[Mike Copioli]

Originally Posted by Kevin Sevcik

Mike,

The 100ma is coming from the OI reference Guide. It says the current limit on the +5V aux pin is 100ma for all 4 ports. If the practical limit is significantly lower than this by a factor of 10 for some reason... well it'd be nice to know, and it'd be nice if IFI updated the reference.

EDIT: Finished your post. MICROamps on the 5V aux? The reference clearly says 100mA. If the limit is truly microamps, then IFI really needs to update this document.

I was basing the aux rating on information given to me by IFI. And you should read this more carefully.

[5] The current limit of the +5V Aux from all 4 ports is about 100mA. The Aux Fault Led will start illumination when the current draw from the +5V Aux Outputs total about 120 mA and the +5V Aux voltage will have dropped to about 4.5 volts. Worse case, short condition: after about 30 seconds, the voltage will be at about 300 mV with a current of about 250 mA.

The limit from ALL FOUR PORTS is 100 mA. (This means all four added together.) When the outputs exceed 120mA the Fault LED will Illuminate. And it clearly states that after 30 seconds the voltage will be clamped to 300mV. If you do further testing you will come to the inevitable conclusion that you cannot get 100mA from one joyport continuosly.