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4 Installation and Wiring
NJ-series CPU Unit Hardware User’s Manual (W500)
4-4 Wiring
4
4-4-2 Wiring the Built-in EtherCAT Port
Crimp Terminals for DC Power Supply
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.
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).
I/O Unit Specifications
Double-check the specifications for the I/O Units. Be particularly careful of the following to prevent
failure, damage, and fires.
• Make sure that voltages of the external power supplies are within the ratings of the I/O Units.
• Make sure that load currents are within the ratings of the Output Units.
• Make sure that power supply terminals with polarity are connected correctly.
Electric Wires
• The following wire gauges are recommended.
• The current capacity of electric wire depends on factors such as the ambient temperature and
insulation thickness as well as the gauge of the conductor.
Crimp Terminals
The terminals on the I/O Unit are M3, self-raising terminals with screws.
4-4-2 Wiring the Built-in EtherCAT Port
4-4-3 Wiring CJ-series Basic I/O Units with Terminal Blocks
Precautions for Wiring I/O Units
Terminal Block Connector Wire Size
18-terminal
AWG 22 to 18 (0.32 to 0.82 mm
2
)
7 mm max.
7 mm max.
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