OMRON CK3M Series Modules CK3M-CPU120

Technical Dossier

Product Details And Specifications

OMRON CK3M Series Technical Notes

The Evolution of CK3M Architecture

The CK3M series was introduced as OMRON's response to the convergence of motion control and machine automation on a single deterministic network. Early deployments relied on the CK3M-CPU121 and CK3M-CPU120 as the primary processing nodes, paired with dedicated EtherCAT slave infrastructure. The architecture uses a real-time OS kernel with a minimum motion task cycle of 125 µs, distinguishing it from general-purpose PLC platforms such as the NJ/NX series, which prioritize logic throughput over motion determinism.

As the series matured, OMRON expanded the peripheral ecosystem to include analog I/O expansion units (CK3W-AX), digital I/O units (CK3W-DI, CK3W-DO), and encoder interface modules (CK3W-EIC). Compatibility between CK3M CPU generations and CK3W expansion units is governed by firmware revision tables published in OMRON's Cat. No. O031. Integrators migrating from earlier OMRON motion platforms (e.g., the MC Series or R88D servo systems without EtherCAT) must account for EtherCAT topology constraints and axis object mapping differences. The CK3M platform is currently in its active production phase, with long-term support commitments from OMRON through at least 2030 per published product lifecycle documentation.

CK3M Full Catalog & Functionalities (SKU List)

CPU / Controller Modules

• CK3M-CPU120: Standard motion CPU, up to 16 axes, 125 µs cycle, EtherCAT master
• CK3M-CPU121: High-performance motion CPU, up to 64 axes, 125 µs cycle, dual EtherCAT ports
• CK3M-CPU110: Entry-level motion CPU, up to 4 axes, 500 µs minimum cycle time
• CK3M-CPU111: Mid-range CPU, up to 8 axes, integrated USB and Ethernet ports

Analog I/O Expansion Units (CK3W-AX Series)

• CK3W-AX1616C: 16-ch analog input / 16-ch analog output, ±10 V / 4–20 mA
• CK3W-AX0808C: 8-ch analog input / 8-ch analog output, 16-bit resolution
• CK3W-AX1600C: 16-ch analog input only, high-speed sampling for process feedback
• CK3W-AX0016C: 16-ch analog output only, voltage/current selectable per channel

Digital I/O Expansion Units

• CK3W-DI16C: 16-point digital input unit, 24 VDC, sink/source compatible
• CK3W-DO16C: 16-point digital output unit, 24 VDC, transistor output
• CK3W-DIO1616C: 16-point DI / 16-point DO combination unit, compact form factor

Encoder Interface Modules

• CK3W-EIC01: 2-axis encoder input unit, incremental/absolute encoder support, SSI compatible
• CK3W-EIC02: 4-axis encoder input unit, high-resolution position feedback aggregation

Power Supply & System Units

• CK3W-PD048: 48 VDC power supply unit for CK3W expansion bus
• CK3W-PD024: 24 VDC power supply unit, DIN-rail mount, 10 A rated output
• CK3M-BC001: Backplane / base unit for CK3M CPU and CK3W expansion modules

Quality Control for the CK3M Range

CK3M modules undergo a structured incoming inspection and functional verification protocol at DriveKNMS before dispatch. The CK3M CPU units (CK3M-CPU120, CK3M-CPU121) are bench-tested using OMRON Sysmac Studio with a live EtherCAT slave simulator to verify axis object initialization, motion task scheduling, and communication port integrity. Firmware version is recorded and matched against the customer's existing system revision to prevent incompatibility on installation.