Omron NX-EIC202 EtherNet/IP Coupler Unit for NX-Series Remote I/O Systems
The Omron NX-EIC202 is an EtherNet/IP Coupler Unit designed as the interface between an EtherNet/IP industrial network and NX-series I/O units. As part of the NX-series I/O system, the NX-EIC202 provides flexible remote I/O configuration combined with the speed and determinism of the EtherNet/IP protocol. The coupler unit connects to an EtherNet/IP scanner, such as an NJ/NX-series Machine Automation Controller, and enables communication with up to 63 NX I/O units. The NX-EIC202 is suitable for high-performance machine automation applications requiring distributed I/O with real-time data exchange.
Product Specifications
Model: NX-EIC202 EtherNet/IP Coupler Unit
Product Series: NX-series I/O System
Number of Connectable NX Units: 63 Units max
Communications Protocols: EtherNet/IP, UDP/IP, TCP/IP (Message Services)
Link Speed: 100 Mbps
Physical Layer: 100BASE-TX (IEEE 802.3)
Received Packet Interval (RPI): 4 to 1,000 ms
Transmission Distance: 100 m or less between nodes
Transmission Media: Category 5 or higher twisted-pair cable
Unit Power Supply: 24 VDC (20.4 to 28.8 VDC)
NX Unit Power Supply Capacity: 10 W max
I/O Power Supply: 5 to 24 VDC
Current Capacity of Power Supply Terminals: 4 A max
Mounting: Panel mount with screwless push-in connectors
Ambient Operating Temperature: 0°C to 55°C
Ambient Storage Temperature: -25°C to 70°C
Ambient Humidity: 10% to 95% (with no condensation or icing)
Vibration Resistance: Conforms to IEC 60068-2-6
Shock Resistance: 147 m/s², 3 times each in X, Y, and Z directions
Applicable Standards: cULus: Listed UL508, ANSI/ISA 12.12.01, EU: EN 61131-2, KC Registration
EtherNet/IP Communication Technology
The NX-EIC202 utilizes EtherNet/IP, a high-performance industrial Ethernet protocol that combines the standard TCP/IP protocol suite with the Common Industrial Protocol. This technology enables real-time control and information data exchange between industrial devices over standard Ethernet networks. The coupler unit supports both implicit (real-time I/O) and explicit (message-based) communication services, providing flexibility for various application requirements. The 100 Mbps link speed ensures rapid data transfer, while the 4 to 1,000 ms RPI range allows users to balance network load against real-time requirements.
NX-Series I/O System Integration
The NX-EIC202 serves as the interface between the EtherNet/IP network and the NX-series I/O units. The coupler unit mounts at the left end of an NX I/O assembly, with additional NX units connected to its right side via the internal NX bus. The coupler provides power to the connected I/O units and manages data exchange between the EtherNet/IP scanner and the I/O modules. The NX-series I/O system includes a wide range of modules including digital inputs and outputs, analog inputs and outputs, temperature inputs, and specialized function modules. The modular design allows users to configure remote I/O stations with exactly the I/O types and quantities required for each application.
High Channel Capacity
The NX-EIC202 can connect up to 63 NX-series I/O units, providing substantial I/O capacity for distributed automation applications. Each NX unit can provide multiple I/O points, so the total I/O count for a single coupler can be significant. The maximum NX output data size is 490 bytes, and the maximum NX input data size is 496 bytes, supporting the data requirements of complex I/O configurations. The NX Unit power supply capacity of 10 W supports the power requirements of the connected I/O units, with higher current applications requiring additional power supply modules.
Network Topologies and Installation
The NX-EIC202 supports multiple network topologies including line, tree, and star configurations, providing flexibility for system design. The coupler unit includes an integrated layer 2 Ethernet switch, simplifying network wiring and enabling daisy-chain connections without requiring external switches. Category 5 or higher shielded twisted-pair cable with double shielding is recommended for reliable communication in industrial environments. The transmission distance between nodes is 100 m or less, allowing distributed I/O stations to be placed throughout a facility.
Environmental Robustness
The NX-EIC202 is designed for reliable operation in industrial environments. The wide operating temperature range of 0°C to 55°C and storage temperature range of -25°C to 70°C accommodate installation in unheated control cabinets. The coupler unit meets IEC 61000-4-4 noise immunity standards with 2 kV on power supply lines, ensuring reliable operation in electrically noisy environments. The vibration and shock resistance specifications conform to IEC 60068-2-6 and IEC 60068-2-27, providing robustness against mechanical stress common in manufacturing facilities.
Configuration with Sysmac Studio
The NX-EIC202 is configured using Omron's Sysmac Studio automation software, which provides a unified development environment for NJ/NX-series controllers and NX-series I/O. The software automatically discovers connected couplers and I/O units, simplifying system setup and reducing configuration errors. I/O addresses are assigned automatically based on the physical configuration, with user-friendly naming options for intuitive programming. The Sysmac Studio interface provides diagnostic displays for monitoring coupler status, communication health, and I/O unit operation, streamlining system maintenance and troubleshooting.
Industrial Applications
The NX-EIC202 EtherNet/IP Coupler Unit is deployed across a wide range of machine automation applications requiring distributed I/O. In packaging machinery, it provides I/O for sealing, filling, and labeling operations distributed across a production line. In assembly machines, it connects sensors and actuators for part handling and quality verification. In material handling systems, it provides I/O for conveyors, diverters, and sortation equipment. The coupler's EtherNet/IP support makes it suitable for integration into industrial automation networks alongside drives, HMIs, and other EtherNet/IP devices.
Conclusion
The Omron NX-EIC202 EtherNet/IP Coupler Unit provides high-speed distributed I/O for NX-series systems with connection for up to 63 I/O units and 100 Mbps EtherNet/IP communication. Its environmental robustness and integration with Sysmac Studio make it a versatile solution for machine automation applications requiring distributed I/O and real-time industrial Ethernet communication.
