Macromatic THR-3856UProduct Attribute Attribute Value Function Multi Function Overview Macromatics THR 3 Series Time Delay Relays come with four functions and four timing ranges covering 0. 1 second to 100 minutes (1,000 minutes on THR 3856U dual time unit). On the same unit, choose between onboard adjustable, onboard fixed and remote adjustable time delay setting (remote time delay not available on THR 3856U). All set up is done with DIP switches for ease of use. A