Each DSCT37 non-linearized thermocouple input transmitter provides a single channel of thermocouple input which is filtered, isolated, amplified, 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.

The DSCT37 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 DSCT37 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 ±10%. The adjustments are made using potentiometers located under the front panel label and are non-interactive for ease of use.
  • Interfaces to Types J, K, T, E, R, S, B, and N Thermocouples
  • 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
  • ±0.05% Accuracy
  • ±0.01% Linearity
  • Easily Mounts on Standard DIN Rail
  • CSA and FM Approvals Pending
  • CE Compliant
Non-Linearized Thermocouple Input Transmitters

DSCT37 Devices


Part Number Thermocouple TypeOutput RangeInput Temperature RangeMechanical FormatIsolation VoltageIsolation TypeAccuracy
B 4 to 20 mA 0 to 1800 °C DIN rail 1500 Vrms Transformer ±0.05% (0.90°C) max
E 4 to 20 mA 0 to 900 °C DIN rail 1500 Vrms Transformer ±0.05% (0.45°C) max
J 4 to 20 mA -100 to 760 °C DIN rail 1500 Vrms Transformer ±0.05% (0.43°C) max
K 4 to 20 mA -100 to 1350 °C DIN rail 1500 Vrms Transformer ±0.05% (0.73°C) max
N 4 to 20 mA -100 to 1300 °C DIN rail 1500 Vrms Transformer ±0.05% (0.70°C) max
R 4 to 20 mA 0 to 1750 °C DIN rail 1500 Vrms Transformer ±0.05% (0.88°C) max
S 4 to 20 mA 0 to 1750 °C DIN rail 1500 Vrms Transformer ±0.05% (0.88°C) max
T 4 to 20 mA -100 to 400 °C DIN rail 1500 Vrms Transformer ±0.05% (0.25°C) max

Frequently Asked Questions


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

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.