Wiring The Built-In Ethercat Port - Omron CJ1W-ID Series User Manual

4 Installation and Wiring
• Ground to 100 Ω or less, and if possible use a separate ground from those of other devices. (Refer to
figure (a) in the diagram below.)
• If using an independent ground is not possible, then use a common ground as shown in figure (b).
Connect to the ground pole of the other device.
Controller
Ground of
100 W or less
(a) Independent grounds:
Best
• Refer to 4-5-6 Grounding on page 4-57 for details on the grounding of the control panel.
Precautions for Safe Use
If the LG and GR terminals are connected, make sure to connect them firmly. The LG terminal
that is a noise-filtered neutral terminal, has a half electrical potential of the input voltage. There-
fore, if you touch the metallic part of the LG terminal, GR terminal, or Controller, while the GR
terminal is not grounded, it may result in electrical shock.
 Crimp Terminals
The terminals on the Power Supply Unit are M4, self-raising terminals with screws.
Precautions for Safe Use
• Use crimp terminals for wiring.
• Do not connect bare stranded wires directly to terminals.
• Tighten the terminal block screws to the torque of 1.2 N·m.
• Use crimp terminals (M4) having the dimensions shown below.
 Crimp Terminals for DC Power Supply
7 mm max.
 When wiring an AC Power Supply Unit, if one power supply phase of the
equipment is grounded, always connect the grounded phase to the L2/N
terminal.
L1
L2/N
4-4-2

Wiring the Built-in EtherCAT Port

For information on wiring the built-in EtherCAT port, refer to the NJ/NX-series CPU Unit Built-in Ether-
CAT Port User's Manual (Cat. No. W505).
4-32
Controller
Other
Other
device
device
(b) Common ground:
Acceptable
Grounding Methods
7 mm max.
Controller
Other
device
(c) Common ground:
Incorrect
NJ-series CPU Unit Hardware User's Manual (W500)