Omron NJ501-1320 Machine Automation Controller

The Omron NJ501-1320 is a CPU unit from the NJ series of machine automation controllers, combining logic, motion, and vision processing into a single platform. It is engineered for high-speed precision control in packaging, printing, and semiconductor manufacturing equipment.

Processing Capabilities

Equipped with an Intel Atom processor running at 1.1 GHz, the NJ501-1320 executes sequential logic in less than 1 nanosecond per instruction (basic Boolean). Program capacity is 20 MB for user applications, with 64 MB of retained memory for variables. The controller supports up to 192 axes of synchronized motion control over EtherCAT, with cycle times as low as 500 microseconds.

Communication Interfaces

Built-in ports include: EtherCAT master (2 ports, daisy-chain capable), EtherNet/IP (1 port, 100 Mbps), USB 2.0 (Type A for programming), and an SD card slot (supports up to 32 GB for data logging and recipe storage). The EtherNet/IP port supports tag data links with up to 256 connections and allows CIP motion extensions.

Programming Environment

Programming is performed with Omron Sysmac Studio, compliant with IEC 61131-3 languages: Ladder Diagram (LD), Structured Text (ST), Sequential Function Chart (SFC), and Function Block Diagram (FBD). The NJ501-1320 also supports motion control programming per PLCopen standard, including cam tables and electronic gearing. Online debugging, trace functions, and simulation without hardware are standard.

Integrated Safety and Redundancy

While the CPU itself does not include safety logic, it can manage CIP Safety over EtherCAT when paired with Omron NX-series safety I/O. For high-availability systems, the NJ501-1320 supports controller redundancy via EtherNet/IP with automatic failover (requires additional hardware). Error logs are stored non-volatile and can be exported via FTP.

Environmental and Mounting

Operating temperature: 0°C to 55°C, humidity 10–90% non-condensing. The unit measures 90 mm wide, 90 mm high, and 75 mm deep, weighing 350 g. Mounting on a DIN rail requires 75 mm of clearance for airflow. Power consumption is 4.5 W from the backplane (5 VDC) plus up to 6 W for USB and SD card.

Typical System Architecture

A common configuration includes the NJ501-1320 as the central controller, connected to Omron G5-series servos via EtherCAT, NX-series remote I/O, and an NS-series HMI via EtherNet/IP. The controller can handle up to 256 local I/O points plus 8000 remote points through bus couplers.

Conclusion

The Omron NJ501-1320 delivers the real-time performance required for advanced automation tasks. Its integrated architecture reduces programming effort while maximizing synchronization accuracy, making it suitable for both standalone machines and interconnected production lines.