Time-controlled temperature controller, Rx Series 1930, glossy black. Temperature controller, normally open, with central piece, time-controlled, integrated temperature sensor, backlit display with text display. With manual/automatic mode switch, frost protection function, key lock, adjustable temperature control range, calibratable temperature value, 4 temperature modes selectable, thermal feedback via software, adjustable hysteresis, for heating or cooling operation. Easy programming of switching times thanks to integrated copy function, program memory protected against power failure, 3 preset time programs individually adjustable. Note: Neutral conductor required!