Omron NX701-1700 User Manual page 136

4 Installation and Wiring
 Controller Ground Terminals
The Controller has the following two ground terminals.
Terminal
name
LG Functional
Grounding
GR Protective
Grounding
When the functional ground terminal is correctly grounded, it is generally effective in suppressing
power supply common noise. Occasionally, however, grounding this terminal will result in picking up
more noise, so be careful when using it.
AC side
Controller Ground Terminals
 When wiring to an AC Power Supply Unit, if one power supply phase of the
equipment is grounded, always connect the grounded phase to the L2/N ter-
minal.
L1
L2/N
4 - 50
Grounding
Symbol
type
Ground this terminal when power supply noise causes malfunc-
tioning.
Always ground this terminal to prevent electrical shock.
Controller side
Connection
NX-series CPU Unit Hardware User's Manual (W535)