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Part of the Omron NX-Series Safety & I/O series — see the full model table, lifecycle status and replacement parts.

Omron NX-TC3406 — front face of the NX-series 4-loop temperature control unit showing the 24 mm wide housing with the green TS indicator on the upper left, two 16-pin screwless push-in terminal blocks side by side with the channel A/B/C/D markings, the OUT LEDs for each of the four loops and the NX-TC3405 model label on the lower right

Omron NX-TC3406 — 4-Loop Temperature Controller

SKU: NX-TC3406

USD 120.00

NX-series 4-loop temperature controller, thermocouple and Pt100 input, PNP SSR-drive output. In stock, China shipping.

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Product Overview

The Omron NX-TC3406 is the NX-series 4-loop temperature control unit It is manufactured by Omron Corporation. Hengyixin Automation stocks this controller in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports. It accepts 4 inputs from thermocouple K, J, T, E, L, U, N, R, S, B, C/W or PLII types, or from Pt100, JPt100 or Pt1000 RTDs on 3-wire. Each loop runs a voltage control output (for SSR drive) on a PNP common at 21 mA per point and 84 mA per unit, with load short-circuit protection. NX Unit power is 1.70 W max on a CPU, 1.25 W max on a Communications Coupler. Key specs: Number of Loops 4 control loops; 1 temperature input per loop, 1 control output per loop; Input Sensors Thermocouple K, J, T, E, L, U, N, R, S, B, C/W, PLII; Pt100 (3-wire), JPt100 (3-wire), Pt1000 (3-wire); Resolution / Accuracy 0.1 C max resolution; input conversion range +/-20 C of input range; cold junction compensation error +/-1.2 C; Control Output Voltage output for SSR drive, 1 point per loop, PNP common; 21 mA per point, 84 mA per.

Key Features

  • NX-series 4-loop temperature control unit with one input and one SSR-drive output per loop
  • Thermocouple K, J, T, E, L, U, N, R, S, B, C/W, PLII and Pt100, JPt100, Pt1000 RTD inputs
  • PNP voltage output (SSR drive) at 21 mA per point, 84 mA per unit, load short-circuit protection
  • 50 ms conversion time per unit, 0.1 C resolution, control period 0.1 to 99 s, Heat or Cool
  • SKU: NX-TC3406
  • Series: NX-series machine automation I/O, temperature control family (NX-TC)

Best-Fit Applications

  • Injection-molding barrel zone control where the NX-TC3406 reads 4 thermocouples and drives 4 SSRs at 50 ms per loop and 1 s control period
  • Multi-zone oven control on a packaging sealer where the NX-TC3406 holds 4 Pt100 RTDs at setpoint and outputs SSR drive pulses to 4 heaters
  • Spare replacement on a legacy E5CC panel where the NX-TC3406 adds EtherCAT visibility to 4 temperature loops on a Sysmac NJ501 without field wiring changes

Buying Checklist

  • Pick the NX-TC3406 for 4 loops of temperature control with TC or RTD sensors and PNP SSR-drive outputs on the 24 mm wide NX body.
  • Pick the NX-TC3405 instead when the same 4 loops need CT inputs for heater burnout detection (NX-TC3405 has the CT inputs and the NX-TC3406 does not).
  • Pick the NX-TS3201 instead when the panel only needs 4 RTD temperature inputs without closed-loop control (read-only, no control outputs).

Technical Specifications

Manufacturer Omron Corporation (Japan)
Series NX-series machine automation I/O, temperature control family (NX-TC)
Model / SKU NX-TC3406
Number of Loops 4 control loops; 1 temperature input per loop, 1 control output per loop
Input Sensors Thermocouple K, J, T, E, L, U, N, R, S, B, C/W, PLII; Pt100 (3-wire), JPt100 (3-wire), Pt1000 (3-wire)
Resolution / Accuracy 0.1 C max resolution; input conversion range +/-20 C of input range; cold junction compensation error +/-1.2 C
Control Output Voltage output for SSR drive, 1 point per loop, PNP common; 21 mA per point, 84 mA per unit; max inrush 0.3 A/point for 10 ms; load short-circuit protection
Control Performance Control period 0.1, 0.2, 0.5, 1 to 99 s; manipulated variable -5 to +105 percent; conversion time 50 ms per unit
Control Function Heat or Cool (standard control); Free-Run I/O refresh; no heater burnout detection (add NX-HB3201)
Power NX Unit power 1.70 W max on CPU, 1.25 W max on Communications Coupler Unit; I/O supply current 20 mA max
Isolation Transformer (power) and digital isolator (signal) between sensor input and internal circuit and between sensor inputs; photocoupler between control output and internal circuit; non-insulated between control outputs
Environment / Wiring 0 to 55 C operating; 24 (W) x 100 (H) x 71 (D) mm; 140 g; 2 x 16-position screwless push-in terminal block; IP20; warm-up 30 minutes

Manufacturer documentation

Omron's own product page, where the manufacturer's current specification and lifecycle information are published. We are an independent distributor and cannot mirror those documents; the link goes to Omron's site.

FAQ for NX-TC3406

What is the Omron NX-TC3406 used for?
It is the NX-series 4-loop temperature control unit. Each of the four loops reads a thermocouple or Pt100/JPt100/Pt1000 RTD sensor and outputs a PNP voltage pulse for SSR drive. Typical uses are injection-molding barrel zones, multi-zone oven sealers, and any Sysmac NJ/NX panel where four loops of closed-loop temperature control need to live on a single 24 mm wide slice.
NX-TC3406 vs NX-TC3405 - what is the difference?
Both are NX-series 4-loop temperature control units with the same footprint, conversion time, and PNP voltage outputs. The NX-TC3405 includes 4 CT inputs for heater burnout detection; the NX-TC3406 does not. Pick the -3405 when each heating element needs current monitoring for heater failure detection; pick the -3406 when the panel only needs temperature control.
What sensors work with the NX-TC3406?
Thermocouples K, J, T, E, L, U, N, R, S, B, C/W and PLII on the thermocouple side; Pt100, JPt100 and Pt1000 on 3-wire RTD. Input impedance is 20 kOhm min and absolute maximum rating is +/-130 mV. Input conversion range is +/-20 C of the input range. Resolution is 0.1 C max. Cold junction compensation error is +/-1.2 C.
Can the NX-TC3406 do PID and ON/OFF control?
Yes. The control function is Heat or Cool with selectable control period from 0.1, 0.2, 0.5 and 1 to 99 s. PID autotuning is supported in Sysmac Studio and runs at 50 ms per unit. ON/OFF control is selectable per loop through the control period and manipulated variable -5 to +105 percent configuration.

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