Updated Controller Boxes (markdown)

Author: adeguet1

Controller-Boxes.md

@@ -107,6 +107,7 @@ The dVRK controllers have LEDs grouped in different sections, Power and Card(s).
 
 ## Power
 
+The power LED logic is controlled by the two boards mounted on the front panel of the controllers.  The details can be found on [WPI page from the ISI Research Wiki](https://research.intusurg.com/index.php/DVRK:GroupPages:WPI#User_Guides).
 The LEDs are:
 * Logic: power used for the FPGA board, i.e. on board computing/logic
 * Rail A/B: power supplies used for motor control (see details above).  MTM controllers have two different motor power supplies so the Rail A and B LEDs are meaningful, PSM, ECM and SUJ controllers use a single motor power supply so the only meaningfull LED is Rail A.  Rail A/B, i.e. motor power, can be turned on/off using a PC and need the [safety chain](/jhu-dvrk/sawIntuitiveResearchKit/wiki/ESTOP) to be closed.
@@ -119,6 +120,8 @@ In general, the LEDs for power follow the following convention:
 
 ## Cards A and B
 
+These LEDs replicate the LEDs from the QLA boards.
+
 * The LEDs A/B (or C/D for the second card) are used to show that the firmware is fully loaded.  When the firmware is fully loaded both LEDs will go back and forth between red and green
 * The LED MV is for Motor Voltage.  It should turn to green when motor power is requested
 * The 8 LEDs (4 for Card A and 4 for card B) labelled either "Fault" (older controllers) or "Status" (recent controllers) turn red when an axis is powered.  When powered on, there should be 7 red LEDs for the MTM, PSM and ECM controllers and 4 for the SUJ controller.  With software version 1.7 and lower, there should be 8 red LEDs for MTM controllers