SCM7B37 Non-Linearized Isolated Thermocouple Input Modules

SCM7B37 Non-Linearized Isolated Thermocouple Input Modules

SKU: SCM7B37
Category: Signal Conditioning
Manufacturers: Dataforth

Interfaces to Type J, K, T, E, R, S, and B Thermocouples
Noise, 500µV Peak (5MHz), 250µV RMS (100kHz)
CMRR 160dB, NMR up to 85dB
ATEX Compliant

Input Range
Output Range

from

135,90 €

excl. 19% VAT , plus

From	Unit price
5	144,96 €*
10	138,92 €*
20	135,90 €*

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Description
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Interfaces to Type J, K, T, E, R, S, and B Thermocouples
Provides High-Level Voltage Outputs
1500Vrms Transformer Isolation
Accuracy, ±0.03% of Span Typical, ±0.1% Max
Input Protected to 120Vrms Continuous
Noise, 500µV Peak (5MHz), 250µV RMS (100kHz)
CMRR, 160dB
NMR, up to 85dB
ATEX Compliant

SCM7B37 non-linearized modules accept a single channel of input from Type J, K, T, E, R, S, or B thermocouples. The signal is filtered, isolated, amplified, and converted to a high-level analog voltage for output to the process control system.

Cold junction compensation (CJC) is performed using an NTC thermistor externally mounted under the field-side terminal block on the backpanel. Open thermocouple detection is upscale using a 30nA current source in the input circuitry. These modules incorporate a five-pole filtering approach to maximize both time and frequency response by taking advantage of both Thomson (Bessel) and Butterworth characteristics. One pole of the filter is on the field side of the isolation barrier; four are on the process control system side.

After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit and transferred across the transformer isolation barrier, suppressing transmission of common mode spikes and surges. The signal is then reconstructed and filtered for process control system output.

Modules accept a wide 14 - 35VDC power supply range (+24VDC nominal). Their compact packages (2.13"x1.705"x0.605" max) save space and are ideal for high channel density applications. They are designed for easy DIN rail mounting using any of the "-DIN" backpanels.

Item information	Value
Output Type:	Analog
Module series:	7B Series
Input Type:	Thermocouple

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