2 RC-DCF KNX

Scale drawings

TR 648 top2 RC-DCF KNX


Article number Data sheet Documents basket
Antenna top2 RC-DCF - Radio control via antenna with top2 RC devices: To ensure good reception, do not install the antenna
                                 in cellars or on distribution boxes. Connection is made via separate 2-wire, unscreened high-voltage power cable (max. 100
                                 m), up to 10 Theben top2 RC devices can be connected. Polarity, short-circuit and interruption of the antenna circuit are
                                 each visually displayed to help with installation.

Antenna top2 RC-DCF

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



Format Download
CAD symbol (DXF/DWG) ZIP
Manual PDF
Operating instructions PDF
Software ZIP
KNX database ZIP
TR 648 top2 RC-DCF KNX - Digital time switch with yearly and astronomical time program

TR 648 top2 RC-DCF KNX

Article number 6489210
Data sheet
Documents basket