diff --git a/doc/pmon/pmon-chassis-images/pmon-chassis-distributed-thermalctld.png b/doc/pmon/pmon-chassis-images/pmon-chassis-distributed-thermalctld.png new file mode 100644 index 00000000000..7613241ea6b Binary files /dev/null and b/doc/pmon/pmon-chassis-images/pmon-chassis-distributed-thermalctld.png differ diff --git a/doc/pmon/pmon-chassis-images/pmon-chassis-stack.png b/doc/pmon/pmon-chassis-images/pmon-chassis-stack.png new file mode 100644 index 00000000000..1cbf00cc5cd Binary files /dev/null and b/doc/pmon/pmon-chassis-images/pmon-chassis-stack.png differ