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Plants extended over large distances, interference fields caused by power engineering systems, difficult grounding conditions or aggressive substances close to the measurement sensors the challenges in analog measurement technology for industrial applications can be manifold.

Floating measurement circuits with differential circuits must be planned in order to exclude interference from the measurement chain as much as possible. To prevent interference and damage from being transmitted from one sensor circuit to all the others, the measuring and control circuits are galvanically isolated from each other.

For this purpose, the AIO104/I module type offers the benefits of an extremely versatile multi-signal analog input/ output module combined with channel-wise galvanic isolation. Each of the 4 primary channels can be operated individually either as an analog input or output. The spectrum of the inputs ranges from current loops (4 mA to 20 mA, ±20 mA) to 4 high-impedance voltage measurement ranges (±10 V to ±10 mV), Pt100/Pt1000 temperature measurement in 2-wire, 3-wire, and 4-wire connection technology as well as thermocouples, and through to freely configurable resistance measurement. The integrated measuring range and measured value monitoring enable both sensor circuit faults as well as process alarms to be implemented easily.

Current loops can also be driven or 0 V to 10 V, ±10 V voltage signals can be output in 14 bits. Besides the 4 freely configurable primary channels, up to 4 additional I/O channels with restricted signal types are available.



  • 4-channel analog input/output module isolated
  • Up to 4 additional analog channels depending on the required signal type
  • Channel-by-channel configurable signal type and direction
  • AI current/voltage, Pt100, Pt1000, TC
  • AO current/voltage
  • Channel-wise galvanic isolation
  • Oversampling
  • Synchronous clocks

Approvals / Certificates

Marine classification in preparation


System overview