Product Features #
- Versions Available for Most Common Thermocouple Types: K-, J-, N-, T-, S-, R-, and E-Type
- Detects thermocouple shorts to GND or VCC.
- Detects an open thermocouple.
- Straight temperature readouts with a 0.25°C resolution
- I2C Interface with controller
Expansions Supported
- Analog Input
- Analog Output
Main #
| Range of Product | NORVI Expansion |
| Product Type | Expansion Module |
| 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 |
| Communication | WiFI / Bluetooth |
| Inputs and Outputs | 2 x Thermocouple interface |
| Displays and Visual Indicators | 1 LED green |
Complementary #
| Product Unified Code | NORVI EX-TEX01 |
| Product Part Numbers | NORVI EX-TEX01 |
Mechanical Properties #
| Enclosure | NORVI 202 |
| Mounting / Installation Method | DIN RAIL / MOUNTING TABS |
| Terminal Type | SCREW TERMINAL |
| Terminal Arrangement | Top and Bottom |
| Length | 59.00 mm |
| Height | 86.00 mm |
| Width | 35.00 mm |
Environment #
| IP degree of protection | IP20 |
| Operating altitude | 0 – 2000 meters |
| Operating Temperature | – –10 … +85° C (14…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) | 400mA |
| Recommended Power Source | 1A, 24V DC |
Processing #
| SOC / MCU | I2C to SPI connector |
| Module | SC18IS602B |
| Operating supply voltage | 2.4V to 3.6V |
| Resolution | 16bit |
| I2C SDA | GPIO16 |
| I2C SCL | GPIO17 |
INPUTS and OUTPUTS #
Analog Module communication #
| Module Type | Thermocouple-to-Digital Converter |
| Module | MAX31855 |
| Communication | I2C |
| Module Address | 0x48 |
| Accuracy | ±2°C for temperatures ranging |
| Conversion Time | 100 ms |
| Supply Voltage Range | -0.3V to +4.0V |
Thermocouple Inputs #
| Thermocouple Type | MAX31855 |
| Resolution | 14-Bit, 0.25° C |
| Versions Available | K, J, N, T, or E type |
| Supply Voltage Range | -0.3V to +4.0V |
| Junction Temperature | 150° C |
| Continuous Power Dissipation | 470.6mW |
| CS1 / Thermocouple T2 | GPIO0 |
| CS2 / Thermocouple T1 | GPIO1 |
Thermocouple Wire Connections and Nominal Sensitivities #
| TYPE | T- WIRE | T+ WIRE | TEMP RANGE (°C) | SENSITIVITY | COLD-JUNCION SENSITIVITY |
| K | Alumel | Chromel | -200 to +1350 | 41.276(0° C to +1000° C) | 40.73 |
| J | Constantan | Iron | -40 to +750 | 57.953 (0° C to +750° C) | 52.136 |
| N | Nisil | Nicrosil | -200 to + 1300 | 36.256(0° C to +1000° C) | 27.171 |
| S | Platinum/Rhodium | Platinum | +50 to +1600 | 9.587(0° C to +1000° C) | 6.181 |
| T | Constantan | Copper | -250 to +400 | 52.18(0° C to +400° C) | 41.56 |
| E | Constantan | Chromel | -40 to +900 | 76.373(0° C to +1000° C) | 44.123 |
| R | Platinum/Rhodium | Platinum | -50 to +1770 | 10.506(0° C to +1000° C) | 6.158 |
Expansion Port #
| PIN | ESP32 Connection |
| 1 | TXD0 |
| 2 | GPIO25 |
| 3 | RXD0 |
| 4 | AUX1 |
| 5 | GPIO15 |
| 6 | NRST |
| 7 | SCL2 |
| 8 | AUX2 |
| 9 | SDA2 |
| 10 | GND |
