Omron NX-AD4204 NX Series 8-Channel Current Input Unit 4-20mA 1/8000

Omron NX‑AD4204 is an 8‑channel analog input unit for the NX series I/O system. It is designed for current loop signal acquisition in industrial automation and process control applications. Each channel accepts 4‑20 mA differential inputs, providing high noise immunity for reliable signal transmission. The unit delivers 1/8000 resolution and 250 µs per channel conversion time. The 12 mm width and screwless push‑in terminal block support high‑density DIN rail mounting.

Applications:

• Process monitoring and control with 4‑20 mA transmitters

• Pressure, flow, level and temperature measurement

• Factory automation and machine control systems

• Data acquisition in packaging and material handling equipment

Technical Specifications:

Core Specifications

• Number of inputs: 8 analog current inputs (differential)

• Input signal: 4‑20 mA

• Input circuit type: Differential (improved noise immunity for stable signal acquisition)

• Resolution: 1/8000 (13 bits)

• Conversion time per channel: 250 µs (2 ms for all 8 channels)

• Accuracy at 25 °C: ±0.2% of full scale

• Overall accuracy (0 °C to 55 °C): ±0.5% of full scale

Physical & Environmental Specifications

• Input impedance: 85 Ω (current mode)

• NX Unit power consumption: 1.05 W max.

• I/O connection type: Screwless push‑in terminal block (removable)

• Protection rating: IP20

• Dimensions (W × H × D): 12 mm × 104.5 mm × 80.1 mm

• Weight: approx. 70 g

• Operating temperature: 0 °C … 55 °C

• Storage temperature: –25 °C … 70 °C

• Operating humidity: 10% … 95% (non‑condensing)

Advanced Specifications

• I/O refreshing: Free‑run refreshing or synchronous I/O refreshing with NX1P2 CPU Unit or EtherCAT Coupler Unit

• Moving average function (configurable number of samples)

• Input disconnection detection

• Over range and under range detection

• User calibration support

System Integration:

• This analog input unit belongs to the Omron NX series I/O system.

• Connects to other NX I/O units and EtherCAT Coupler Units via the high‑speed NX bus.

• Differential inputs for high‑noise immunity.

• Compatible with NX series communication coupler units (EtherCAT or EtherNet/IP).

• Configuration and parameter setting performed using Sysmac Studio automation software.

Related Products:

• NX‑ECC203 – EtherCAT Coupler Unit for NX I/O system (2 ports, 125 µs cycle time, 63 I/O units)

• NX‑EIC202 – EtherNet/IP Coupler Unit for NX I/O system (2 ports, 63 I/O units, local safety support)

• 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‑TBA162 – Spare terminal block for NX series units with push‑in connectors