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Model ITMA Intelligent Thermocouple Module
Brand: Red Lion ControlsThe ITMA accepts a thermocouple or millivolt input and converts it into a 4 to 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.
Features- User programmable input
- 12-42 Vdc loop-powered
- Microprocessor controlled
- Simple adjustable range setting
- Thermocouple break detection
- Mounts on "T" and "G" style DIN rails
- 2-way electrical isolation
- High density packaging
- Wide operating temperature range
Specifications
Brand
Accuracy
- ± [0.075 % Range + 0.25° C (0.45° F) Conformity + 0.50° C (0.9° F) Ice Point] at 23° C (73.4° F) after 20 minutes Warm-Up, Conforming to ITS-90
- ± 0.0113 to ± 0.0645 mV
- Thermocouple: ± 0.19° to ± 1.17° C (± 0.342° to ± 2.106° F)
Approvals & Certifications
- CE
- EMC EN 61326-1 Immunity to Industrial Locations, Emission CISPR 11 Class A
- IEC/EN 61010-1
Current
- Thermocouple Break Detection: Downscale to 3.6 mA (Nominal)
- Thermocouple Break Detection: Upscale to 22.5 mA (Nominal)
Electrical Connectors
- Compression Typical Terminal Block
Enclosure, Body Material
- Plastic
Humidity
- 85 % Relative Humidity, Non-Condensing from -25° to 75° C
Load
- 250 ohms
Mounting
- Standard DIN Top Hat (T) Profile Rail According to EN 50022 - 35 x 7.5 & 35 x 15 & G Profile Rail According to EN 50035-G32
Operating Temperature
- -25° to 75° C (-13° to 167° F)
Output
- Loop Powered (Passive), 4-20 mA Linear Output
- Ripple: < 15 mV Peak-to-Peak, Max.
Power
- 12-42 Vdc (Loop Powered), 30 mA Min. Capacity
Power Supply
- 30 mA
Resolution
- 12-bits
Response Time
- 400 milliseconds
Sensor, Probe Type
- E Thermocouple
- J Thermocouple
- K Thermocouple
- T Thermocouple
Shock
- 30 G to IEC 68-2-27
Span - Minimum
- 1/8 of Full Scale Range
Storage Temperature
- -40° to 85° C (-40° to 185° F)
Switch Type
- DIP Switches
Temperature Coefficient
- ± 0.01 % of Input Range/°C
Temperature Range
- Thermocouple J, K, T & E: -195° to 790° C (-319° to 1454° F)
Vibration
- 2 G, 5 to 150 Hz to IEC 68-2-6
Voltage
- Dielectric Withstand Voltage: 1,500 Vac for 1 Minute at 50 Vac Working Volts, from Input to Output
