Dataforth Corporation SCM7B21/30/31 Isolated Analog Voltage Input Module SCM7B21/30/31-xx

Description
Each SCM7B21/30/31 voltage input module accepts one channel of analog voltage input which is filtered, isolated, amplified, and converted to a high-level analog voltage for output to the process control system. 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.
  • SCM7B21/30/31 Isolated Analog Voltage Input Module - SCM7B21/30/31-xx - Dataforth Corporation
    Dataforth Corporation
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Description
Each SCM7B21/30/31 voltage input module accepts one channel of analog voltage input which is filtered, isolated, amplified, and converted to a high-level analog voltage for output to the process control system. 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.
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Datasheet
Datasheet Summary
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The SCM7B21/30/31 is a family of isolated analog voltage-input modules designed for industrial process control, accepting millivolt or voltage-level signals and outputting a high-level analog voltage. Each module provides 1500Vrms transformer isolation, 160dB common-mode rejection ratio, and input protection up to 120Vrms continuous. The modules feature a five-pole filtering architecture with one pole on the field side and four on the system side, coupled with a proprietary chopper circuit for common-mode surge suppression. They operate from a 14-35VDC power supply, occupy a compact 2.13" × 1.705" × 0.605" footprint, and support DIN-rail mounting. Accuracy is ±0.03% of span (typical) and ±0.1% (maximum), with noise levels of 500μVp-p at 5MHz and 250μVrms at 100kHz. The family is certified to CSA C/US, CE, ATEX, and ANSI/IEEE C37.90.1 standards, and complies with RoHS III Directive 2015/863.

Datasheet Summary
Powered by GS/AI

The SCM7B21/30/31 is a family of isolated analog voltage-input modules designed for industrial process control, accepting millivolt or voltage-level signals and outputting a high-level analog voltage. Each module provides 1500Vrms transformer isolation, 160dB common-mode rejection ratio, and input protection up to 120Vrms continuous. The modules feature a five-pole filtering architecture with one pole on the field side and four on the system side, coupled with a proprietary chopper circuit for common-mode surge suppression. They operate from a 14-35VDC power supply, occupy a compact 2.13" × 1.705" × 0.605" footprint, and support DIN-rail mounting. Accuracy is ±0.03% of span (typical) and ±0.1% (maximum), with noise levels of 500μVp-p at 5MHz and 250μVrms at 100kHz. The family is certified to CSA C/US, CE, ATEX, and ANSI/IEEE C37.90.1 standards, and complies with RoHS III Directive 2015/863.

Suppliers

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SCM7B21/30/31 Isolated Analog Voltage Input Module - SCM7B21/30/31-xx - Dataforth Corporation
Dataforth Corporation
Tucson, AZ, USA
SCM7B21/30/31 Isolated Analog Voltage Input Module
SCM7B21/30/31-xx
SCM7B21/30/31 Isolated Analog Voltage Input Module SCM7B21/30/31-xx
Each SCM7B21/30/31 voltage input module accepts one channel of analog voltage input which is filtered, isolated, amplified, and converted to a high-level analog voltage for output to the process control system. 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.

Each SCM7B21/30/31 voltage input module accepts one channel of analog voltage input which is filtered, isolated, amplified, and converted to a high-level analog voltage for output to the process control system.
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.

Supplier's Site Datasheet

Technical Specifications

  Dataforth Corporation
Product Category Data Acquisition
Product Number SCM7B21/30/31-xx
Product Name SCM7B21/30/31 Isolated Analog Voltage Input Module
Data Acquisition Input Module; Input/Output Module
Form Factor Rack Mount; DIN Rail
Outputs Analog Voltage Output
Filter / Amplifier Amplifier; Filter
Agency Approval CSA, CE
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