Quote:
Originally Posted by ShadowFireGT
This is for the operator interface. From the OI reference guide:
[1] The DISABLE dipswitch on the Operator Interface
[2] LED drivers provide 5V at 10mA
[3] +5V Aux is to be used for potentiometers in Joysticks and custom I/O boxes.
[4] Do not use +5V Aux for lamps or LEDs.
[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 reason I ask this is due to number 4. But this isn't stated in the rules themselves. Will doing this void a warranty or something else that I don't want to do? |
For more detail than perhaps you are looking for, read through one of my previous posts
here.
To answer your origional question directly, the consequence is that you'll pull down the voltage on the +5v aux pin, and thus limit the maximum value that any of your analog joystick values could report. For each ~4.4mA of current drawn from this pin, the maximum A/D count will drop by 1 count. If your LED's were powered all the time, then your software could account for this, but if the LED's were modulated on and off, then the analog values for all of your joystick postions would be modulated along with the LEDs.
For LED power, please see the latest IFI documentation. I pointed out some errors to IFI and they've updated them to properly indicate that the outputs are not specifically 5v outputs. Unless you are using the LED outputs for something else, these outputs would be the best ones to utilize for general illumination requirements.