DSCT47 - Linearized Thermocouple Input Transmitters

Main features

  • 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
  • CE Compliant
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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.

DSCT47B-11 - Thermocouple type: B, Input Range: 500 to 1800°C, Output Range: 4 to 20mA

Transmitters

DSCT47E-08 - Thermocouple type: E, Input Range: 0 to 1000°C, Output Range: 4 to 20mA

Transmitters

DSCT47J-01 - Thermocouple type: J, Input Range: 0 to 760°C, Output Range: 4 to 20mA

Transmitters

DSCT47J-02 - Thermocouple type: J, Input Range: -100 to 300°C, Output Range: 4 to 20mA

Transmitters

DSCT47J-03 - Thermocouple type: J, Input Range: 0 to 500°C, Output Range: 4 to 20mA

Transmitters

DSCT47K-04 - Thermocouple type: K, Input Range: 0 to 1000°C, Output Range: 4 to 20mA

Transmitters

DSCT47K-05 - Thermocouple type: K, Input Range: 0 to 500°C, Output Range: 4 to 20mA
DSCT47K-13 - Thermocouple type: K, Input Range: -100 to 1350°C, Output Range: 4 to 20mA

Transmitters

DSCT47K-14 - Thermocouple type: K, Input Range: 0 to 1200°C, Output Range: 4 to 20mA

Transmitters

DSCT47N-15 - Thermocouple type: N, Input Range: -100 to 1300°C, Output Range: 4 to 20mA

Transmitters

DSCT47R-09 - Thermocouple type: R, Input Range: 500 to 1750°C, Output Range: 4 to 20mA

Transmitters

DSCT47S-10 - Thermocouple type: S, Input Range: 500 to 1750°C, Output Range: 4 to 20mA

Transmitters

DSCT47T-06 - Thermocouple type: T, Input Range: -100 to 400°C, Output Range: 4 to 20mA

Transmitters

DSCT47T-07 - Thermocouple type: T, Input Range: 0 to 200°C, Output Range: 4 to 20mA

Transmitters

DSCT47Linearized Thermocouple Input Transmitters
DSCT47B-11Thermocouple type: B, Input Range: 500 to 1800°C, Output Range: 4 to 20mA
DSCT47E-08Thermocouple type: E, Input Range: 0 to 1000°C, Output Range: 4 to 20mA
DSCT47J-01Thermocouple type: J, Input Range: 0 to 760°C, Output Range: 4 to 20mA
DSCT47J-02Thermocouple type: J, Input Range: -100 to 300°C, Output Range: 4 to 20mA
DSCT47J-03Thermocouple type: J, Input Range: 0 to 500°C, Output Range: 4 to 20mA
DSCT47K-04Thermocouple type: K, Input Range: 0 to 1000°C, Output Range: 4 to 20mA
DSCT47K-05Thermocouple type: K, Input Range: 0 to 500°C, Output Range: 4 to 20mA
DSCT47K-13Thermocouple type: K, Input Range: -100 to 1350°C, Output Range: 4 to 20mA
DSCT47K-14Thermocouple type: K, Input Range: 0 to 1200°C, Output Range: 4 to 20mA
DSCT47K-15Thermocouple type: N, Input Range: -100 to 1300°C, Output Range: 4 to 20mA
DSCT47R-09Thermocouple type: R, Input Range: 500 to 1750°C, Output Range: 4 to 20mA
DSCT47S-10Thermocouple type: S, Input Range: 500 to 1750°C, Output Range: 4 to 20mA
DSCT47T-06Thermocouple type: T, Input Range: -100 to 400°C, Output Range: 4 to 20mA
DSCT47T-07Thermocouple type: T, Input Range: 0 to 200°C, Output Range: 4 to 20mA

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