The Original New Omron NX-EC0222 is a 2-channel incremental encoder input unit for the NX series I/O system, designed for high-speed position and speed feedback in motion control and precision automation applications. It accepts PNP encoder signals with a maximum single-phase input frequency of 500 kHz (phase differential x4: 125 kHz) and a Phase Z reference pulse frequency of 125 kHz. The unit supports Free-Run, Synchronous, and Task period prioritized refreshing methods, ensuring flexible integration with various control architectures. The 12 mm slim form factor and screwless push-in terminal block enable high-density panel mounting and tool‑free wiring. Part of the NX series for EtherCAT communication coupler systems. Core Engineering Highlights:2 incremental encoder input channels (PNP) | 500 kHz max single-phase input frequency | Phase differential pulse input x4: 125 kHz | Phase Z reference pulse: 125 kHz | Free-Run, Synchronous, Task period prioritized refreshing | 32-bit counter range: -2,147,483,648 to 2,147,483,647 pulses | Ring or linear counter modes| Pulse rate and period measurement| Screwless push-in terminal block | 12 mm width | IP20 protection | 0°C to +55°C operating temperature Key Features: Original New Omron NX-EC0222 unit 2 encoder input channels for PNP incremental encoders (24 V DC) Max. single-phase input frequency: 500 kHz Phase differential pulse input x4: 125 kHz Phase Z reference pulse: 125 kHz Counter range: -2,147,483,648 to 2,147,483,647 pulses Counter modes: Ring counter or linear counter Counter controls: Gate control, counter reset, counter preset Latch function: 2 external input latches and 1 internal latch Measurements: Pulse rate measurement and pulse period measurement Pulse input methods: Phase differential pulse (multiplication x2/4), pulse + direction inputs, up/down pulse inputs Signal processing: Free-Run, Synchronous, or Task period prioritized refreshing Screwless push-in terminal block (12 terminals) for tool‑free wiring 12 mm slim design for high-density panel mounting Detachable I/O connector for easy maintenance Photocoupler isolation for reliable signal integrity 100 g lightweight design DIN rail mounting for space-efficient installation IP20 protection for control cabinet environments Applications: High-speed position feedback for servo and stepper motor control Speed and distance measurement in conveyor systems Positioning control in packaging and material handling equipment Motion control in CNC machines and robotics High-precision counting and measurement applications Factory automation and machine control systems Distributed I/O architectures with NX series EtherCAT couplers Technical Specifications: Attribute Specification Catalog Number NX-EC0222 I/O System NX I/O Bus Type of Module Encoder input Number of Encoder Input Channels 2 Digital Input Type Incremental encoder, PNP Max. Encoder Input Frequency 500 kHz Phase Z Input Frequency 125 kHz Number of Pulse Output Channels 0 Signal Processing Free running, Synchronous, Task period prioritized I/O Connection Type Push-in (screwless) Number of I/O Connectors 1 Detachable I/O Terminal Block Yes I/O Refreshing Method Free-Run refreshing, synchronous I/O refreshing, or task period prioritized refreshing Input Signals Counter: Phases A, B, and Z; External Inputs: None Input Form Voltage input (24 V) Input Voltage 20.4–28.8 V DC (24 V DC +20%, -15%) ON Voltage / ON Current 19.6 V DC min. / 3 mA min. Input Current 4.2 mA typical (24 V DC) OFF Voltage / OFF Current 4.0 V DC max. / 1 mA max. Counting Unit Pulses Counter Range -2,147,483,648 to 2,147,483,647 pulses Counter Type Ring counter or linear counter Counter Controls Gate control, counter reset, and counter preset Latch Function Two external input latches and one internal latch Measurements Pulse rate measurement and pulse period measurement Internal I/O Common PNP Isolation Method Photocoupler isolation Insulation Resistance 20 MΩ min. between isolated circuits (at 100 V DC) Dielectric Strength 510 V AC for 1 min (leakage current 5 mA max.) Number of IOV (V+) Terminals 2 Number of IOG (V-) Terminals 2 IO-Link Master No Suitable for Safety Functions No SIL (IEC 61508) None Width 12 mm Height 104.5 mm Depth 80.1 mm Weight Approx. 100 g Mounting DIN Rail Protection Rating IP20 Operating Temperature 0°C to 55°C Storage Temperature –25°C to 70°C Certifications CE, UL, CSA, CCC, NK, DNV, BV, LR RoHS Status EU RoHS compliant Country of Origin Japan System Compatibility: Compatible with Omron NX series EtherCAT Coupler Units (NX-ECC20×) Compatible with NX series EtherNet/IP Coupler Units (NX-EIC202) Compatible with NX series CPU Units (NX1P2, NX102, etc.) Supports incremental encoders with PNP (sourcing) outputs Mounts on 35 mm DIN rail Programming and configuration with Sysmac Studio automation software Related Products: NX-ECC203 – NX series EtherCAT Coupler Unit, 2 ports, 125 µs cycle time NX-EIC202 – NX series EtherNet/IP Coupler Unit, 2 ports, local safety support NX-EC0112 – 1-channel incremental encoder input unit (NPN) NX-EC0122 – 1-channel incremental encoder input unit (PNP) NX-EC0212 – 2-channel incremental encoder input unit (NPN) NX-EC0222 – 2-channel incremental encoder input unit (PNP, current model) NX-PF0630 – Additional I/O power supply unit, 4 A, 5-24 V DC NX-PF0730 – Additional I/O power supply unit, 10 A, 5-24 V DC NX-PD1000 – Additional NX unit power supply, 24 V DC, 10 W NX-TBA122 – Replacement screwless push-in connector with 12 wiring terminals (marked A+B) NX-AUX02 – Terminal block coding pins for 10x NX I/O units PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Omron is a trademark of Omron Corporation.
