Specifications

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BooBox FlexMax FI-216 Operating Manual - page 4
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Power Supply
Selecting your Power Supply
The FlexMax requires a 12 or 24 volt DC power supply. When using 24 volts, the power supply must be
regulated. The Flex does not ship with a power supply, you must purchase your own supply based on the
required voltage and current of your outputs. We highly recommended using a 24 volt power supply. This will
get you the most wattage from the audio amplifier and enable you to use larger solenoids without exceeding the
maximum current capacity of the solid-state outputs. It will however require that all the devices connected to
your outputs be rated for 24 volts.
Sizing Your Power Supply
To size a supply you must calculate for the worst-case scenario. Add up the wattage for the most outputs that
will be on at any one time. If you are using the internal amplifier, add at least 25 watts if you’re playing at a
moderate volume, or 50 watts if you’ll be turning it up really loud. Then add 5 watts for the FlexMax.
So for example, let’s say you have 10 x 6 watt 24 volt solenoids, but only 4 are on at any given time, and you
want to use the amplifier at a moderate volume.
24 watts (4 x 6 watt solenoids) + 25 watts (amplifier) + 5 watts (FlexMax) = 54 watts
You’d need a 24 volt regulated DC supply rated for at least 54 watts.
DO NOT use unregulated 24 volt power supplies. They will exceed the maximum
24 volt input limit and damage the internal amplifier.
Connecting your Power Supply
The power supply can be connected to the 2.1mm barrel connector or the terminal block.
Sharing the Power Supply with other Devices
The power terminal block and barrel connector are internally connected. This makes it easy to share the power
supply with another device provided your power supply has enough wattage to go around.