Website:
Dataforth Corporation
Catalog excerpts
Industrial Loop Isolators and Transmitters > Description Each DSCL21 loop powered isolator provides a single channel of analogsignal protection by electrically isolating its input from output for any DC processsignal 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 isprovided by transformer coupling, a proprietary technique is used to suppresstransmission of common mode spikes or surges, the output signal from thesecondary of the transformer is reconstructed to the original input signal. Features ?No Power Supply Required, Signal Poweredfrom 0-20mA (or 4-20mA) Input?Simplified Wiring for Fast Installation ?Narrow 12.5mm DIN Package forHigh-Density Mounting?No Recalibration or Maintenance Required?500Vrms Transformer Isolation?Prevents Ground-Loop Problems ?Prevents the Transfer of Interference Voltagesand Currents?High Accuracy Over Full Span?CE Compliant The compliance voltage or loop voltage must not exceed 17V, asthis may damage the module. + 34 Figure 1: DSCL21 Block Diagram
Open the catalog to page 1
NOTES:(1) Additional error <0.2% at 500 ֢Ħ Load (I > out )(2) V > in =I > O R > L + <2V > DSCL Figure 2: DSCL21 Dimensions >
Open the catalog to page 2
