Omron NX-ECC201 User Manual page 143

If the DIN Track is made of steel and the surface is not treated to produce an insulating material, you
can omit grounding the functional ground terminal on any Unit that has one, as shown in the following
figures.
■
DIN Track Made of Steel and Surface Not Insulated
EtherCAT Coupler Unit
DIN Track
Precautions for Correct Use
• Ground the ground terminals and DIN Track through dedicated ground wires to a ground
resistance of 100 Ω or less. The ground wire should not be more than 20 m long. Use a
ground wire that is 2.0 mm
twisted wire be used for the ground terminal on a screwless clamping terminal block.
• If the DIN Track is not made of steel or if the surface is treated to produce an insulating mate-
*1
rial , always connect ground wires to the ground terminals. Otherwise, noise may cause
malfunctions.
*1. If the surface of the DIN Track is treated to produce an insulating material (e.g., anodized aluminum), the DIN
Track contact plate will not be electrically connected to the DIN Track even if they are in physical contact.
Grounding the DIN Track
Secure the ground wire to a mounting hole on the DIN Track with screws to ground the DIN Track.
Grounding the EtherCAT Slave Terminal with Peripheral Devices and
in Control Panels
Refer to 6-2-6 Grounding on page 6-31 for the grounding procedures for the EtherCAT Slave Terminal
with peripheral devices and in control panels.
NX-series EtherCAT Coupler Unit User's Manual (W519)
Additional NX Unit Power Supply Unit
Electrically connected to the DIN Track
through the DIN Track contact plate.
Functional ground terminal
Ground
2
or larger. However, the wire must be 2.0 mm
Shield Connection Unit
Functional ground terminals
7 Wiring
End Cover
2
and a ferrule or
7 - 11
7