1-channel Loop Powered Isolator for separation of 0(4)-20 mA Signals

The input loop-powered isolator IsoPAQ-611 provides galvanic separation for 0(4) … 20 mA standard signals, while transferring the measurement signal to the output with a high degree of accuracy.

The unit avoids interference voltage carry-over and effectively suppressing parasitic noise. The very low drop voltage of 2.3 V and the high level of accuracy work together to make the IsoPAQ-611 the first choice in system design.

Intelligent design and their consequential avoidance of highly integrated components result in extremely long service lives and reliability – without any falsification of the measurement signal.

The IsoPAQ-611 requires no additional power supply since the auxiliary power is obtained from the input signal without distorting it. This not only saves costs during installation, but also increases reliability.

  • Galvanic isolation across input and output
    Protection against erroneous measurements due to parasitic
    voltages or ground loops
  • No power supply required
    Saving costs since wiring is reduced and line influences are omitted
  • Extremely slim design
    Extremely slim casing of 6.2 mm combined with very low self heating allow tight mounting
  • Protective Separation acc. to EN 61140
    Protects service personnel and downstream devices against
    impermissibly high voltage
  • Maximum reliability
    No maintenance costs

Technical Specification


Input signal 0(4)-20 mA
Start-up current < 200 mA
Voltage drop Approx.  2.3 V at 20 mA
Overload ≤ 50 mA, 30 V


Output signal 0(4)-20 mA
Load 600 Ω
Response time T99 5 ms
Residual ripple < 10 mVrms

General Data

Transmission error < 0.1 % full scale
Load error < 0.05 % of measured value / 100 Ω load
Temperature coefficient < 100 ppm/K
Test voltage 3 kV AC, 50 Hz, 1 min. all circuits against one another
Working voltage (Basic insulation) 600 V AC/DC for overvoltage category II and pollution degree 2 acc. to EN 61010-1
Protection against electrical shock Protective separation according to EN 61140 by reinforced insulation in accordance with EN 61010-1 up to 300 V AC/DC for overvoltage category II and pollution degree 2 between all circuits.
Ambient temperature Operation
– 25 to + 70 °C (– 13 to + 158 °F)
Transport and Storage
– 40 to + 85 °C (– 40 to + 185 °F)
EMC EN 61326-1
Construction 62 x 96,5 x 107 mm , protection class IP 20, mounting on 35 mm DIN rail acc. to EN 60715
Weight Approx. 70 g

Request a quote

  • For example approvals and configuration
  • This field is for validation purposes and should be left unchanged.