Update VH-109 wiring (#2965)

Update VH-109 wiring to prevent PoE back to roboRIO

source/docs/zero-to-robot/step-1/basic-robot-wiring.rst

@@ -377,6 +377,8 @@ After making the connection check to be sure that it is clean and secure:
 
 .. note:: The radio can additionally be powered by :term:`PoE` to create a more redundant connection.
 
+.. warning:: If powering the radio this way, the roboRIO must be connected via a PoE injector, modified ethernet cable, or to one of the `AUX` ports of the VH-109.
+
 ## Pneumatics Power (Optional)
 
 .. tab-set::
@@ -429,6 +431,8 @@ Requires: an Ethernet cable
 
 .. note:: If using :term:`PoE` you may need a second Ethernet cable or longer power wires.
 
+.. warning:: If the VH-109 is powered using the 12V input terminals, the roboRIO should be connected to the VH-109 through a PoE injector, a modified ethernet cable, or to one of the `AUX` ports on the VH-109 instead of the `RIO` port.
+
 .. warning:: DO NOT connect the Rev passive :term:`PoE` injector cable directly to the roboRIO. The roboRIO MUST connect to the socket end of the cable using an additional Ethernet cable as shown in the next step.
 
 ## CAN Devices

source/docs/zero-to-robot/step-1/intro-to-frc-robot-wiring.rst

@@ -30,6 +30,7 @@ Locate the following control system components and tools
   - 1x 30A Circuit breaker
   - 6 AWG (16 :math:`mm^2`) Red wire
   - 18 AWG (1 :math:`mm^2`) Red/Black wire
+  - (Optional) REV PoE Injector cable or similar
   - 12 Wago 221 inline splicing connector with lever
   - 2x Anderson SB50 battery connectors
   - 6 AWG (16 :math:`mm^2`) Terminal lugs
@@ -245,11 +246,18 @@ Using 18AWG wire, connect a non-switchable fused channel (20-22) with a 10A fuse
 ## Ethernet Cables
 
 .. image:: images/how-to-wire-a-simple-robot/radio-ethernet-kitbot.jpg
-  :alt: Picture of the KitBot showing radio ethernet cable.
+  :alt: Picture of the KitBot showing radio ethernet cable with PoE injector.
 
-Requires: 1x Ethernet cables
+Requires: 1x Ethernet cable, (Optional) 1x REV PoE injector or similar
 
-Connect an Ethernet cable from the RJ45 (Ethernet) socket of the roboRIO to the port on the VH-109 radio labeled RIO.
+Connect an Ethernet cable from the RJ45 (Ethernet) socket of the roboRIO to the socket of the REV PoE injector. Either remove or individually insulate the red and black power wires of the injector (the injector is not long enough to reach the PDH with the KitBot wiring layout). Connect the plug end of the REV PoE injector into the port on the VH-109 labeled RIO.
+
+.. collapse:: Alternative
+
+    .. image:: images/how-to-wire-a-simple-robot/radio-ethernet-kitbot-alt.jpg
+        :alt: Picture of the KitBot showing radio ethernet cable plugged into VH-109 AUX port.
+
+    Connect an Ethernet cable from the RJ45 (Ethernet) socket of the roboRIO to the port on the VH-109 radio labeled AUX2.
 
 
 ## Robot Signal Light