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Isolated Standard Signal Conditioner

VariTrans A 21000

The VariTrans A 21000 isolates, transmits and converts 0 to 20/4 to 20 mA and 0 to 10 V with a high level of accuracy. In spite of its modular housing being only 6 mm wide, the new VariTrans isolation amplifier provides maximum protection of personnel and equipment through protective separation up to a working voltage of 300 V conforming to EN 61140. The test voltage is 2.5 kV AC. It can be supplied with either 24 V DC or 230 V AC.


  • Broad-range power supply 24 to 110 V DC / 110 to 230 V AC
  • 3-port isolation: prevention of incorrect measurements caused by potential differences
  • Protective separation up to 300 V AC/DC according to EN 61140
  • High isolation -2.5 kV AC test voltage
  • Long service life
  • Extremely low failure rate due to reduced self-heating
  • Cost reduction through smaller enclosures (Closely packed
    mounting of the ultra-compact housings allows for
    more channels per meter DIN rail)
  • High accuracy and temperature stability
  • Gain error 0.2 % meas. val. and temperature coefficient 0.01 %/K
  • Calibrated range selection without complicated adjustments
  • Easy installation
  • Simple connection to the power supply via the DIN rail bus connector
  • UL approval for use in North America
  • Adjustable or fixed-range models
  • Best price/performance ratio

5-year warranty

Contact Us
Phone: +49 30 80191-0
Fax: +49 30 80191-200
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