TR 609 Top 2- Digital Time Switch. TR609 Top 2 digital time switch with weekly programming. Features and Benefits. 1 Channel 84 Memory locations External input - Connectable sensors (external selector switch, sequence timer) - Connectable switches (On or Off permanent switching) Pulse program Cycle program Timer countdown 2 Random programs DuoFix spring terminals - For 2 conductors each - Wire or strand (with or without wire end sleeve) - Button for releasing plug-in connection Text-orientated user guidance in display - Preset date and time - Fully operable without mains connection Interface for OBELISK top2 memory card (PC programming) - 2 Insertable switching program - Copying and storing programs 10-year power reserve (lithium battery) On-Off switching times Switching preselection Permanent switching on/off Integrated operating hour counter - Reset option - Service function for monitoring maintenance intervals Holiday program PIN coding Automatic summer/winter time changeover - Can be deactivated - Data rule options are already stored for Europe, USE and other countries - Own data rule options or changeover around set dates are available