Is it considered powered? Or is it basically like a potentiometer?
Argh.
<R46>
A. Each speed controller branch circuit must be protected by one and only one 20-amp, 30-
amp, or 40-amp circuit breaker on the Power Distribution Board. No other electrical load
can be connected to the breaker supplying this circuit.
<R44> Custom circuits shall NOT directly alter the power pathways between the battery, Power
Distribution Board, speed controllers, relays, motors, or other elements of the robot control
system (including the power pathways to other sensors or circuits).
Custom high impedance
voltage monitoring or low impedance current monitoring circuitry connected to the ROBOT’S
electrical system
is acceptable, because the effect on the ROBOT outputs should be
inconsequential.
<R66> Inputs to custom circuits can be connected only to the following sources:
A. Power Distribution Board protected 12Vdc outputs
The only real information I've found is in the "suggestions" PDF, and it just says to use good engineering judgment. Since the Analog breakout can handle direct motor current to measure battery level, engineering judgment tells me that it has sufficient internal impedance to handle this job without worry. The voltage I measure is maxing out around 60 mV, and since current isn't an issue.....
I
think this has become a Q&A question.... ha. Then Again, maybe I'm overthinking this and it's just illegal, like you said.