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DSCA47K-04

Linearized Thermocouple Input Signal Conditioner

DSCA47K-04
Linearized Thermocouple Input Signal Conditioner

Product Availability:
  • Usually stock to 3-5 weeks. Contact Customer Service for current lead times.

Description

Each DSCA47 thermocouple input module provides a single channel of thermocouple input which is filtered, isolated, amplified, linearized, and converted to a high-level voltage 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 poles are on the system 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 DSCA47 can interface to eight industry standard thermocouple types: J, K, T, E, R, S, B and N. Each module has cold junction compensation to correct for parasitic thermocouples formed by the thermocouple wire and input screw terminals on the module. Upscale open thermocouple detection is provided by internal circuitry. Downscale indication can be implemented by installing a 47MΩ, ±20% resistor between screw terminals 6 and 8 on the input terminal block.


Module output is either voltage or current. For current output models a dedicated loop supply is provided at terminal 3 (+OUT) with loop return located at terminal 4 (-OUT). The system-side load may be either floating or grounded.


Special input circuits provide protection against accidental connection of powerline voltages up to 240VAC and against transient events as defined by ANSI/IEEE C37.90.1. Protection circuits are also present on the signal output and power input terminals to guard against transient events and power reversal. Power lines are secured to the module using screw terminals which are in pluggable terminal blocks for ease of system assembly and reconfiguration.


The modules have excellent stability over time and do not require recalibration, however, zero and span settings are adjustable up to ±3% to accommodate situations where fine-tuning is desired. The adjustments are made using potentiometers located under the front panel label and are non-interactive for ease of use.

Features

  • Interfaces to Types J, K, T, E, R, S, B, and N Thermocouples
  • Linearizes Thermocouple Signal
  • Industry Standard Output of either 0-10V, 0-20mA, or 4-20mA
  • 1500Vrms Transformer Isolation
  • ANSI/IEEE C37.90.1 Transient Protection
  • Input Protected to 240VAC Continuous
  • True 3-Way Isolation
  • Wide Range of Supply Voltage
  • 160dB CMR
  • 85dB NMR at 60Hz, 80dB at 50Hz
  • ±0.08% Accuracy
  • Easily Mounts on Standard DIN Rail
  • C-UL-US Listed
  • CE and ATEX Compliant

Block Diagram

Certifications

Specifications

  • Thermocouple Type K
  • Output Range 0 to +10 V
  • Input Temperature Range 0 to 1000 °C
  • Mechanical Format DIN rail
  • Isolation Voltage 1500 Vrms
  • Isolation Type Transformer 3-way
  • Accuracy ±0.08% (±0.80°C)
  • Supply Voltage 15 to 30 Vdc (+24V Nom)
  • Input Voltage Withstand 240 Vrms
  • Gain/Offset Adjust ±3%
  • Module Bandwidth 3 Hz
  • NMR (60 Hz) Rejection 95 dB at 60 Hz, 85dB at 50Hz
  • External I-to-V Resistor N/R
  • Output Control Always enabled
  • Output Resistance <1 Ohm
  • Dimensions 2.95 x 0.89 x 4.13 inches
  • Interface 8 Pos terminal block
  • Customization yes
  • Weight 136 grams (4.8 ounces)

Accessories

DSCAX-01
Connector Plug Labeled 1,2,3,4 View
DSCAX-02
Connector Plug Labeled 5,6,7,8 View
DSCX-BLANK
Blank Empty DIN Rail Case for Holding Position. DSCA or DSCT View
PWR-PS5R120W
Power Supply, DIN Rail Mount, 85-264 VAC 47-63 Hz In, 24 VDC 5.0 A Out View
PWR-PS5R15W
Power Supply, DIN Rail Mount, 85-264 VAC 47-63 Hz In, 24 VDC 0.65 A Out View
PWR-PS5R30W
Power Supply, DIN Rail Mount, 85-264 VAC 47-63 Hz In, 24 VDC 1.3 A Out View
PWR-PS5R60W
Power Supply, DIN Rail Mount, 85-264 VAC 47-63 Hz In, 24 VDC 2.5 A Out View
PWR-PS5R7W
Power Supply, DIN Rail Mount, 85-264 VAC 47-63 Hz In, 24 VDC 0.3 A Out View
SCMXRAIL1-1.0
DIN EN 50022-35 x 7.5 (slotted steel), 1 meter length View
SCMXRAIL1-2.0
DIN EN 50022-35 x 7.5 (slotted steel), 2 meter length View
SCMXRAIL2-01
DIN EN 50035-G32 (slotted steel), 1 meter length View
SCMXRAIL2-02
DIN EN 50035-G32 (slotted steel), 2 meter length View
SCMXRAIL3-01
DIN EN 50022-35 x 15 (slotted steel), 1 meter length View
SCMXRAIL3-02
DIN EN 50022-35 x 15 (slotted steel), 2 meter length View

Competitive Cross-Reference

  • No cross reference is available.
View Dataforth cross-reference data.
The information available through this competitive cross reference guide are based upon product catalog information obtained from a variety of sources. The competitive cross reference information is being provided to you free of charge for your use. While Dataforth Corp has used reasonable efforts to ensure data accuracy, Dataforth Corp does not guarantee that it is error-free, nor does Dataforth Corp make any other representation, warranty or guarantee that the information is accurate, correct, reliable or up-to-date. Dataforth Corp expressly disclaims all implied warranties regarding this information, including but not limited to any implied warranties of merchantability or fitness for a particular purpose.

This information is provided only as a convenience on an "as is" basis and Dataforth Corp. or its representatives or distributors are not responsible for any incorrect, inaccurate, or incomplete information. You are solely responsible for (1) selecting the appropriate Dataforth products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable standards, and any other safety, security, or other requirements.

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