Impulse DSCL21 - Manual

Industrial Loop Isolators and Transmitters DSCL
For information call 800-444-7644 164
DSCL21
Loop Powered Isolator - DIN Mount
Figure 1: DSCL21 Block Diagram
Features
• 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
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Description
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 (see Figure 1).
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.