Configured for high-speed motion execution and sequence processing in industrial automation systems, the Omron NJ301-1100 (NJ301 CPU Processor) provides direct physical/electrical execution. This controller executes deterministic task loops with a 0.5 ms primary cycle time while managing up to 15 motion axes over EtherCAT network topologies.

Model Identification & Hardware Architecture

• NJ: Sysmac NJ Series machine automation controller platform.
• 301: Performance level designation within the mid-range NJ3 processing family.
• 11: Motion control capability supporting up to 4 synchronized axes and 15 total axes.
• 00: Standard hardware specification variant with integrated EtherCAT Master and EtherNet/IP ports.

Physical & Processing Specifications

Deterministic Motion & Deterministic Network Integration

The CPU maintains high backplane bus communication velocity across connected CJ I/O bus expansion racks, supporting efficient I/O density scaling across up to 40 local units. Integrated dual communication interfaces anchor ProFINET / EtherNet/IP deterministic networks to handle real-time motion commands, maintaining firmware flash compatibility during controller maintenance cycle operations.

Standard Delivery Hardware

• 1 x Omron NJ301-1100 CPU Unit
• 1 x CJ Bus End Cover Component

Panel Assembly & Cabling Protocols

Mechanical Mounting

Mount the CPU unit onto a standard 35 mm DIN rail. Secure the right side using the CJ Series bus end cover to protect backplane pin contacts and guarantee proper bus grounding.

Network Communications Cabling

Connect servo drives and remote I/O nodes to the EtherCAT Master port using Category 5e or higher STP cables. Maintain dedicated conduit routing to isolate communication cables from motor supply conductors.

System Grounding Execution

Connect the CPU ground terminal directly to the central panel earth bar using a copper conductor with a cross-section of at least 2 mm sq to mitigate electrical noise interference.

Frequently Asked Questions

• What is the primary execution cycle time of the NJ301-1100 CPU?

  The controller operates with a deterministic primary task cycle time as fast as 0.5 ms for real-time control.

• How many total motion axes can be controlled by this processor?

  The processor manages up to 15 total axes, which includes up to 4 fully synchronized motion axes alongside virtual axes.

• How many remote I/O nodes does the integrated EtherCAT Master handle?

  The integrated EtherCAT Master supports connection and real-time communication for up to 192 remote slave nodes.

• What amount of internal memory is reserved for variables?

  The hardware provides 2.5 MB of dedicated internal memory space reserved for user and system variables.

• What local bus system is used for I/O module expansion?

  Local expansion utilizes the CJ I/O Bus system, supporting up to 40 expansion units connected across local racks.

• What native communication ports are built into the CPU front panel?

  The front panel includes one EtherCAT Master port, one EtherNet/IP port, and one peripheral USB programming port.

• Is hot-swapping of expansion modules supported on the local CJ bus?

  No, power to the controller and expansion racks must be shut off before adding or replacing CJ I/O units.

• What optional communication protocols can be integrated via option cards?

  Supported options include PROFIBUS DP, PROFINET, DeviceNet, CAN, CompoNet, MODBUS, and RS-232C/422/485 serial communication.