The Omron NX102-1120, also cataloged as the NX102-1120 Sysmac NX1 Modular CPU, operates as a dedicated hardware component for real-time motion control and database connectivity within Sysmac automation architectures. The controller executes sequence and motion tasks on a 1 ms primary task cycle, managing up to 4 synchronous axes and up to 15 total axes (including virtual). Featuring 5 MB program memory, 33.5 MB variables memory, and onboard OPC-UA and EtherCAT Master interfaces, it coordinates data transfer across local NX I/O expansion racks and up to 64 remote I/O nodes.

Identification & Architecture Nomenclature

• NX102: Sysmac compact controller series with dual EtherNet/IP and database functionality.
• 1120: Performance tier specifying 4-axis motion control and integrated OPC-UA server capability.

Performance & System Parameters

Bus Communication Velocity & Local Scaling

The CPU coordinates real-time motion profiles across EtherCAT fieldbus topologies while maintaining deterministic communications over EtherNet/IP trunklines. High backplane bus communication velocity allows seamless internal data transfer to local expansion modules without compromising 1 ms cycle timing. Scalable I/O density scaling supports up to 32 slice modules per rack, while non-volatile memory maintains firmware flash compatibility across all connected bus nodes.

Scope of Delivery

• 1 x Omron NX102-1120 Modular CPU Unit
• 1 x Bus End Cover
• 1 x Installation Manual

Wiring & Physical Mounting Directives

• DIN Rail Assembly: Hook the upper latch of the unit onto a standard 35 mm DIN rail and push firmly until the lower locking tab engages.
• NX Bus Expansion: Slide local NX I/O slice modules laterally into side connectors until the locking mechanisms click into position.
• Shielding & Grounding: Wire the functional ground terminal to the main panel ground bar using a short, low-impedance copper conductor.
• EtherCAT Network Cabling: Connect double-shielded Category 5e STP cables to the EtherCAT master port to prevent electromagnetic interference.
• Bus Termination: Install the included bus end cover on the rightmost NX I/O module to complete the internal backplane logic circuit.

Technical Knowledge Base

• Does the NX102-1120 CPU support live hot-swapping of local NX I/O slice modules?

  No. Main power to the CPU unit and I/O bus must be turned off before replacing local slice modules to prevent module damage.

• What limits apply to the maximum number of synchronous motion axes?

  The controller supports a maximum of 4 synchronous motion axes and 4 PTP axes within its 15 total axis memory limit.

• How are database connectivity features handled during network disconnects?

  Spooling memory buffers hold SQL transactions internally in variables memory until network communication to the server resumes.

• What cable specification is required for the integrated EtherCAT Master port?

  Use Category 5e or higher aluminum tape and braided double-shielded twisted-pair (STP) Ethernet cables with shielded RJ45 connectors.

• Does the NX bus require a physical termination component at the end of the rack?

  Yes. The provided bus end cover must be attached to the right edge of the last NX I/O module for the backplane to function.

• How is firmware flash compatibility verified across connected field devices?

  Firmware compatibility is managed via Sysmac Studio, which checks CPU and remote node revision levels prior to code deployment.

• What is the maximum number of local expansion modules supported on the CPU backplane?

  The CPU backplane supports up to 32 local NX I/O expansion units connected directly alongside the main processor module.

• What communication protocols run concurrently over the onboard Ethernet ports?

  The onboard ports run OPC-UA server communications, EtherNet/IP explicit/implicit messaging, and standard TCP/IP sockets simultaneously.