Omron Sysmac NX-PD1000 User Manual page 56

3 Part Names and Functions
 I/O PWR Indicator
This is mounted only on the Additional I/O Power Supply Unit.
Color
Green
3 - 8
This indicator shows the I/O power supply status of
an Additional I/O Power Supply Unit.
Status
Lit The I/O power is supplied.
Not lit The I/O power is not supplied.
Description
NX-series System Units User's Manual (W523)