SCM7B35

Isolated 2-Wire Transmitter Interface Modules With Loop Power

SCM7B35 current input modules accept input signals in the 4-20mA range from the field and provide a high-level voltage output to the process control system. Current to voltage conversion occurs internal to the module, which is factory calibrated to ensure the highest accuracy.

Loop power is provided by the module, enabling a 2-wire transmitter to be directly connected without the need for a separate dc power supply for the 2-wire transmitter.

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 18 - 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.
Certifications

Documents

3D CAD/STEP Files 3D CAD Models
Product Availability
Usually stock to 3-5 weeks. Contact Customer Service for current lead times.

Dimensions & Accessories

Features

  • 2-Wire Transmitter Interface
  • Accepts 4-20mA Signals
  • Provides an Isolated +24VDC Supply to Power the Loop
  • Provides High-Level Voltage Outputs
  • 1500Vrms Transformer Isolation
  • Accuracy, ±0.03% of Span Typical, ±0.1% Max
  • ANSI/IEEE C37.90.1 Transient Protection
  • 120Vrms Input Protection
  • CMRR, 105dB
  • 80dB Per Decade of Attenuation Above 100Hz
  • Easy DIN Rail Mounting
  • CSA Certified, FM Approved
  • CE and ATEX Compliant

Block Diagram

Ordering
NOTE: Data in below table can be filtered. Please use the to make your selection. If you have any questions about the displayed data, please contact Customer Service at +1 520-741-1404 or sales@dataforth.com

FAQ

Custom Modules

Below is a list of existing custom modules. If you don't see a module matching your target specifications, contact Customer Service and Application Support to discuss design guidelines and design feasibility. Customer Service and Application Support can be reached at sales@dataforth.com or +1-800-444-7644.
NOTE: Data in below table can be filtered. Please use the to make your selection. If you have any questions about the displayed data, please contact Customer Service at +1 520-741-1404 or sales@dataforth.com
* ... Status Codes: PR = Production, PT = Prototypes, QU = Quoted

We want your feedback!

We are interested in your feedback regarding our products. Please let us know what you think and if you have any questions regarding the SCM5B32 and how this product could apply to your application. Your feedback is very valuable to us and very much appreciated.

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