Each DSCL21 loop powered isolator provides a single channel of analog signal protection by electrically isolating its input from output for any DC process signal in the range of 0-20mA (or 4-20mA). The DSCL21 operates passively, obtaining its power from the transmitted signal.

The input signal is chopped by a proprietary DC chopper circuit, isolation is provided by transformer coupling, a proprietary technique is used to suppress transmission of common mode spikes or surges, the output signal from the secondary of the transformer is reconstructed to the original input signal.
  • No Power Supply Required, Signal Powered from 0-20mA (or 4-20mA) Input
  • Simplified Wiring for Fast Installation
  • Narrow 12.5mm DIN Package for High-Density Mounting
  • No Recalibration or Maintenance Required
  • 500Vrms Transformer Isolation
  • Prevents Ground-Loop Problems
  • Prevents the Transfer of Interference Voltages and Currents
  • High Accuracy Over Full Span
  • CE Compliant
Loop Powered Isolator - DIN Mount

DSCL21 Devices


Part Number Input RangeOutput RangeMechanical FormatInternal Power SupplyIsolation VoltageIsolation TypeAccuracySupply Voltage
0 to 20 mA 0 to 20 mA DIN rail None 500 Vrms Transformer 1-way ±0.1% Span Typical (at 100 Ohm load) Loop Powered

Frequently Asked Questions


Can Dataforth provide calibration reports for modules I purchased?
Yes we can provide calibration reports for the modules that you purchased.

You can either
a) visit https://www.dataforth.com/TestDataReport.aspx to search for Test Report Datasheets by Serial Number or
b) you can send us a list of model numbers and their serial numbers to support@dataforth.com

How does the load resistance of a module affect the noise at the output?
Noise at the output of a module is independent of load resistance.
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Dataforth offers a wide range of custom modules for those instances when our standard commercial off-the-shelf (COTS) solutions don't quite meet your specific application needs. 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.