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Solid-State Outputs Each output can handle 500mA of current regardless of the supply voltage, this calculates to 6 watts at 12 volts, or 12 watts at 24 volts. This is why we recommend 24 volt supplies, you will be able to use much larger solenoids without exceeding the 500mA limit. In addition to the 500mA per output limit, there is also an internal fuse that will temporarily open if the sum of currents on all active outputs exceeds 1.1A for too long. The fuse will automatically reset once the excessive draw has been removed. This may sound like a limitation, but not really. Most solenoids draw about 5 watts on average, at 24 volts that's 210mA per solenoid. So four valves could be left on continuously without fear of overloading. There is an LED next to each output connector to indicate it's current on/off status.