*The RoHS icon on this product indicates that the PCBs, components, solder, and chemicals are all lead-free and RoHS compliant. Additionally, this product is produced using a lead-free process. Unfortunately, we are currently unable to provide documentation confirming that this product is RoHS compliant.
Resources:
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Package Includes:
This package doesn't include DIN-Rail PCB Holder, Thermocouple sensor and cables.
Notes:
- This board uses 4-pin connectors for I2C bus.
Features:
- Thermocouple to I2C-bus interface
- Temperature measurement based on MAX31855
- 14-bit resolution with 0.25 Degree Celsius precision
- Integrated Cold-Junction compensation
- Detects Open Thermocouples
- Detects Thermocouple Shorts to GND or VCC
- Supports type K thermocouple
- Data interfacing via I2C bus
- Configurable I2C address (2 selectable addresses via a jumper)
- Operating voltage: 3.3Vdc to 5Vdc
- Onboard inverse polarity protection circuit
- 400KHz I2C bus frequency
- Supports up to 2 boards on a single I2C bus
- Compatible with most microcontrollers
- Supports DIN-Rail PCB mounting
- PCB size 20x72 mm
This is an I2C-bus thermocouple board, I2C-TC31855DK. The board is designed around the MAX31855, a high- precision, cold-junction compensated thermocouple to digital converter. Since the MAX31855 uses SPI interface, a microcontroller typically requires at least three pins to communicate with a single chip. Furthermore, when multiple MAX31855 chips are connected, even more pins are needed.
However, this board is designed to convert the MAX31855’s SPI interface to an I2C bus, requiring only two microcontroller pins for communication. Additionally, multiple boards can be connected to the same I2C bus without increasing the number of required pins. The microcontroller can easily read temperature data via the I2C bus.
The board supports two different I2C addresses on a single bus. It also includes jumpers to enable pull-up resistors for SCL and SDA lines. The board can be mounted on a DIN-Rail PCB holder for industrial applications.
Since the MAX31855 operates at 3.3Vdc then it is not directly compatible with the 5Vdc system. However, this board is designed to function with both 3.3Vdc and 5Vdc, making it more versatile.
To prevent damage to the board, do not plug or unplug I2C cables while the power supply is on. Always turn off the power supply before plugging or unplugging I2C cables on the board.
