ERT/ERTC-01 is a microcontroller controlled programmable time relay device with a wide range of time scale designed to operate in one of 4 different functions that are On delay, Off delay, Down timer, Flasher modes. Output relay is controlled by set value that can be set between 1.0 sec 100 hours. Programmed function and set values are recorded at non-volatile memory. Functions and set values can be programmed easily by buttons on the front panel. ERT/ERTC-01 has optically isolated Start, Stop and Reset inputs.