Letter Name Function
H ID information indication Shows the ID information of the CPU Unit.
3-1-8 ID Information Indication on page 3-12
I
Built-in EtherNet/IP port (port 1) Connects the Ethernet with an Ethernet cable.
Use port 1 to perform OPC UA communications.
J Built-in EtherNet/IP port (port 2)
K Built-in EtherCAT port (port 3) Connects the EtherCAT with an Ethernet cable.
L Battery slot Allows a separately-sold backup battery to be mounted into
the CPU Unit.
M Battery connector Connects a separately-sold backup battery to the CPU Unit.
N DIP switch Used in Safe Mode or when backing up data. Normally, turn
OFF all of the pins.
O SD Memory Card cover A cover for the SD Memory Card and the DIP switch. It opens
toward the right.
P Operation Status Indicators Shows the operation status of the CPU Unit by multiple indi-
cators.
3-1-4 Operation Status Indicators on page 3-
6
Q
End Cover A cover to protect the NX Unit and CPU Unit.
One End Cover is provided with the CPU Unit.
R X Bus connector This connector is used to connect the CPU Unit to the X Bus
Unit on the left of the CPU Unit.
S DIN Track contact plate This plate is used to contact the functional ground terminal
with a DIN T
rack.
3-1-3
DIP Switch
Set the DIP switch when backing up data or using Safe Mode, etc. The meanings of each function,
DIP switch settings, and reference manuals are shown in the table below. If you do not want to use
these functions, turn OFF all pins.
The figure below shows an example setting when the Safe Mode is used.
Function Meaning
DIP switch
Reference manual
4 3 2 1
Backup You can back up all of the da-
ta in the Controller to an SD
Memory Card.
OFF ON OFF OFF NJ/NX-series CPU
Unit Software User’
s
Manual (Cat. No.
W501)
Restore
*1
You can transfer the various
setting data stored in the SD
Memory Card to the Control-
ler.
ON
ON OFF OFF
Automatic transfer
from SD Memory
Card
*1
You can automatically transfer
the various setting data stored
in the SD Memory Card to the
Controller when the power is
turned ON.
OFF OFF ON OFF
3 Configuration Units
3-5
NX-series NX502 CPU Unit Hardware User's Manual (W629)
3-1 CPU Units
3
3-1-3 DIP Switch
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