---
title: "NORVI X-TC4 – DATASHEET"
description: "The **NORVI X-TC4** is a four-channel thermocouple input module designed for the **NORVI X industrial controller**. It provides four dedicated inputs for **K-type thermocouples**, enabling reliable temperature measurement across a wide temperature range. The module is suitable for industrial applications…"
url: "https://norvi.io/docs/norvi-x-tc4-datasheet/"
updated: "2026-10-20"
category: "NORVI X-TC4"
---

# NORVI X-TC4 – DATASHEET

The **NORVI X-TC4** is a four-channel thermocouple input module designed for the **NORVI X industrial controller**. It provides four dedicated inputs for **K-type thermocouples**, enabling reliable temperature measurement across a wide temperature range. The module is suitable for industrial applications requiring rugged and accurate temperature monitoring.

## Product Features

- 4 × K-Type Thermocouple Inputs
- Wide Temperature Measurement Range
- I²C communication interface
- High-Temperature Sensing Capability
- Independent 4-Channel Temperature Monitoring
- Compact design for expansion systems
- Designed for NORVI X modular architecture

## Applications

- Furnace and oven temperature monitoring
- Industrial process temperature measurement
- Motor and engine temperature monitoring
- Exhaust system temperature monitoring
- Heating and thermal control systems
- Industrial machinery and equipment monitoring
- HVAC and thermal management systems
- High-temperature process monitoring

## Product Block Diagram

![NORVI X-TC4](https://norvi.io/wp-content/uploads/2026/10/NORVI-X-TC4-Summary-Image.jpg)

## Main

| Range of Product | NORVI X |
| --- | --- |
| Product type | Expansion Module for NORVI X Series |
| Certifications | EN 61131-2:2007 EN 61010-1:2010+A1:2019 EN IEC 61010-2-201:2018 2014/30/EU- Electromagnetic Compatibility (EMC) Annex III, Part B, Module C |
| Rated supply voltage | 24V DC |

## Complementary

| Product Part Numbers | NORVI X-TC4 |
| --- | --- |

## Mechanical Properties

| Enclosure | NORVI X-N1 |
| --- | --- |
| Mounting / Installation Method | DIN RAIL |
| Terminal Type | Push-in terminal |
| Terminal Arrangement | Front |
| Length | 81.00 mm |
| Height | 104.00 mm |
| Width | 23.00 mm |

![NORVI X-TC4 Measurements](https://norvi.io/wp-content/uploads/2026/10/Measurements_NORVI-X-TC4.jpg)

## Environment

| IP degree of protection | IP20 |
| --- | --- |
| Operating altitude | 0 - 2000 meters |
| Operating Temperature | - –40 … +85° C (-40...185 °F) |
| Storage altitude | 0 - 3000 meters |
| Shock resistance | 15 gn for 11ms |
| Resistance to electrostatic discharge | 4kV on contact 8kV on air |
| Resistance to electromagnetic fields | 10 V/m (80 MHz ...... 1GHz) 3 V/m (1.4 MHz ...... 2 GHz) 1 V/m (2 MHz ...... 3 GHz) |

## Electrical Characteristics

*Grid Powered Devices*

| Rated Supply Voltage (V) | 24V DC |
| --- | --- |
| Current Consumption (mA) | 40mA @ 24VDC |

## Thermocouple Inputs

| Number of Thermocouple Inputs | 4 |
| --- | --- |
| Analog to Digital Converter (ADC) | MAX6675 |
| Thermocouple Type | K thermocouple |
| Thermocouple Input Impedance | 60 kΩ |
| Input Low Voltage | 0.3 VCC |
| Input High Voltage | 0.7 VCC |
| Supply Current | 0.7 mA to 1.5 mA |
| Input Leakage Current | ±5 µA |
| Temperature Range | 0°C to +1024°C |
| Thermocouple Accuracy | ±8 LSB, 0°C to +700°C at 3.3 V |
| ADC Resolution | 12-bit |
| Supply Voltage | 3.0V to 5.0V |

## Terminal Configuration

![NORVI X-TC4 Front Face](https://norvi.io/wp-content/uploads/2026/10/NORVI-X-TC4-FRONT-FACE.jpg)

| No. | Terminal | Description |
| --- | --- | --- |
| 1 | TC1+ | Thermocouple Positive (+) Input - Channel 1 |
| 2 | TC1- | Thermocouple Negative (-) Input - Channel 1 |
| 3 | TC2+ | Thermocouple Positive (+) Input - Channel 2 |
| 4 | TC2- | Thermocouple Negative (-) Input - Channel 2 |
| 5 | TC3+ | Thermocouple Positive (+) Input - Channel 3 |
| 6 | TC3- | Thermocouple Negative (-) Input - Channel 3 |
| 7 | TC4+ | Thermocouple Positive (+) Input - Channel 4 |
| 8 | TC4- | Thermocouple Negative (-) Input - Channel 4 |
| 9 | GND | Ground |

## GPIO Utilization

| Utilization | Connection to CPU |
| --- | --- |
| SCL | IO9 |
| SDA | IO8 |

## I2C Address Selection

![](https://norvi.io/wp-content/uploads/2026/09/image.png)

| Address Selection |  |  |  |  |
| --- | --- | --- | --- | --- |
| DIP 1 | DIP 2 | DIP 3 | DIP 4 | Address |
| OFF | OFF | OFF | OFF | 0x18 |
| ON | OFF | OFF | OFF | 0x17 |
| OFF | ON | OFF | OFF | 0x16 |
| ON | ON | OFF | OFF | 0x14 |
| OFF | OFF | ON | OFF | 0x13 |
| ON | OFF | ON | OFF | 0x12 |
| OFF | ON | ON | OFF | 0x11 |
| ON | ON | ON | OFF | 0x10 |
| OFF | OFF | OFF | ON | 0x0F |
| ON | OFF | OFF | ON | 0x0E |
| OFF | ON | OFF | ON | 0x0D |
| ON | ON | OFF | ON | 0x0C |
| OFF | OFF | ON | ON | 0x0B |
| ON | OFF | ON | ON | 0x0A |
| OFF | ON | ON | ON | 0x09 |
| ON | ON | ON | ON | 0x08 |

## Expansion Port

Utilized GPIO Connections are highlighted in Green. They cannot be used for any other purpose with this module connected.

| PIN INDEX | Purpose | GPIO | SOURCE |
| --- | --- | --- | --- |
| 1 | MOSI | IO11 | ESP32-S3 |
| 2 | MISO | IO13 |  |
| 3 | SCLK | IO12 |  |
| 4 | GND | ---- |  |
| 5 | SCL | IO9 |  |
| 6 | SDA | IO8 |  |
| 7 | GND | ---- |  |
| 8 | RX1 | IO18 |  |
| 9 | TX1 | IO17 |  |
| 10 | GND | ---- |  |
| 11 | D+ | ---- |  |
| 12 | D- | ---- |  |
| 13 | GND | ---- |  |
| 14 | CS1 | P1_0 | PCA9539 I2C Address 0x75 |
| 15 | CS2 | P0_7 |  |
| 16 | CS3 | P0_6 |  |
| 17 | CS4 | P0_5 |  |
| 18 | IO1 | IO1 | ESP32-S3 |
| 19 | IO2 | IO2 |  |
| 20 | IO4 | IO4 |  |
| 21 | IO5 | IO5 |  |
| 22 | IO6 | IO6 |  |
| 23 | IO7 | IO7 |  |
| 24 | IO10 | IO10 |  |
| 25 | IO11 | IO35 |  |
| 26 | IO12 | IO41 |  |
| 27 | IO13 | IO37 |  |
| 28 | IO14 | IO14 |  |
| 29 | RS485_TX | IO15 |  |
| 30 | GND | ---- |  |
| 31 | GND | ---- |  |
| 32 | RS485_RX | IO16 |  |
| 33 | P1_1 | P1_1 | PCA9539 I2C Address 0x75 |
| 34 | P1_2 | P1_2 |  |
| 35 | IO21 | IO21 | ESP32-S3 |
| 36 | GND | ---- |  |
| 37 | GND | ---- |  |
| 38 | P1_3 | P1_3 | PCA9539 I2C Address 0x75 |
| 39 | P1_4 | P1_4 |  |
| 40 | P1_5 | P1_5 |  |
| 41 | IO39 | IO39 | ESP32-S3 |
| 42 | IO40 | IO40 |  |
| 43 | NC | ---- |  |
| 44 | NC | ---- |  |
| 45 | NC | ---- |  |
| 46 | GND | ---- |  |
| 47 | 5V | 5V |  |
| 48 | GND | GND |  |
| 49 | 24V | 24V |  |
| 50 | 24V | 24V |  |