Electrically Connected To; Din Track Contact Plate; Ground Terminal (Functional Ground Terminal); Additional Nx Unit Power Supply Unit - Omron NX Series Hardware User Manual

Grounding
type
A7, B7
DIN Track Contact Plates
A Unit that has a ground terminal also has a DIN Track contact plate on the back of the Unit.
The DIN Track contact plate is connected internally to the ground terminal on the Unit.
This means that the ground terminal will be electrically connected to the DIN Track.
Side of the Unit
Ground
terminal
Grounding the CPU Rack
This section describes how to ground the ground terminals on the CPU Rack.
The functional ground terminals that are provided on some Units and the DIN Track are grounded.
CPU Unit
DIN Track
• Using a dedicated ground wire, ground the ground terminals and DIN Track with a ground resist-
ance of 100 Ω or less.
• The ground wire should not be more than 20 m long.
NX-series NX502 CPU Unit Hardware User's Manual (W629)
Symbol
Functional grounding is done to protect device and system functions, including
prevention of noise from external sources, or prevention of noise from devices or
equipment that could have harmful effects on other devices or equipment.

DIN Track contact plate

Connected inside the Unit.

Additional NX Unit Power Supply Unit

Electrically connected to

the DIN Track through the
DIN Track contact plate.
Ground terminal
(Functional ground terminal)
Ground
5 Installation and Wiring
Function

Shield Connection Unit

Ground terminal
(Functional ground
terminal)
5
End Cover
5-39