Omron NX-TC3406 NX Series 4‑Channel Temperature Control Unit

Omron NX‑TC3406 is a 4‑channel temperature control unit for the NX series I/O system. Each channel provides isolated universal input (thermocouple or Pt100/Pt1000 RTD), one voltage output for driving an external SSR, and heater burnout detection via an external CT input. Supports heat‑only or heating/cooling control with standard PID and adaptive control algorithms. Free‑run I/O refreshing. 24 VDC unit power supply, 50 ms conversion time per unit. 24 mm wide, screwless push‑in terminal block, DIN rail mounting.

Applications:

• Multi‑zone temperature control in injection molding and extrusion machines

• Packaging machinery (sealing bars, heat tunnels)

• Industrial ovens, furnaces and drying equipment

• Semiconductor and electronics manufacturing thermal processes

Core Specifications:

• Number of control loops: 4

• Input types: Thermocouple (B, C, E, J, K, L, N, P, R, S, T, U), RTD (Pt100, JPt100, Pt1000)

• Input impedance: Thermocouple: ≥ 1 MΩ; RTD: 2.8 kΩ (3‑wire)

• Output type: Voltage output for driving external SSR (PNP, 24 VDC, 21 mA per channel)

• Output function: PWM control with adjustable cycle time

• Control types: Standard PID control (heat‑only), Heating/cooling control (heat + cool)

• Adaptive control: Automatic filter adjustment, water‑cooling output adjustment

• Heater burnout detection: Supported (requires external NX‑HB3201 CT input unit)

• Conversion time: 50 ms per unit (all 4 channels)

• I/O refreshing: Free‑run refreshing

Technical Specifications:

• Unit power supply voltage: 24 VDC (permitted range 20.4 … 28.8 VDC)

• NX Unit power consumption: 0.95 W max.

• I/O power supply: Not required

• External connection: Screwless push‑in terminal block (removable)

• Number of I/O connectors: 2

• Indicators: 1 × TS (Unit status), 4 × output status, 4 × CT input status

• Isolation method: Photocoupler isolation between temperature inputs, outputs and NX bus

• Protection rating: IP20

• Mounting: DIN rail (35 mm)

• Dimensions (W × H × D): 24 mm × 100 mm × 80 mm

• Weight: 140 g

• Operating temperature: 0 °C … 55 °C

• Storage temperature: –20 °C … 75 °C

• Operating humidity: 10 % … 90 % (non‑condensing)

• Certifications: CE, cULus, NK, Lloyd, KC, RCM, RoHS

Compatibility information:

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

• Compatible with NX series EtherCAT Coupler Units (NX‑ECC20×) and EtherNet/IP Coupler Units (NX‑EIC202).

• Up to 63 NX I/O units can be connected to a single coupler.

• Programming and configuration performed using Sysmac Studio automation software.

• Heater burnout detection requires an external CT input unit (NX‑HB3201) – not included.

Related Products:

• Entry level (standard control) → NX‑TC2405 (2 channels, voltage output, heat‑only)

• Current model → NX‑TC3406 (4 channels, voltage output, heating/cooling control)

• Higher density heating/cooling → NX‑TC3407 (4 channels, 2 voltage outputs per channel, 8 output points total)

• Current output variant → NX‑TC3408 (4 channels, linear current output for analog valve control)

• Heater burnout CT input unit → NX‑HB3201 (4 CT inputs, 4 PNP outputs)