The TR series are a range of digital time switches from Theben / Timeguard which feature a large variety of functionality including yearly and astronomical programs, automatic summer / winter time changeover, Interface for OBELISK top2 memory card (PC programming), up to 800 memory locations and a 10 year power reserve (via a lithium battery). There are both single and quad channel versions available from Theben / Timeguard with up to 16 A resistive load switching capabilities.

Digital time switch with yearly and astronomical time program functions
Connectable sensors (external selector switch, sequence timer)
Connectable switches (ON or OFF permanent switching)
DuoFix spring terminals
Wire diameter: 0.5 → 2.5 mm²
Button for releasing plug-in connection
Text-oriented user guidance in display
Up to 800 memory locations available
Interface for OBELISK top2 memory card (PC programming)
10 year power reserve (lithium battery)
Automatic summer/winter time changeover
Pulse program and cycle program
Extensive yearly clock functions
Basic weekly program and 14 different weekly programs with priority levels and date ranges
Permanent ON / permanent OFF with highest priority via date range program option
Fixed and variable public holidays, public holidays dependent on Easter, day and date ranges with serial pattern
Astronomical time switch function (automatic calculation of sunrise and sunset times for the whole year)
Offset availble for adjusting of sunrise and sunset times
Integrated count down timer
Integrated operating hour counter functionality
Display back light (can be turned off if not desired)