The 1078-1 is simply programmed by DIP switches & potentiometers & incorporates four diffrent switching functions. It mounts directly onto Burkert solenoid valves using the same three prong connection. This unit is perfect for simple tasks like compressor blowdown where reliability is required.
The 1078-2, which has eight diffrent switching functions, is operated by a two button programmer (1077-2) with a small digital display. As changes are only possible via the programmer the unit is safely locked when it is removed. Multiple timers can simply be programmed as the last settings always remain in the 1077-2.