Red Lion ITMA2003 Thermocouple Module
Intelligent thermocouple module that converts TC or millivolt input into 4 to 20mA output
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- Part number ITMA2003
- Manufactured by Red Lion
- 12 to 42 VDC loop powered
- Microprocessor controlled
- Simple adjustable range setting
- Thermocouple break detection
- Mounts on "T" and "G" style DIN rails
- 2-way electrical isolation (input/output & power)
- High density packaging (22.5mm wide)
The Red Lion ITMA2003 Thermocouple Module accepts a thermocouple or millivolt input and converts it into a 4to 20 mA current output. The 4 to 20 mA output is linearly proportional to the temperature or the millivolt input. This output is ideal for interfacing to indicators, chart recorders, controllers, or other instrumentation equipment.
The ITMA is loop-powered which means that the same two wires are carrying both the power and the output signal. The unit controls the output current draw from 4 to 20 mA in direct proportion to the input change while consuming less than 4 mA for power. The conversion to a current output signal makes the ITMA less susceptible to noise interference and allows accurate transmission over long distances. The 2-Way isolation allows the use of grounded thermocouples which can provide additional noise reduction benefits.
The ITMA uses a ten position DIP switch to accomplish the input sensor configuration, range selection, and unit calibration. A simple range setting technique (Field Calibration) is used so the actual input signal adjusts the output current for scaling. This technique eliminates the need for potentiometers which are vulnerable to changes due to vibration.
The unit is equipped with a universal mounting foot for attachment to standard DIN style mounting rails, including top hat rail (T) according to EN 50 022 - 35 x 7.5 and 35 x 15, and G profile according to EN 50 035 - G 32.