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SensorLex8B38

Strain Gage Input Modules, Bandwidth 3 Hz / 8 kHz

SensorLex8B38 image

8B modules are an optimal solution for monitoring real-world process signals and providing high-level signals to a data acquisition system. Each 8B38 module isolates, filters, and amplifies a full-bridge strain gage input signal and provides an analog voltage output.

The 8B38 can interface to transducers with a nominal resistance of 100 Ω to 2 kΩ. Bridge excitation is provided from the module with a stable 10.00 V or 3.33 V source. Full scale sensitivities of 2 mV/V and 3 mV/V are offered as standard.

Signal filtering is accomplished with a 5-pole filter optimized for time and frequency response which provides 100 dB per decade of normal-mode rejection above the filter cutoff frequency. One pole of this filter is on the field side of the isolation barrier for anti-aliasing, and the other four are on the system side.

A special input circuit on the 8B38 module provides protection against acciden-tal connection of power-line voltages up to 240 VAC. Clamp circuits on the I/O and power terminals protect against harmful transients.

Isolation is provided by transformer coupling to suppress transmission of common mode spikes or surges. The module is powered from + 5 VDC, ± 5%.

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 SensorLex8B38

Block Diagram SensorLex8B38



PDF Downloads:

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

  • 12 Modules for Type SensorLex8B38:

    ModuleInputDescription
    8B38-01 3.333 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-02 10.0 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-05 10.0 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-31 3.333 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-32 10.0 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-35 10.0 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-06 3.333 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-07 10.0 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-08 10.0 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-36 3.333 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-37 10.0 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output
    8B38-38 10.0 V SensorLex8B38 Isolated Strain Gage Input Module, Narrow and Wide Bandwidth with Voltage-Output

    Specifications

    top
    • Input: Full-Bridge
    • Output: - 5 V … + 5 V
    • Bandwidth 3 Hz (8B38-3x) or 8 kHz (8B38-0x)
    • 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 100dB
    • True 2-way isolation
    • NMR: 100dB / Decade > 8 kHz or 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