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SensorLex8B47

Linearized Thermocouple Input Modules, Bandwidth 3 Hz

SensorLex8B47 image

8B modules are an optimal solution for monitoring real-world process signals and providing high-level signals to a data acquisition system. Each 8B47 module isolates, filters, amplifies, and linearizes a single channel of temperature input from a thermocouple and provides an analog voltage output.

Linearization is accomplished using a four breakpoint piecewise linear approximation.

The 8B47 can interface to industry standard thermocouple types J, K, and T and has an output signal of 0 to + 5 V. Each module is cold-junction compensated to correct for parasitic thermocouples formed by the thermocouple wire and screw terminals on the mounting backpanel. Upscale open thermocouple detect is provided by an internal pull-up resistor.

Signal filtering is accomplished with a 3-pole filter optimized for time and frequency response which provides 70 dB of normal-mode rejection at 60 Hz. One pole of this filter is on the field side of the isolation barrier for anti-aliasing, and the other two are on the system side.

A special input circuit on the 8B47 module provides protection against accidental connection of power-line voltages up to 240 VAC. Clamp circuits on the I/O and power terminals protect against harmful transients.

The modules are designed for installation in Class I, Division 2 hazardous locations and have a high level of immunity to environmental noise.

Circuit diagram Dataforth SensorLex8B47

Block Diagram SensorLex8B47



PDF Downloads:

  • Product Overview SensorLex8B
  • Produkt Catalog SensorLex8B
  • Backpanels and Accessories

  • 10 Modules for Type SensorLex8B47:

    ModuleInputDescription
    8B47J-01 Type J SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47J-02 Type J SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47J-03 Type J SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47J-12 Type J SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47K-04 Type K SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47K-05 Type K SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47K-13 Type K SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47K-14 Type K SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47T-06 Type T SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output
    8B47T-07 Type T SensorLex8B47 Isolated Linearized Thermocouple Input Module with Voltage-Output

    Specifications

    top
    • Input: Thermocouple Type J, K and T
    • Output: 0 V … 5 V
    • Bandwidth 3 Hz
    • Isolation 1500 Vrms
    • Input protection 240 VAC
    • Input Resistance 50 MOhm
    • Accuracy ± 0.21% bis ± 0.48%
    • ANSI/IEEE C37.90.1 Input protection
    • CMR 120dB
    • True 2-way isolation
    • NMR: 70dB at 60Hz
    • Power Supply +5 VDC
    • Operating Temperature Range -40°C … +85°C
    • Mix and Match Types on Backpanels possible
    • Dimensions 28.1 x 41.9 x 10.2 mm
    • Optional DIN Rail Mounting
    • CE compliant, UL listed
    • Wide range of accessories
    • Special Solutions on request