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SensorLex8B37

Non-Linearized Thermocouple Input Modules, Bandwidth 3 Hz

8B modules are an optimal solution for monitoring real-world process signals and providing high-level signals to a data acquisition system. Each 8B37 non-linearized module isolates, filters, and amplifies a single channel of temperature input from a thermocouple input signal and provides an analog voltage output.

The 8B37 can interface to industry standard thermocouple types J, K, T, R, and S 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 8B37 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 SensorLex8B37

Block Diagram SensorLex8B37



PDF Downloads:

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

  • 5 Modules for Type SensorLex8B37:

    ModuleInputDescription
    8B37J Typee J SensorLex8B37 Isolated Non-Linearized Thermocouple Input Module with Voltage-Output
    8B37K Typee K SensorLex8B37 Isolated Non-Linearized Thermocouple Input Module with Voltage-Output
    8B37R Type R SensorLex8B37 Isolated Non-Linearized Thermocouple Input Module with Voltage-Output
    8B37S Type S SensorLex8B37 Isolated Non-Linearized Thermocouple Input Module with Voltage-Output
    8B37T Type T SensorLex8B37 Isolated Non-Linearized Thermocouple Input Module with Voltage-Output

    Specifications

    top
    • Input: Thermocouple Type J, K, T, R and S
    • Output: 0 V … 5 V
    • Bandwidth 3 Hz
    • Isolation 1500 Vrms
    • Input protection 240 VAC
    • Input Resistance 50 MOhm
    • Accuracy ± 0.05%
    • Linearity ± 0.02%
    • 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, C-UL-US Listed
    • Wide range of accessories
    • Special Solutions on request