FIEDLER > Units for control and telemetry > Control units > External input/output modules for control units > GX200 – Current Loop Galvanic Isolation Module
GX200 – Current Loop Galvanic Isolation Module
External input/output modules for control units

GX200 – Current Loop Galvanic Isolation Module

A galvanic isolation module for 0–20 mA and 4–20 mA current signals that does not require an external power supply, designed for two-wire transducers.

  • 0/4–20 mA signal transmission at a 1:1 ratio
  • Power transmission for a two-wire transducer
  • Low voltage drop across the module: typically 3.5 V
  • Input operating voltage range: 3.5 to 30 V
  • Test voltage: 4,000 V
  • Conversion accuracy: < 0.2%
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Description

The GX200 module is used for galvanic isolation of standard 0–20 mA and 4–20 mA current signals without the need for an auxiliary power supply. It draws power for its own operation directly from the input measurement signal, making it particularly suitable for isolating two-wire transducers powered via a 4–20 mA signal loop.
Galvanic isolation is achieved by a transformer—the input DC signal is modulated into AC and, after transmission, demodulated back into DC. The input circuit is protected against interference voltages, reverse polarity, and current overload.

Applications

  • Galvanic isolation of 0–20 mA and 4–20 mA current loops in measurement and control systems
  • Isolation of two-wire transmitters powered directly from the 4–20 mA signal loop
  • Suppression of interference, ground loops, and potential differences between devices
  • Enhanced protection of input circuits in higher-level systems (PLCs, data loggers, controllers)

Technical specifications

Technical Specifications Value
Input Signal 0–20 mA/4–20 mA
Conversion Ratio 1 : 1
Maximum supply voltage 36 V
Maximum operating current 30 mA
Overload protection Resettable PTC thermal fuse (200 mA)
Max. transmission error < 0.2%
Temperature error < 0.002% / °C
Test voltage 4000 V rms
Time constant < 0.1 s
Operating temperature range −25 to +80 °C
Storage temperature range −40 to +80 °C
Mounting 35 mm DIN rail
Dimensions (W × H × D) 70 × 45 × 44 mm
Weight 120 g

Downloads

Price List Cenik 2026 V101 Gx200

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GX200 – Current Loop Galvanic Isolation Module



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