WAGO 857-411 Isolation Amplifier

USD 274.54

6 mm DIN-rail current-loop isolator with 24 VDC supply, 3-way isolation, 3 kV test voltage, and 0(4)–20 mA in/out.

SKU Wago-857-411 Category
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WAGO 857-411 Isolation Amplifier

Model Identifier 857-411
Official Part Number 857-411
GTIN Standard 4045454471224

Technical Overview

6 mm DIN-rail current-loop isolator with 24 VDC supply, 3-way isolation, 3 kV test voltage, and 0(4)–20 mA in/out.

Key Features

  • 0(4) to 20 mA input and output
  • 24 VDC supply voltage
  • 3-way electrical isolation
  • 3 kV test voltage
  • 6 mm module width
  • DIN-35 rail mounting
  • Push-in terminal connection
  • Designed as a JUMPFLEX signal conditioner/isolation amplifier

3-way electrical isolation with 3 kV test voltage for analog current-loop conditioning.

Technical Specification Matrix

ParameterValue
Product typeIsolation amplifier / signal conditioner
Input signal range0(4) … 20 mA
Output signal range0(4) … 20 mA
Supply voltage24 VDC
Electrical isolation3-way
Test voltage3 kV
Module width6 mm
Mounting typeDIN-35 rail
Weight36.1 g
Height94 mm
Depth from upper edge of DIN rail97.8 mm
Input resistance (current input)≤ 50 Ω
Input current (max.)50 mA
Input voltage (max.)30 V
Operating temperature-25 … 70 °C
Storage temperature-40 … 85 °C
Relative humidity5 … 95 % (no condensation)
Operating altitude (max.)2000 m
Physical Weight (kg)0.04
Dimensions L x W x H (cm)9.7 x 0.6 x 9.4

Industrial Applications

1. PLC analog loop isolation in process skids

Used between field transmitters and PLC analog inputs to break ground loops while preserving a 4–20 mA process signal over a 24 VDC powered interface module.

Problem Solved

Prevents ground-loop errors and signal corruption in long analog current loops.

0(4)–20 mA3-way isolation3 kV test voltagePLC analog inputground loop

2. Signal conversion across control cabinet boundaries

Ideal for routing current signals between separately grounded cabinet sections where electrical isolation is required but the signal must remain current-loop compatible.

Problem Solved

Maintains signal integrity across different grounding domains.

current loopelectrical isolationDIN rail modulecontrol cabinetsignal conditioning

3. Noise-robust analog interface for industrial measurement

Appropriate for noisy industrial environments where shielded current signals need amplification and galvanic isolation before reaching controllers or recorders.

Problem Solved

Improves immunity to electrical noise and interference on analog measurement lines.

analog measurementcurrent signalgalvanic isolationEMC immunityindustrial automation
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