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CM3 Thermocouple Module Features

CM3 Thermocouple Module​


The CM3-SP04ETO Thermocouple Module from CIMON provides high-accuracy temperature measurement using K, J, E, T, B, R, S, and N-type thermocouples. Designed for real-time thermal monitoring, this module converts thermocouple voltage readings into precise 14-bit digital temperature values, ensuring stable and accurate thermal data acquisition. Features like automatic reference junction compensation (RJC), user-defined temperature calibration, and error detection for wire disconnection make the CM3-SP04ETO ideal for industrial furnaces, manufacturing processes, and environmental monitoring systems. With multi-channel support and fast conversion rates, this module ensures seamless integration into complex automation networks.

Features​

  • The CM3-SP04ETO is a thermocouple module that directly connects 8 thermocouples to a thermocouple input module. The module converts the temperature (°C or °F) by the first decimal digit and outputs a digital value between 0 ~ 16,000. The following are the thermocouples:
    • K
    • J
    • E
    • T
    • B
    • R
    • S
    • N
  • The CM3-SP04ETO is used to convert temperature data into signed 14-bit binary data for a digital value. This module converts the minimum and maximum values into 0 ~ 16,000 (-8,000 ~ 8,000).
  • Temperatures indicate a minimum value of -50°C (-58°F) and a maximum value of 50°C (122°F).
    • The minimum digital value is expressed as 0 (-8,000).
    • The maximum digital value is expressed as 16,000 (8,000).
  • If the minimum and maximum temperature values are set up, the temperature is converted into the minimum value, 0 (-8,000), and the maximum value, 16,000 (8,000).
  • Broken cables, thermocouple, or out-of-range measurements by the channels can be detected.
  • There are 4 channels on the CM3-SP04ETO expansion module for 4 thermocouples.
  • There are no limitations for the number of thermocouple modules on one base.
  • Reference Junction Compensation (RJC) is automatically performed by the temperature sensor attached to the terminal.

Example​


  1. The electromotive force in the thermocouple is varying depending on changes in temperature near both ends of each thermocouple.
  2. The CM3-SP04ETO performs linearization for the electromotive force input from the thermocouple which is non-linear.
  3. The temperature is stored in the internal memory of the CM3-SP04ETO as a converted temperature.
  4. The CM3-SP04ETO uses the converted temperature or digitally-converted value stored in buffer memory in the module using the FROM instruction in the scan program.