The Omron NX-ECC201, also cataloged as the NX-ECC201 EtherCAT Coupler Unit, operates as a dedicated hardware component for fieldbus data bridging and internal bus communication within EtherCAT network platforms.

Model Designation Architecture

• NX: Modular slice I/O system platform identifier.
• EC: Communication unit classification (EtherCAT interface).
• C: Bus coupler functional type.
• 201: Standard performance revision with 10 W internal bus power capacity and 34-byte I/O data mapping size.

Technical Performance & Module Parameters

Network Synchronization & Deterministic Backplane Execution

The bus coupler processes incoming EtherCAT frames to drive connected slice I/O modules with deterministic synchronization. High backplane bus communication velocity guarantees real-time cycle times across attached local I/O nodes. Flash firmware compatibility inside the coupler maintains consistent protocol execution, allowing flexible I/O density scaling without introducing backplane latency or data mapping mismatches.

Package Component List

• 1 x Omron NX-ECC201 EtherCAT Coupler Unit
• 2 x EtherCAT RJ45 Connector Covers
• 1 x End Cover Unit
• 1 x Installation Sheet

Mounting & Power Wiring Procedures

• DIN Rail Assembly: Hook the upper latch of the coupler onto a standard 35 mm DIN rail, press the module backward until the locking mechanism engages, and slide the end cover against the rightmost slice.
• Unit Power Connection: Connect a 24 VDC external power supply to the unit power terminals using AWG 24 to AWG 16 conductors to drive the internal NX bus power rail up to 10 W max.
• I/O Power Connection: Wire a separate 5 to 24 VDC power feed to the I/O supply terminals, verifying total connected field current does not exceed the maximum 4 A rating.
• EtherCAT Cabling: Insert Category 5e or higher shielded twisted-pair (STP) Ethernet cables into the RJ45 IN and OUT ports, securing the shield through functional earth connections.

Operational & Diagnostic FAQ

• What happens if total slice module power exceeds the 10 W internal bus limit?

  An additional NX-PF power feed unit must be inserted into the slice rack to extend backplane logic power capacity.

• Does the coupler support module hot-swapping on an active EtherCAT network?

  No, replacing or disconnecting slice units requires shutting off power to the bus coupler segment to prevent internal backplane communication errors.

• What maximum field current can be passed through the I/O power supply terminals?

  The integrated I/O power bus terminals handle a maximum continuous current load of 4 A across all downstream modules.

• How are network speed and node addresses configured on the unit?

  Node addresses are assigned via hardware rotary switches on the front panel, while communication speed is fixed at 100 Mbps full duplex per EtherCAT specifications.

• How does the coupler indicate EtherCAT communication status?

  Front panel LED indicators (L/A IN, L/A OUT, RUN, and ERR) signal physical link state, network operational status, and packet transmission errors.

• What is the input/output data memory size allocated by the coupler?

  The unit allocates an I/O data size of 34 bytes for input data and 0 bytes for output data, supporting up to 2 input mapping entries.

• What wire conductor size is recommended for the terminal block connections?

  Solid or stranded copper conductors ranging from AWG 24 to AWG 16 with crimped ferrules should be used for push-in terminal connections.

• Is galvanic isolation provided between the EtherCAT network and internal logic circuits?

  Yes, internal optical isolation isolates the fieldbus RJ45 communication ports from the internal NX backplane power and logic circuits.