OMRON SYSMAC NX series NX1P2 CPU unit

Core positioning

Product: NX1P2 series integrated machine automation controller

Version: W578-E1-14

Purpose: Integrated sequence control and motion control, small modular, high reliability, EtherCAT/EtherNet/IP dual network native

Applicable: Small equipment, production lines, handling, packaging, machine tools, electronic manufacturing and other automation equipment

Product Overview and Core Features

1. Core positioning

Small integrated controller: CPU+built-in I/O+dual network ports+expansion slots, no additional rack required.

2. Key highlights

Built in EtherCAT master station (up to 16 slaves)

Built in EtherNet/IP (100Mbps)

Built in I/O: 14~40 points, NPN/PNP optional

Scalability: Up to 8 NX modules+1-2 optional boards

Battery free operation: Programs, data retention, and event logs are all stored in non-volatile memory

SD card: backup/restore/automatic program distribution

Compliant with safety concept: External emergency stop, interlock, and safety circuit must be externally installed

3. Model classification (by number of axes and I/O)

NX1P2-1140DT/DT1:12 axis, 40 point I/O (24 in/16 out)

NX1P2-1040DT/DT1:10 axis, 40 point I/O

NX1P2-9024DT/DT1:4 axis, 24 point I/O (14 in/10 out)

NX1P2-9BxxxxDT/DT1:2 axis, simplified version

System architecture

1. Basic components

NX1P2 CPU Unit

NX I/O modules (up to 8)

End cap NX-END02

Optional boards: serial port, analog I/O

SD card

Battery (optional, only for long-term clock maintenance)

2. Network architecture

EtherCAT: Motion, Remote I/O, Servo, Inverter, Vision

EtherNet/IP: upper computer, HMI, PLC interconnection, IT access

Serial port (optional): RS232/485, Modbus RTU, no protocol

3. Software platform

Sysmac Studio: Unified Programming, Configuration, Debugging, and Simulation

Follow IEC 61131-3+PLCopen motion control

Hardware Structure and Interface

1. Front panel components

SD card slot+power switch

DIP switch: safe mode, backup, restore, automatic transfer

Status lights: POWER/RUN/ERROR/BUSY/SD PWR/SD BUSY

Dual Ethernet ports: PORT1=EtherNet/IP, PORT2=EtherCAT

Removable terminal block: power supply, grounding, built-in I/O

Optional board slots (1-2)

battery compartment

2. Terminal definition (emphasis)

Power supply: 24VDC ± 10%

Grounding: Functional grounding (must be connected)

Input: 24V universal, high-speed/normal separated

Output: NPN/PNP transistor, 300mA per point

Public end: segmented and independent to enhance anti-interference capability

3. Optional board

NX1W-CIF01：RS232

NX1W-CIF11/12: RS485 (non isolated/isolated)

NX1W-ADB21:2 analog input

NX1W-DAB21V: 2-channel analog output

NX1W-MAB221:2 input 2 output analog quantity

Power System Design (Core Chapter)

1. Two completely independent power sources

Unit power supply: provides power to the CPU, modules, and circuits

I/O power supply: provides power to input/output, sensors, and loads

Power supply must be separated and not shared to prevent noise interference.

2. Power supply restrictions

CPU provides NX module power supply: maximum 10W

I/O power bus current: maximum 4A

NX power auxiliary unit must be added if exceeded

3. Selection of protective devices

Input terminal circuit breaker/fuse: selected based on impulse current+rated current

The power supply must meet SELV and double insulation requirements

4. Voltage drop calculation

Voltage drop per unit connection: 0.02V~0.08V (by current)

It is necessary to ensure that the terminal load voltage is within the specifications

Installation and wiring specifications

1. Installation environment

Temperature: 0~55 ℃

Dustproof, corrosion-resistant, and vibration resistant

It must be installed vertically to ensure the air duct

Stay away from strong electricity and interference sources ≥ 200mm

2. Installation method

DIN rail installation (35mm)

Cannot be installed sideways/upside down

Module splicing: Yellow slider pushed to the bottom with a “click” lock

3. Key points of wiring

Turn off the power first and then connect the wires

Communication cables with double shielding of Category 5e or above

EtherCAT and power line separation wiring

CT strictly prohibits open circuit

Shielding layer single ended grounding

4. Safety grounding

Functional grounding ≤ 100 Ω

Separate strong grounding from weak grounding

Safety precautions (mandatory requirement)

1. Absolutely prohibited

Touch the terminal when powered on

Power on disassembly module

Reverse connection of power supply and I/O

Connect the output terminal to the power supply

2. The safety circuit must be external

Emergency stop, limit, interlock, and safety door must be implemented in external hardware

Prohibit relying solely on program security

3. Failure safety design

When the CPU fails, loses power, or experiences communication abnormalities, all outputs are safely shut down

Risk of transistor breakdown in output: Hardware relay for ultimate cut-off

Status lights and diagnostics

1. Core Lamp Meaning

POWER green: Power supply is normal

RUN Green: Running

ERROR red: Fault (constantly on=major fault, flashing=minor fault)

BUSY flashing yellow: Reading and writing internal storage

SD light: SD card access in progress

2. Network lights

NET RUN: Network is normal

NET ERR: Network failure

Link/ACT: Link/Data Activity

Backup and Recovery (DIP Switch)

Pin1=ON: Safe Mode (program not running)

Pin2=ON: Backup to SD

Pin3=ON: Restore from SD

Pin4=ON: Automatic transmission upon startup

Modify DIP and power it back on to take effect.

Battery usage

Default without battery

No battery: The clock is held by a capacitor (approximately 10 days/40 ℃)

Long term clock maintenance required: installation of CJ1W-BAT01

Maintenance and upkeep

Regular inspection: Terminal fastening, heat dissipation, dust, cable damage

Fans and capacitors are vulnerable parts

The insulation test must be conducted after disconnecting the power and wiring

SD card cannot be plugged in or unplugged with power on (power off switch must be pressed first)

Principles of fault handling

Viewing lights: POWER/RUN/ERROR

Check power supply: 24V, grounding, wiring

Check network: EtherCAT/EtherNet/IP link

Check I/O: input power supply, output load, short circuit

Clear errors, reset, and power on again

Viewing event logs using Sysmac Studio