Eurotherm G408-0001 | Ultra SlimPak Signal Isolator

Description

Core Product Summary

The Eurotherm G408-0001 is a DC-powered, field-configurable signal isolator in the Ultra SlimPak series. It accepts DC voltage or current signals and produces a corresponding isolated DC output. The module is designed for industrial signal conditioning applications where electrical isolation is required between field instrumentation, control equipment, and associated power circuits.

The G408-0001 supports input ranges from 10 mV to 100 V or 1 mA to 100 mA, with selectable standard outputs including 0–5 V, 0–10 V, 0–1 mA, 0–20 mA, and 4–20 mA. Its input, output, and power circuits have 1800 VDC isolation. The unit operates from a 9–30 VDC supply and uses a compact 12.6 mm-wide DIN-rail housing. Its factory-standard configuration is 4–20 mA input to 4–20 mA output.

 

Key Technical Specifications

Parameter	Specification
Manufacturer	Eurotherm
Model	G408-0001
Product Series	Ultra SlimPak
Product Type	DC Input Field-Configurable Signal Isolator
Input Signal	DC voltage / DC current
Voltage Input Range	10 mV to 100 V
Current Input Range	1 mA to 100 mA
Voltage Output	0–5 V, 0–10 V
Current Output	0–1 mA, 0–20 mA, 4–20 mA
Factory Configuration	4–20 mA input / 4–20 mA output
Isolation	1800 VDC between input, output, and power
Supply Voltage	9–30 VDC
Power Consumption	1.5 W typical, 2.5 W maximum
Response Time	200 ms typical (10–90%)
Housing Width	12.6 mm
Mounting	DIN rail
Operating Temperature	0 to 55°C
Storage Temperature	-25 to 70°C
Humidity	15–95% non-condensing at 45°C
Electrical Connections	Screw terminals, 12–22 AWG
Weight	0.5 lb

Accuracy specifications

• For input signals below 2 mA or 20 mV: ±0.35% of full scale typical; ±0.5% maximum.
• For input signals above 2 mA or 20 mV: ±0.1% of full scale typical; ±0.2% maximum.

 

Engineering Selection Highlights

• Configurable DC input: Supports voltage inputs from 10 mV to 100 V and current inputs from 1 mA to 100 mA. This allows the module to accommodate different DC field-signal ranges.
• Multiple standard output formats: Provides voltage and current outputs, including 4–20 mA and 0–10 V, allowing integration with different receiving instruments.
• Electrical isolation: The 1800 VDC isolation between input, output, and power helps prevent unwanted electrical coupling between connected circuits.
• Compact installation: The 12.6 mm housing width supports high-density DIN-rail cabinet layouts.
• Flexible DC power: Accepts a 9–30 VDC supply, accommodating common industrial DC power arrangements.
• Adjustable signal scaling: Zero and span adjustments allow signal calibration within the supported input ranges.
• Signal monitoring: A green LED provides input-range indication, including flashing indications for signals outside specified operating limits.

System Compatibility & Integration Requirements

Item	Compatibility / Requirement	Engineering Consideration
Signal input	DC voltage or DC current	Select the input type and range according to the field transmitter signal.
Signal output	0–5 V, 0–10 V, 0–1 mA, 0–20 mA, 4–20 mA	Match the output configuration to the receiving controller or instrument.
Power supply	9–30 VDC	Confirm the supply voltage and available power capacity.
Mounting rail	TS32 or TS35 DIN rail	Select the appropriate rail and mounting accessories.
Electrical isolation	1800 VDC input/output/power isolation	Consider grounding and circuit isolation requirements during cabinet design.
Wiring	Screw terminals, 12–22 AWG	Use suitable conductors and maintain correct signal polarity.
Heat management	Horizontal DIN-rail mounting	For five or more modules on a vertical rail, circulating air or an HS01 heat sink is recommended.

Important configuration note: The G408-0001 and G408-1001 are different output variants. The G408-0001 provides standard unipolar outputs, while the G408-1001 provides bipolar voltage outputs. They should not be treated as interchangeable when checking output requirements.

 

Dimensions, Mounting & Connection Notes

The Eurotherm G408-0001 belongs to the Ultra SlimPak G-series and uses a narrow DIN-rail housing with a specified width of 12.6 mm.

Mounting requirements

• Designed for standard TS32 and TS35 DIN rails.
• MD02 is the designated TS32 mounting rail accessory.
• MD03 is the designated TS35 mounting rail accessory.
• The HS01 heat sink is included in the documented G-series accessory arrangement.
• When five or more modules are installed on a vertical rail, circulating air or an HS01 heat sink is recommended.

Electrical connection considerations

• Use screw-terminal connections compatible with 12–22 AWG conductors.
• Keep input and output wiring properly separated according to the cabinet’s electrical design.
• Shielded, twisted-pair wiring is recommended to reduce interference from electrical and magnetic fields.
• Confirm the input and output configuration before applying operating signals.

The module’s DIP-switch settings determine the selected input and output ranges. Zero and span adjustments are used for calibration after the signal configuration has been established.

 

Detailed Product Overview

DC Signal Conditioning and Conversion

The Eurotherm G408-0001 is designed to process DC voltage and current signals within an industrial control environment. Its configurable input stage accommodates a range of electrical signal levels, allowing engineers to select an appropriate input range for the connected instrumentation.

The module provides a corresponding DC output that is linear to the input. This is useful when field devices and receiving equipment operate with different signal ranges. For example, a system using a 4–20 mA transmitter can use the standard 4–20 mA configuration, while other supported input and output combinations can be selected through the module’s configuration switches and calibration adjustments.

Electrical Isolation Between Signal Circuits

One of the important characteristics of the G408-0001 is its 1800 VDC isolation between input, output, and power circuits.

In industrial cabinets, different instruments and control devices may operate with different electrical references. Signal isolation helps reduce the effects of unwanted electrical coupling and ground-loop interference. This is particularly relevant when integrating field instrumentation with control equipment through separate power and signal circuits.

The isolation specification should be considered as part of the overall electrical protection and grounding design. It does not replace appropriate wiring practices or system-level electrical protection.

Flexible Input and Output Configuration

The G408-0001 supports DC voltage inputs from 10 mV to 100 V and DC current inputs from 1 mA to 100 mA.

Its standard output options include:

• 0–5 VDC
• 0–10 VDC
• 0–1 mA
• 0–20 mA
• 4–20 mA

This configuration flexibility allows the module to serve different signal-conditioning requirements without changing the basic installation format.

The factory-standard setting is 4–20 mA input and 4–20 mA output. Other configurations require the appropriate switch selection and calibration.

DIN-Rail Installation and Cabinet Integration

The Ultra SlimPak housing has a width of 12.6 mm, making it suitable for installations where control cabinet space is limited.

The module is designed for TS32 or TS35 DIN-rail mounting. Its screw-terminal connections provide the interface for power, input, and output wiring.

Thermal conditions should be considered when installing multiple modules together. The documented installation guidance recommends circulating air or an HS01 heat sink when five or more modules are mounted on a vertical rail.

Signal Calibration and Maintenance

The G408-0001 provides adjustable zero and span settings for signal calibration. These adjustments allow the configured input range to be matched to the required output range within the module’s supported operating limits.

During commissioning or maintenance, engineers should check:

1. Whether the input signal type matches the selected configuration.
2. Whether the output range matches the receiving instrument.
3. Whether the DC supply remains within the 9–30 VDC operating range.
4. Whether the signal wiring and terminal connections are secure.
5. Whether zero and span calibration produce the expected output.
6. Whether the installation provides suitable ventilation and thermal conditions.

Correct configuration is essential when replacing an existing signal isolator or integrating the G408-0001 into an established control cabinet.

 

Applications & System Role

The Eurotherm G408-0001 performs signal conditioning and electrical isolation within an industrial instrumentation and control architecture. It is typically positioned between field-level DC signal sources and receiving equipment such as PLC analog input channels, DCS interfaces, process indicators, and monitoring instruments.

Its role is to convert a selected DC input range into a corresponding standard output while maintaining electrical isolation between the input, output, and power circuits.

Typical engineering applications include:

• PLC analog signal interfaces: Conditioning DC voltage or current signals before they enter controller analog input circuits.
• DCS instrumentation: Providing isolated DC signals for process monitoring and control interfaces.
• Process measurement systems: Transferring current or voltage signals from field instrumentation to receiving equipment.
• Control cabinet signal distribution: Supporting electrical separation between different signal circuits.
• Industrial monitoring equipment: Converting configured DC signals into standard voltage or current formats for compatible monitoring devices.

These are functional application scenarios based on the module’s documented signal-conditioning capabilities, rather than specific customer deployment claims.

 

Frequently Asked Questions

Q1: What is the Eurotherm G408-0001?

The Eurotherm G408-0001 is a DC-powered, field-configurable signal isolator from the Ultra SlimPak series. It conditions DC voltage and current signals and provides electrically isolated DC outputs.

Q2: What input signals does the G408-0001 support?

It supports DC voltage inputs from 10 mV to 100 V and DC current inputs from 1 mA to 100 mA. The input range is selected through configuration switches.

Q3: What is the standard factory configuration?

The standard factory configuration is 4–20 mA input with 4–20 mA output.

Q4: What output signals are available?

The G408-0001 supports 0–5 VDC, 0–10 VDC, 0–1 mA, 0–20 mA, and 4–20 mA outputs.

Q5: What power supply does the G408-0001 require?

It operates from a 9–30 VDC power supply. Its typical power consumption is 1.5 W, with a maximum consumption of 2.5 W.

Q6: What is the isolation rating of the G408-0001?

The module provides 1800 VDC isolation between its input, output, and power circuits.

Q7: How is the Eurotherm G408-0001 installed?

It is designed for DIN-rail mounting and supports TS32 and TS35 rails. Electrical connections are made through screw terminals.

Q8: What should be checked before replacing an existing G408-0001?

Check the complete model number, input signal type, selected input range, output configuration, supply voltage, terminal wiring, and mounting arrangement. The replacement must match the original system’s electrical and signal requirements.