Omron NJ501-R400 Robot Integrated CPU Unit

Technical Overview

Robot integrated CPU unit for OMRON NJ-series machine automation, combining logic, motion, robotics, and kinematics in a single controller. Manufacturer documentation identifies this model as the 32-axis / 8-robot variant of the NJ501-R series, with EtherCAT Master, EtherNet/IP, and USB communication. It is positioned for integrated robot control and machine automation applications where coordinated motion and robot handling are executed by one CPU.

Key Features

Robotic integrated controller for logic, motion, robotics, and kinematics
Supports up to 8 controlled robots
Supports up to 32 synchronous motion axes
20 MB program memory
6 MB variables memory
EtherCAT Master and EtherNet/IP communication
USB communication port
CJ I/O Bus architecture
Up to 192 remote I/O nodes
Up to 40 expansion units

Technical Specification Matrix

Parameter	Value
Controller functionality	Motion control, Robotics, Sequence control
Max. number of robots	8
Max. number of synchronous axes	32
Max. number of axes (incl. virtual)	32
Primary task cycle time	0.5 ms
Program memory	20 MB
Variables memory	6 MB
Communication port(s)	EtherCAT Master, EtherNet/IP, USB
Communication option(s)	CAN, CompoNet Master, DeviceNet Master, DeviceNet Slave, EtherCAT Slave, MODBUS Master, MODBUS Slave, PROFIBUS DP Master, PROFIBUS DP Slave, PROFINET Master, Serial RS-232C, Serial RS-422, Serial RS-485
Max. number of remote I/O nodes	192
I/O system	CJ I/O Bus
Max. number of expansion units	40
I/O capacity / maximum configuration units	2,560 points / 40 units (3 expansion racks)
Product weight (unpacked)	675.494 g

Industrial Applications

1. High-speed robotic pick-and-place cell

The 32-axis motion capacity and 8-robot support make it suitable for synchronized pick-and-place lines with multiple coordinated robots and servo axes.

Problem Solved

Eliminates multi-controller synchronization issues in multi-robot handling cells.

32 axes8 robotssynchronous motionEtherCAT MasterEtherNet/IP

2. Integrated packaging machine with coordinated motion

A single CPU can coordinate sequence control and motion across multiple machine axes, reducing controller count in packaging systems with cams, conveyors, and robot loading.

Problem Solved

Reduces cabinet complexity and timing drift between machine subsystems.

sequence controlmotion controlCJ I/O Bus20 MB program memory0.5 ms cycle time

3. Robot-centered assembly automation line

The controller is well matched to assembly stations where robots, conveyors, and discrete I/O must be orchestrated through one platform with expandable remote I/O.

Problem Solved

Simplifies integration of robot kinematics, field I/O, and plant networking.

roboticsremote I/O nodesexpansion unitsEtherCATCJ I/O Bus