Controller for two pumps, ordered by two pressure or floating switches. Each time P1 closes, the other pump starts. When P2 closes, both pumps start. There is a 4sec delay for the second pump. The output voltage in the pressure switches is, for safety reasons, 12 VDC.
Supply: 220V AC 50HZ
Power: 3VA MAX
Max contact amps: 10A AC
Max contact voltage: 380V AC/DC