OpenSprinkler Forums Hardware Questions OpenSprinkler Pi (OSPi) Extension board fuse usage? Reply To: Extension board fuse usage?



There is a fuse in line with the COM wire. If you want to protect each individual valve line, you can add additional fuse in line from each station port to the station wire. 500 mA /250 V fuse should be fine but is a bit low on the amperage. Each valve draws about 400 to 500mA impulse current and 250 to 350mA holding current.