5 I/O Refreshing
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NX-series Digital I/O Unit User’s Manual (W521)
For cases in which NX-ID3344 and NX-OD2154 are used for NX-series NX1P2 CPU Units, this section
explains only the points different from the case of using an EtherCAT Slave Terminal.
The points of difference are shown below. To use by connecting to the CPU Unit, read a given example
with the points of difference in mind.
z Unit Configuration
The Unit configuration is given in the following figure.
To use an NX1P2 CPU Unit, you need to add an Additional I/O Power Supply Unit to the right of the
CPU Unit in order to supply I/O power to NX-ID3344 and NX-OD2154.
By adding an Additional I/O Power Supply Unit, 1 is added to the unit number of the NX-ID3344 and
NX-OD2154 as well as the number in its device name, as shown below.
When Used by Connecting to the CPU Unit
Unit number Model Unit
Device
name
1NX-PF Additional I/O Power Supply Unit N1
2
NX-ID3344 Digital Input Unit that supports input refreshing
with input changed time
N2
3
NX-OD2154 Digital Output Unit that supports output refreshing
with specified time stamp
N3
Additional I/O Power
Supply Unit
NX-PF
Output Unit
NX-OD2154
Input Unit
NX-ID3344
NX-series
NX1P2
CPU Unit
External output
device (Output)
Workpiece
Sensor
(Input)
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