Features

RTD Module Features

The IO-SA0400 measures the input from a resistor and converts it into a 14-bit digital temperature (°C/°F) value.

• The RTD module converts temperature from the following resistor types into a 1-digit number after the decimal point. It outputs a digital value in the range 0 ~ 16,000.
  • Platinum100 (PT100)
  • Platinum1000 (PT1000)
  • Japanese Platinum100 (JPT100)
  • Nickel1000 (Ni1000)
• The RTD module converts the following temperatures based on their resistor types into a digital value between 0 ~ 16,000 (-8,000 ~ 8,000).
  • Platinum100 (PT100), Platinum1000 (PT1000), and Japanese Platinum100 (JPT100)
    • -200°C ~ 600°C (-328°F ~ 1,112°F)
  • Nickel1000 (Ni1000)
    • -50°C ~ 160°C (-58°F ~ 320°F)
• The RTD module can show a temperature range based on the following resistor types. If the value is digital, the shown range is -192 ~ 16,191 (-8,192 ~ 8,192).
  • Platinum100 (PT100), Platinum1000 (PT1000), and Japanese Platinum100 (JPT100)
    • -250°C ~ 650°C (-418°F ~ 1,202°F)
  • Nickel1000 (Ni1000)
    • -60°C ~ 170°C (-76°F ~ 338°F)
• 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-SP04ERO expansion module.
• The RTD module has an LED indicator for status.
  • Normal: LED is ON.
  • Error: LED is blinking

Output:

• PT100 & JPT100: 0°C/32°F → 100.0Ω output
• PT1000: 0°C/32°F → 1,000.0Ω output
• Ni1000: 0°C/32°F → 1,000.0Ω output

Example

1. The resistance of the PT100 sensor varies depending on changes in the surrounding temperature.
2. The RTD module performs linearization for the resistance input of RTD which is non-linear (shown above).
3. The temperature is stored in the internal memory of the RTD module as a converted temperature.
4. The RTD module uses the converted temperature or digitally converted value stored in buffer memory in the module using the FROM instruction in the scan program.