diff --git a/firmware/klipper_configurations/VORON2_stock_250_printer.cfg b/firmware/klipper_configurations/VORON2_stock_250_printer.cfg
index b2928e3..7e38aa6 100644
--- a/firmware/klipper_configurations/VORON2_stock_250_printer.cfg
+++ b/firmware/klipper_configurations/VORON2_stock_250_printer.cfg
@@ -58,6 +58,7 @@
 # Thermistor types                      [extruder] and [heater_bed] sections - See 'sensor types' list at end of file
 # Microswitch (z endstop) location      [homing_override] section
 # Microswitch (z endstop) offset for Z0 [stepper_z] section
+# Inductive Probe Type (NC/NO)          [probe] section
 # Probe points                          [quad_gantry_level] section
 # Min & Max gantry corner positions     [quad_gantry_level] section
 # PID tune                              [extruder] and [heater_bed] sections
@@ -258,7 +259,9 @@ max_temp: 270
 # may set the stepper_z endstop_pin to this virtual pin on cartesian
 # style printers that use the probe in place of a z endstop.
 pin: ^!z:ar19
-#   Z_MAX on mcu_z
+#   Z_MAX input on mcu_z
+#   use '^!z:ar19' for "Normally Open" probes like the PL-08N, PL-05N, TL-Q5MC1
+#   use '^z:ar19' for "Normally Closed" probes like the PL-08N2, PL-05N2, TL-Q5MC2
 x_offset: 0.0
 y_offset: 25.0
 #   Offset (in mm) for inductive probe Y direction from nozzle
diff --git a/firmware/klipper_configurations/VORON2_stock_300_printer.cfg b/firmware/klipper_configurations/VORON2_stock_300_printer.cfg
index cc7b862..45fcc88 100644
--- a/firmware/klipper_configurations/VORON2_stock_300_printer.cfg
+++ b/firmware/klipper_configurations/VORON2_stock_300_printer.cfg
@@ -58,6 +58,7 @@
 # Thermistor types                      [extruder] and [heater_bed] sections - See 'sensor types' list at end of file
 # Microswitch (z endstop) location      [homing_override] section
 # Microswitch (z endstop) offset for Z0 [stepper_z] section
+# Inductive Probe Type (NC/NO)          [probe] section
 # Probe points                          [quad_gantry_level] section
 # Min & Max gantry corner positions     [quad_gantry_level] section
 # PID tune                              [extruder] and [heater_bed] sections
@@ -258,7 +259,9 @@ max_temp: 270
 # may set the stepper_z endstop_pin to this virtual pin on cartesian
 # style printers that use the probe in place of a z endstop.
 pin: ^!z:ar19
-#   Z_MAX on mcu_z
+#   Z_MAX input on mcu_z
+#   use '^!z:ar19' for "Normally Open" probes like the PL-08N, PL-05N, TL-Q5MC1
+#   use '^z:ar19' for "Normally Closed" probes like the PL-08N2, PL-05N2, TL-Q5MC2
 x_offset: 0.0
 y_offset: 25.0
 #   Offset (in mm) for inductive probe Y direction from nozzle
diff --git a/firmware/klipper_configurations/VORON2_stock_350_printer.cfg b/firmware/klipper_configurations/VORON2_stock_350_printer.cfg
index daea008..ccf3a05 100644
--- a/firmware/klipper_configurations/VORON2_stock_350_printer.cfg
+++ b/firmware/klipper_configurations/VORON2_stock_350_printer.cfg
@@ -58,6 +58,7 @@
 # Thermistor types                      [extruder] and [heater_bed] sections - See 'sensor types' list at end of file
 # Microswitch (z endstop) location      [homing_override] section
 # Microswitch (z endstop) offset for Z0 [stepper_z] section
+# Inductive Probe Type (NC/NO)          [probe] section
 # Probe points                          [quad_gantry_level] section
 # Min & Max gantry corner positions     [quad_gantry_level] section
 # PID tune                              [extruder] and [heater_bed] sections
@@ -258,7 +259,9 @@ max_temp: 270
 # may set the stepper_z endstop_pin to this virtual pin on cartesian
 # style printers that use the probe in place of a z endstop.
 pin: ^!z:ar19
-#   Z_MAX on mcu_z
+#   Z_MAX input on mcu_z
+#   use '^!z:ar19' for "Normally Open" probes like the PL-08N, PL-05N, TL-Q5MC1
+#   use '^z:ar19' for "Normally Closed" probes like the PL-08N2, PL-05N2, TL-Q5MC2
 x_offset: 0.0
 y_offset: 25.0
 #   Offset (in mm) for inductive probe Y direction from nozzle