60 Analog I/O Modules (AD268 / DA264 / TC218)
1. Introduction PART 3 TC218
1. Introduction
The TC218 is a thermocouple input module for the T2 series programmable controllers.
The TC218 is used to measure the temperature using thermocouples. Thermocouples type K,
J, or E can be used.
The TC218 can be used for ±100mV input also.
When the TC218 is used for the thermocouple input, it has 7 channels of thermocouple input.
The remaining 1 channel is used to measure the ambient temperature for cold junction
compensation. For this purpose, a thermistor is attached with the TC218.
On the other hand, when the TC218 is used for ±100mV input, it has 8 channels of input.
1.1 TC218 Functions
The TC218 has the following functions.
1) 7 channels input per module for thermocouple input
8 channels input per module for ±100mV input
2) Selectable input type
• Thermocouple type K (-200 to +1200 °C)
• Thermocouple type J (-200 to +800 °C)
• Thermocouple type E (-200 to +600 °C)
• ±100mV
3) 16-bit high-resolution A/D conversion
4) Built-in linearize function
5) Cold junction compensation function
6) Burnout detection function
7) Input data averaging function
8) Gain and offset calibration function (±100mV input only)
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