Part of the Omron NX-Series Safety & I/O series — see the full model table, lifecycle status and replacement parts.
Omron NX-TS3101 — 4-Ch Thermocouple Input, 0.1°C
SKU: NX-TS3101USD 132.00
Omron NX-TS3101 NX-series 4-channel thermocouple input unit, 0.1 C resolution, 250 ms/unit. In stock, China shipping.
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Product Overview
The Omron NX-TS3101 is the NX-series 4-channel thermocouple temperature input unit, manufactured by Omron Corporation. Hengyixin Automation stocks this controller option board in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.
It reads 4 thermocouple inputs from types K, J, T, E, L, U, N, R, S, B, WRe5-26 or PLII at 0.1 C resolution (0.2 C max for R, S or W) with 250 ms conversion time per unit. Input impedance is 20 kOhm min and absolute maximum rating is +/-130 mV. Input disconnection detection is approx 0.1 uA.
Isolation is transformer (power) and photocoupler (signal) between each input and the NX bus, and the same between channels. The 24 mm wide housing carries two 16-pin screwless push-in terminals and weighs 140 g. NX Unit power is 1.75 W max on a CPU, 1.30 W max on a Communications Coupler. No I/O power is consumed because thermocouple inputs are self-powered. For RTD inputs pick the NX-TS3201.
Key Features
- NX-series 4-channel thermocouple temperature input unit, 0.1 C max resolution (0.2 C for R/S/W)
- K, J, T, E, L, U, N, R, S, B, WRe5-26 and PLII thermocouple types on each channel
- 250 ms conversion time per unit, Free-Run I/O refresh, input impedance 20 kOhm min, +/-130 mV max
- Transformer and photocoupler isolation per channel and to NX bus, 24 mm wide housing, 140 g, two 16-pin screwless push-in terminals
- SKU: NX-TS3101
- Series: NX-series machine automation I/O, temperature input family (NX-TS)
Best-Fit Applications
- Furnace temperature monitoring on a heat-treatment line where the NX-TS3101 reads 4 type-K thermocouples at 250 ms and writes scaled C into an NJ CPU
- Multi-zone thermal profiling on a packaging sealer where the NX-TS3101 reads 4 thermocouples for trending without closed-loop control, leaving timing to the HMI
- Spare replacement on a CJ1W-TS562 retrofit where 4 thermocouple channels migrate onto the NX-TS3101 on an NX-ECC201 EtherCAT coupler without field wiring changes
Buying Checklist
- Pick the NX-TS3101 for 4 thermocouple inputs at 0.1 C resolution and 250 ms per unit on the 24 mm wide NX body.
- Pick the NX-TS3201 instead when the panel reads Pt100 or Pt1000 RTDs on 3-wire and no thermocouple inputs are needed.
- Pick the NX-TS3102 instead when 0.01 C resolution and 10 ms conversion are required for high-speed temperature ramp profiling.
Technical Specifications
| Manufacturer | Omron Corporation (Japan) |
|---|---|
| Series | NX-series machine automation I/O, temperature input family (NX-TS) |
| Model / SKU | NX-TS3101 |
| Number of Inputs | 4 thermocouple inputs, differential |
| Sensor Types | K, J, T, E, L, U, N, R, S, B, WRe5-26, PLII thermocouples |
| Resolution | 0.1 C max (0.2 C max when input type is R, S, or W) |
| Conversion Time | 250 ms per Unit; Free-Run I/O refresh |
| Input Range | Input conversion range +/-20 C of input range; absolute maximum rating +/-130 mV; input impedance 20 kOhm min |
| Detection / Warm-up | Input disconnection detection current approx 0.1 uA; warm-up period 30 minutes; cold junction compensation error +/-1.2 C |
| Power | NX Unit power 1.75 W max on CPU or Communication Control Unit, 1.30 W max on Communications Coupler Unit; no I/O power consumed (thermocouple inputs self-powered) |
| Isolation | Transformer (power) and photocoupler (signal) between input and NX bus and between each input channel |
| Environment / Wiring | 0 to 55 C operating, 10 to 95 percent humidity (no condensation); 24 (W) x 100 (H) x 71 (D) mm; 140 g; 2 x 16-position screwless clamping terminal block; IP20; insulation 20 MOhm min at 100 VDC; dielectric 510 VAC for 1 minute |
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-TS3101
What is the Omron NX-TS3101 used for?
It is the NX-series 4-channel thermocouple temperature input unit with 0.1 C resolution and 250 ms per unit conversion. Typical uses are furnace temperature monitoring, multi-zone thermal profiling on packaging sealers, and any CJ1W-TS562 retrofit that needs to migrate 4 thermocouple channels onto an NX-ECC201 EtherCAT coupler.
NX-TS3101 vs NX-TS3201 - what is the difference?
Both are NX-series 4-channel temperature input units in the same 24 mm wide housing. The NX-TS3101 reads thermocouples (K, J, T, E, L, U, N, R, S, B, WRe5-26, PLII); the NX-TS3201 reads RTDs (Pt100, JPt100, Pt1000 on 3-wire). Pick the -3101 for grounded thermocouple probes; pick the -3201 for Pt100 or Pt1000 RTD elements.
What is the resolution of the NX-TS3101?
0.1 C max for most thermocouple types. For R, S and W (WRe5-26) input types the resolution is 0.2 C max. Cold junction compensation error is +/-1.2 C. Resolution is measured against the rated sensor range; the input conversion range is +/-20 C beyond the nominal input range.
Does the NX-TS3101 need a separate I/O power supply?
No. The NX-TS3101 is a thermocouple input unit and draws no I/O power; the thermocouple inputs are self-powered from the sensor signal. Only the NX Unit power consumption applies: 1.75 W max on a CPU, 1.30 W max on a Communications Coupler Unit.
Can the NX-TS3101 read type K and type J thermocouples on different channels?
Yes, in Sysmac Studio each of the four channels can be configured independently for K, J, T, E, L, U, N, R, S, B, WRe5-26 or PLII. All four channels share the same 0.1 C resolution and 250 ms conversion time per unit, so mixing types on one unit does not slow the scan.
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