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#1   — Edited

Not sure what you're asking here. However I'll guess it's a power feed question.

You can feed 12 VDC to devices and motors through the EZB as the EZB is able to handle up to 17vDC. However there is a 20 amp limit you can draw through the EZB. At least that's the fuse size they place in the power base. Remember that the voltage you feed the EZB will come out of the power pins on the digital ports. Make sure that all your servos and devices combined don't pull more than 20 amps if you are channeling the power through the EZB.

Also if you're drawing a lot of current through the EZB you may experience the unit browning out and resetting. I was once powering a high torque servo that was only drawing 5 amps when it was under load and my EZB was browning out.

Do not feed power to servos that require more than 17 vdc through the EZB. A better solution to feeding power to high torque and high powered servos is to feed them "around" the EZB. Feed the EZB and the servos on separate circuits. You can use the same power supply as long as your total amperage (current) load from all devices and motors does not exceed what the power supply is rated for. For example, If you have 24vdc motors and your other devices like the EZB need lower voltages you can use a 24 volt dc supply and step down the voltage through a buck converter to the devices needing a lower voltage. Again, watch your amp loads.

It's also important you have the proper size conductor and connections that will handle your devices and motor's current needs. If your wire or connections are too small they're going to heat up, melt, start on fire or starve the devices needing the amps that are being drawn from the power supply. The motors and devices will try to draw as much current as they need and won't stop till they get what they want. If your circuit or power supply can't keep up then heat builds up and something will fail.

Hope this helps.