Linearized Thermocouple Input Transmitter

Linearized Thermocouple Input Transmitter

Product Availability:
  • Usually stock to 2-3 weeks.


Each DSCT47 thermocouple input transmitter provides a single channel of thermocouple input which is filtered, isolated, amplified, linearized, and converted to a process current output. Signal filtering is accomplished with a five-pole filter, which provides 85dB of normal-mode rejection at 60Hz and 80dB at 50Hz. An anti-aliasing pole is located on the field side of the isolation barrier, and the other four are on the process loop side. After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges.

Linearization is achieved by creating a non-linear transfer function through the module itself. This non-linear transfer function is configured at the factory and is designed to be equal and opposite to the thermocouple non-linearity.

The DSCT47 can interface to eight industry standard thermocouple types: J, K, T, E, R, S, B and N. Each transmitter is cold-junction compensated to correct for parasitic thermocouples formed by the thermocouple wire and screw terminals on the transmitter. Upscale open thermocouple detection is provided by circuitry. Downscale indication can be implemented by installing a 47 MOhm, ±20% resistor between screw terminals 6 (+IN) and 8 (-EXC) on the input terminal block.

Special input and output circuits on the DSCT47 transmitters provide protection against accidental connection of power-line voltages up to 240VAC and against transient events as defined by ANSI/IEEE C37.90.1. Loop power lines are secured to the module using screw terminals, which are in pluggable terminal blocks for ease of system assembly and reconfiguration. Transmitter zero and span settings are adjustable up to ±3%. The adjustments are made using potentiometers located under the front panel label and are non-interactive for ease of use.


  • Thermocouple Type K
  • Output Range 4 to 20 mA
  • Input Temperature Range -100 to 1350 °C
  • Mechanical Format DIN rail
  • Isolation Voltage 1500 Vrms
  • Isolation Type Transformer
  • Accuracy ±0.1% (1.45°C) max
  • Supply Voltage 10.8V to 60V
  • Input Voltage Withstand 240Vrms
  • Gain/Offset Adjust ±3% Zero and Span
  • Module Bandwidth 3 Hz
  • NMR (60 Hz) Rejection 85 dB at 60 Hz, 80 dB at 50 Hz
  • External I-to-V Resistor N/A
  • Output Control Always enabled
  • Output Resistance
  • Dimensions 2.95 x 0.89 x 4.13 inches
  • Interface 8 Pos terminal block
  • Customization YES
  • Weight 138 grams (4.87 ounces)


  • Interfaces to Types J, K, T, E, R, S, B, and N Thermocouples
  • Linearizes Thermocouple Signal
  • Process Current Output
  • 1500Vrms Transformer Isolation
  • ANSI/IEEE C37.90.1 Transient Protection
  • Input and Output Protected to 240VAC Continuous
  • Up to 60V Loop Voltage
  • 160dB CMR
  • 85dB NMR at 60Hz, 80dB at 50Hz
  • ±0.10% Accuracy
  • Easily Mounts on Standard DIN Rail
  • CSA and FM Approvals Pending
  • CE Compliant

Block Diagram

DSCT47 block diagram


Due to resource constraints on my computer, I'm unable to open the three dimensional CAD models provided on your website. Does Dataforth provide two demensional CAD models for download as well?
Two dimensional CAD models can be generated upon customer request. Please contact Customer Service for assistance.
If a thermocouple is soldered to a lead that has current running through it, how do you avoid affecting the thermocouple signal and subsequent measurement?
The thermocouples must be isolated so current does not come from the circuit under test and run through them. SCM5B, SCM7B, 8B, DSCA, DSCT, MAQ20 all offer the required isolation.
How does the load resistance of a module affect the noise at the output?
Noise at the output of a module is independent of load resistance.
Can Dataforth provide calibration reports for modules I purchased?
Yes we can provide calibration reports for the modules that you purchased. You can either a) visit https://www.dataforth.com/TestDataReport.aspx to search for Test Report Datasheets by Serial Number or b) you can send us a list of model numbers and their serial numbers to support@dataforth.com

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Blank Empty DIN Rail Case for Holding Positiion. DSCA or DSCT View
DIN EN 50022-35 x 7.5 (slotted steel), 1 meter length View
DIN EN 50022-35 x 7.5 (slotted steel), 2 meter length View
DIN EN 50035-G32 (slotted steel), 1 meter length View
DIN EN 50035-G32 (slotted steel), 2 meter length View
DIN EN 50022-35 x 15 (slotted steel), 1 meter length View
DIN EN 50022-35 x 15 (slotted steel), 2 meter length View
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