[Al Skierkiewicz]

In addition to the analog module installed in slot one, you must have the breakout card in place and the jumper on that device installed. The jumper puts battery voltage on the input to the analog module that is sampled and returned to the dashboard. This signal is also included in a packet that is read by the FMS during competition.
From Section 4
<R61> A National Instruments 9201 module must be installed in slot 1 of the cRIO-FRC . An analog breakout must be connected to this module. A jumper must be installed in the “Power” position (two outer pins) on the analog breakout. The analog breakout must be powered from the PD Panel. (Please refer to the 2011 FRC Control System Manual for details on these connections.)