Omron NV3W-MR20L-V1 Operation Handbook page 5

 When the CP1E uses a 24-VDC power supply
Wire the 24-VDC power supply as shown below.
24-VDC power supply
 When the NV3W-V1 (24-VDC type), the NV4W, or the NV3Q is connected
with a RS-232C cable
Wire the NV and the PLC as follows. The power is supplied from the external supply unit to
the PT.
XW2Z-200T-3

(2 m, without 5-V Line)
XW2Z-500T-3

(5 m, without 5-V Line)
 Using a Vertically Mounted PT (NV3W-V1 and NV4W only)
The NV3W-V1 and NV4W PTs can be mounted vertically.
Mount the PT with the serial communications/power supply
connector on top.
NV-series PT Simple Operation Handbook
Upper terminal block
Name (color)
24-VDC power supply
RD (orange)
SD (blue)
SG (pink)
FG (black)
Ground to 100 ohm or less
NV3W-V1 (24-VDC)/NV4W/NV3Q
5