1 Features and System Configuration
1 - 2
NX-series Digital I/O Unit User’s Manual (W521)
1-1
Features and Types of Digital I/O
Units
This section describes features and types of Digital I/O Units.
The Digital I/O Units are NX Units to process inputs and outputs of digital signals (ON/OFF signals).
The NX-series Digital I/O Units have the following features.
When the EtherCAT Coupler Unit is used together with NX Units that support synchronous I/O refresh-
ing, the I/O control of multiple NX Units can be synchronized at the time to synchronize with the refresh
cycle of the NX bus.
This provides an accurate I/O control because it suppresses jitter in the I/O timing of multiple NX Units.
You can use EtherCAT Coupler Units with NX Units that support input refreshing with input changed
time and with other NX Units that support output refreshing with specified time stamp to control the out-
puts at fixed intervals after the sensor inputs change.
The terminal block is a screwless clamping terminal block.
You can connect the wires simply by pushing the ferrules into the terminals. The amount of wiring work
is reduced without requiring the use of screws.
1-1-1
Digital I/O Unit Features
Synchronous I/O with Refresh Cycle of the NX Bus
Controlling Outputs at Fixed Intervals After Inputs Change
Simple I/O Wiring with a Screwless Clamping Terminal Block
External output device
(Output)
Workpiece
Sensor
(Input)
Fixed interval
When input changes
When output is made
Summary of Contents for NX-IA3117
Page 34: ...Sections in this Manual 32 NX series Digital I O Unit User s Manual W521...
Page 52: ...1 Features and System Configuration 1 18 NX series Digital I O Unit User s Manual W521...
Page 56: ...2 Specifications 2 4 NX series Digital I O Unit User s Manual W521...
Page 152: ...5 I O Refreshing 5 36 NX series Digital I O Unit User s Manual W521...
Page 204: ...8 Digital Mixed I O Units 8 8 NX series Digital I O Unit User s Manual W521...
Page 224: ...9 Troubleshooting 9 20 NX series Digital I O Unit User s Manual W521...
Page 230: ...10 Inspection and Maintenance 10 6 NX series Digital I O Unit User s Manual W521...
Page 337: ...I 1 I NX series Digital I O Unit User s Manual W521 Index...
Page 340: ...I 4 NX series Digital I O Unit User s Manual W521 Index...