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Eaton MTL Resistance Isolator | MTL5582B | Single Channel | RTD Signal Repeater

Eaton MTL5582B single channel resistance isolator, galvanically isolates and repeats 2/3/4-wire RTD signals (Pt100, 10~400Ω) from hazardous area to safe area monitoring systems, 20~35VDC supply, 3-port isolation, SIL1 functional safety, ATEX/IECEx certified, Zone 0/IIC/T4, DIN rail mount, UK manufacture. Order available.

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Product Details

1. Product Overview

The Eaton MTL5582B is a single channel Resistance Isolator manufactured by MTL Instruments of the UK (now part of Eaton Crouse-Hinds series, USA), used to galvanically isolate resistance temperature device (RTD) signals or other resistance signals from hazardous areas and repeat them as resistance signals to monitoring systems in safe areas. The module is typically used with Pt100 3-wire RTDs, and also supports 2-wire and 4-wire RTD connections, user-selectable via switches on the module (factory default 3-wire).

In industrial processes with explosive gas hazardous environments such as oil, petrochemical, natural gas, and pharmaceutical industries, field temperature measurement typically uses RTD sensors. These sensors are installed in hazardous areas (Zone 0/1/2), and their signals need to be transmitted to control systems (DCS/PLC) located in safe areas for display, recording, and control. Since explosive gas mixtures exist in hazardous areas, directly connecting field signals to safe-area equipment may pose the risk of electric sparks igniting hazardous gases. The function of an isolated barrier (isolator) is to provide electrical isolation between hazardous and safe areas, while limiting the energy transferred to the hazardous area, ensuring that even under fault conditions, no electric spark or thermal effect sufficient to ignite explosive gases is produced, thereby achieving intrinsic safety explosion protection.

The MTL5582B adopts 3-port isolation design, where input (hazardous area RTD signal), output (safe area resistance signal), and power supply (20~35VDC) are galvanically isolated from each other. Three-port isolation effectively eliminates ground loop interference, prevents common-mode interference caused by potential differences between different grounding points, and improves signal transmission anti-interference capability and measurement accuracy. At the same time, electrical isolation also protects expensive safe-area control equipment from overvoltage, surges, and lightning strikes, improving the reliability and safety of the entire system.

The input side of this isolator supports 2-wire, 3-wire, or 4-wire RTD connections, conforming to BS 1904 / DIN 43760 standards (100Ω at 0°C), with a resistance measurement range of 10Ω to 400Ω. The RTD excitation current is 200μA (nominal), and low excitation current effectively reduces measurement errors caused by RTD self-heating (self-heating effect). Users can select 2-wire, 3-wire, or 4-wire connection via DIP switches on the module, with factory default set to 3-wire (the most commonly used Pt100 wiring method). Three-wire connection can compensate for measurement errors caused by lead resistance, and is the most commonly used RTD wiring method in industrial fields.

The output side also supports 2-wire, 3-wire, or 4-wire resistance signal output, with an output range of 10Ω to 400Ω, driven by a 100μA to 5mA current source. The number of wires on the safe-area side is independent of the number of wires selected on the hazardous-area side, meaning the hazardous area can use 3-wire RTD input while the safe area can use 2-wire or 4-wire output, flexibly adapting to different receiving instrument requirements. The output signal directly repeats the input RTD resistance value in resistance form, and receiving instruments (such as temperature transmitters, DCS analog input cards, temperature indicators, etc.) can receive this resistance signal as if directly connected to an RTD, without additional signal conversion or configuration, making it very convenient to use.

The MTL5582B features open circuit detection and safe drive functionality. When the hazardous area RTD sensor experiences an open circuit fault (such as sensor damage, wiring disconnection), the module output will drive to the upscale value (approximately 420Ω nominal), causing the safe-area receiving instrument to detect an over-range signal, thereby triggering an alarm or interlock protection action to ensure process safety. This "upscale" fault-safe design conforms to industrial process safety conventions, enabling operators to promptly detect sensor faults and take measures.

In terms of transfer accuracy, the MTL5582B has a transfer accuracy of better than 0.15Ω (at excitation current 1~5mA) and 0.25Ω (at excitation current 0.5~1mA) at 20°C ambient temperature, with a temperature drift of ±10mΩ/°C (typical, equivalent to 0.01%/°C at 100Ω), and a response time within 1 second to reach within 4% of the final value. These performance indicators ensure high-precision, high-stability, and fast-response transmission of temperature signals, meeting industrial process control requirements for temperature measurement accuracy and response speed.

This module has passed ATEX and IECEx explosion protection certifications, suitable for Zone 0 (areas where explosive gas is continuously present), IIC (most hazardous gas groups such as hydrogen, acetylene), T4 (maximum surface temperature 135°C) hazardous areas, as well as North American standard Div. 1, Group A hazardous locations. At the same time, this module has passed SIL 1 functional safety certification (IEC 61508), and can be used in functional safety applications with Safety Integrity Level SIL 1, such as temperature monitoring and interlock protection in Safety Instrumented Systems (SIS). The module has also passed FSM (Functional Safety Management) certification, indicating that its development and production processes comply with functional safety management system requirements.

The MTL5582B adopts DIN rail mounting method, with compact module volume and high mounting density, can be conveniently installed on standard DIN rails (EN 50022 / 35mm), suitable for dense installation in control cabinets, safety barrier cabinets, and field junction boxes. The module uses screw terminal wiring, which is firm and reliable, facilitating field maintenance. A green LED indicator is used for power status indication, facilitating field commissioning and fault diagnosis. The module supply voltage is 20~35VDC (typical 24VDC), with low power consumption (max 0.8W at 24V, max 1.0W at 35V), suitable for heat dissipation and power supply design during large-scale dense installation.

The MTL5582B is the upgraded replacement model for the MTL5582. The MTL5582 has been superseded by the MTL5582B for all applications requiring ATEX or IECEx certifications. The MTL5582 should only be selected for applications requiring North American certifications (FM/CSA). For new projects and applications requiring European/international explosion protection certifications, the MTL5582B should be selected.

This resistance isolator is widely used in the following industrial applications: temperature measurement and control in petrochemical plants (refineries, chemical plants, petrochemical complexes), natural gas processing and transmission facilities (gas purification plants, gas transmission stations, LNG receiving terminals), pharmaceutical and fine chemical production processes, temperature monitoring in oil depots and tank farms, offshore oil platforms and FPSOs, coal chemical and fertilizer plants, industrial boiler and furnace temperature control, refrigeration and air conditioning system temperature monitoring, food and beverage production process temperature control, water treatment and wastewater treatment plant temperature monitoring, etc. In these applications, the MTL5582B ensures safe, accurate, and reliable transmission of hazardous area temperature signals to safe-area control systems, serving as an important interface device in intrinsic safety explosion protection systems.

Note: This product MTL5582B is an Eaton MTL brand single channel resistance isolator. The above technical parameters are from Eaton official data sheet (crouse-hinds-mtl5582-b-resistance-isolator-datasheet.pdf) and MTL5500 series official manual, with accurate and reliable parameters. Installation and wiring must be performed by professional engineers with explosion-proof electrical operation qualifications, strictly following Eaton MTL installation manual and intrinsic safety explosion protection system design specifications. The explosion protection parameters (Uo/Io/Po/Um) of hazardous area equipment must match the explosion protection parameters of field equipment to ensure the explosion protection effectiveness of the entire IS loop. The IS parameters of the module (terminals 1 and 3: Uo=1.2V, Io=4mA, Po=1.2mW, Um=253V; terminals 1/3/4/5: Uo=6.51V, Io=10mA, Po=17mW) must be compared and confirmed with the explosion protection parameters of field RTD sensors during system design.

2. Specifications

表格

Parameter	Value
Brand	Eaton (USA multinational industrial group) / MTL Instruments (UK MTL company, now part of Eaton Crouse-Hinds series)
Product Series	MTL5500 series DIN rail mounted isolated barriers
Model	MTL5582B
Product Type	Resistance Isolator, to repeat RTD signals
Number of Channels	1 (single channel)
Input Signal Type	2-, 3-, or 4-wire RTD or other resistance signals
RTD Standard	BS 1904 / DIN 43760 (100Ω at 0°C, Pt100)
Input Resistance Range	10Ω to 400Ω
RTD Excitation Current	200μA nominal
Wiring Selection	User selectable via DIP switches (2/3/4-wire), factory default 3-wire
Output Signal Type	Resistance signal repeat (2-, 3-, or 4-wire output)
Output Resistance Range	10Ω to 400Ω (from 100μA to 5mA source)
Output Wiring	Independent of input wiring selection (2/3/4-wire optional)
Transfer Accuracy @20°C	<0.15Ω (excitation current 1~5mA); <0.25Ω (excitation current 0.5~1mA)
Temperature Drift	±10mΩ/°C typical (0.01%/°C @ 100Ω)
Response Time	Within 4% of final value within 1s
Open Circuit Safe Drive	Upscale to approximately 420Ω nominal, triggering over-range alarm
Isolation Method	3-port isolation (input/output/power mutually isolated)
Isolation Voltage	Contact via email (subject to Eaton official data sheet, reference 250VAC basic insulation)
LED Indicator	Green, power status indication
Supply Voltage (Vs)	20 to 35VDC (typical 24VDC)
Supply Current	33mA @ 24V; 35mA @ 20V; 28mA @ 35V
Maximum Power Dissipation	0.8W @ 24V; 1.0W @ 35V
IS Parameters (terminals 1 and 3)	Uo=1.2V, Io=4mA, Po=1.2mW, Um=253V rms or dc
IS Parameters (terminals 1/3/4/5)	Uo=6.51V, Io=10mA, Po=17mW
Non-energy-storing Apparatus	≤1.5V, ≤0.1A, ≤25mW; can be connected without further certification into any IS loop with open circuit voltage <5V
Hazardous Area Suitability	Zone 0, IIC, T4; Div. 1, Group A
Explosion Protection Certifications	ATEX Approved, IECEx (Contact via email for certificate numbers)
Explosion Protection Marking	[Ex ia Ga] IIC (reference, subject to official certificate)
Functional Safety Certification	SIL 1 capable (IEC 61508), FSM Approved
Operating Temperature	-20°C to +60°C
Storage Temperature	Contact via email (subject to Eaton official data sheet, reference -40°C to +85°C)
Relative Humidity	Contact via email (subject to Eaton official data sheet, reference 5% to 95% RH non-condensing)
Mounting Method	DIN rail mounting (EN 50022 / 35mm standard rail)
Terminal Type	Screw terminals
Wire Gauge	Contact via email (subject to Eaton official data sheet, reference 0.5 to 2.5mm²)
Protection Degree	IP20 (cabinet installation, reference, subject to official)
Enclosure Material	Contact via email (subject to Eaton official data sheet)
Module Width	Contact via email (MTL5500 series standard width, reference approx. 16.5mm)
Dimensions	Contact via email (subject to Eaton official data sheet)
Weight	Contact via email (subject to Eaton official data sheet, reference approx. 80g)
Origin	United Kingdom
Replacement Relationship	MTL5582B replaces MTL5582 (for ATEX/IECEx certified applications)
North American Certified Model	MTL5582 (for FM/CSA North American certified applications)
Matching Power Supply	Requires external 24VDC barrier power supply (user-supplied or matching)
Matching Rail	Standard 35mm DIN rail (user-supplied)
Minimum Order Quantity	1 unit
HS Code	85389099
Stock Status	Order available
Warranty	12 months

5. Model Explanation

Model: MTL5582B

Product Description: Eaton MTL single channel resistance isolator, galvanically isolates and repeats 2/3/4-wire RTD signals (Pt100, 10~400Ω) from hazardous area to safe area monitoring systems, 20~35VDC supply, 3-port isolation, SIL1 functional safety, ATEX/IECEx certified, Zone 0/IIC/T4, DIN rail mount, UK manufacture

MTL5582B Model Overview:

MTL = Brand series identifier (MTL Instruments, UK professional manufacturer of intrinsic safety explosion protection equipment, now part of Eaton Crouse-Hinds series)
5500 = Product series number (MTL5500 series DIN rail mounted isolated barriers)
82 = Product function code (Resistance Isolator, RTD signal repeater)
B = Version identifier (B version, supports ATEX/IECEx certification and SIL1 functional safety, replaces original MTL5582)
Channels: 1 (single channel)
Input: 2/3/4-wire RTD, 10~400Ω
Output: Resistance signal repeat, 10~400Ω
Supply: 20~35VDC
Isolation: 3-port isolation
Certifications: ATEX/IECEx explosion protection, SIL1 functional safety
Mounting: DIN rail
Origin: United Kingdom

Note: The meanings of each segment in the above model are inferred based on MTL naming conventions. Specific naming rules are subject to Eaton MTL official technical documentation; Contact via email for confirmation.

Difference between MTL5582B and MTL5582:

表格

Comparison	MTL5582B	MTL5582
Explosion Protection Certification	ATEX / IECEx	FM / CSA (North American certification)
Functional Safety	SIL 1 capable, FSM Approved	No SIL certification
Applicable Regions	Europe, Middle East, Asia-Pacific, international projects	North America (USA, Canada)
Status	Current recommended model	Superseded by MTL5582B (retained only for North American applications)
Technical Parameters	Basically consistent with MTL5582	Basically consistent with MTL5582B

MTL5500 Series Related Models (ordered separately, Contact via email):

表格

Model	Function Description
MTL5541	Single channel 4/20mA loop-powered isolated driver
MTL5544	Dual channel 4/20mA loop-powered isolated driver
MTL5546	Single channel 4/20mA repeating isolator
MTL5575	Single channel configurable temperature transmitter (RTD/TC/mV, 4/20mA output)
MTL5581	Single channel millivolt/thermocouple isolator
MTL5582B	Single channel resistance isolator (RTD signal repeater) — this product
MTL5511	Single channel digital input isolator (NAMUR)
MTL5513	Single channel digital output isolated driver
MTL5521	Single channel solenoid valve/alarm driver
MTL5525	Single channel 4/20mA loop-powered isolator (HART compatible)

Official Documentation Reference:

Eaton MTL5582B Resistance Isolator Official Data Sheet (crouse-hinds-mtl5582-b-resistance-isolator-datasheet.pdf)
Eaton Crouse-Hinds MTL5500 Series Isolated Barriers Installation and Operation Manual (MTL5501-SR etc.)
Eaton MTL5582B SIL Functional Safety Manual
Eaton MTL5582B ATEX/IECEx Explosion Protection Certificate
Eaton MTL5500 Series Product Catalog

6. Why Choose Us

Professional Procurement, Genuine Eaton MTL Quality Guaranteed — All Eaton MTL isolated barriers and explosion protection instruments obtained through professional procurement channels, ensuring genuine Eaton MTL original products, with product identification, factory inspection certificates, explosion protection certificate copies, and technical documentation, 12-month quality warranty. Pre-shipment appearance inspection, model confirmation, explosion protection parameter verification, power-on test (power indication, input/output signal test), insulation resistance test, and packaging check performed.
Worldwide Delivery, Professional Industrial Instrument Logistics — DHL/FedEx/UPS international courier and sea/air freight available, global delivery available. Isolated barriers and other precision industrial instruments use shock-proof moisture-proof anti-static professional packaging (anti-static bag + foam cushioning + desiccant + corrugated box), ensuring safe transport. Expedited logistics and customs clearance available, delivery to 200+ countries, meeting urgent project and equipment maintenance needs.
Professional Technical Support, Explosion Protection System Full-process Service — Isolated barrier selection consultation (confirming field RTD sensor model, wiring method, explosion protection parameters, hazardous area classification, receiving instrument type, IS loop parameter matching calculation), installation guidance (DIN rail mounting specifications, terminal wiring diagrams, 2/3/4-wire RTD wiring selection, DIP switch settings, power wiring, grounding requirements), system commissioning (RTD signal test, transfer accuracy calibration, open circuit alarm test, LED indicator check, IS loop verification), fault analysis (no output troubleshooting, signal drift diagnosis, LED off handling, false open circuit alarm analysis, IS parameter mismatch handling, explosion protection certificate validity check, spare parts replacement guidance), and explosion protection system spare parts list review, helping users correctly select, install and maintain intrinsic safety explosion protection systems.
Flexible Procurement, Project Bulk and Spare Parts Framework Agreements — Single unit and bulk project orders, tiered discounts. Complete explosion protection system package solutions available (barrier + RTD sensor + temperature transmitter + barrier power supply + DIN rail + junction box + explosion protection certificate combination) and annual spare parts framework agreements, helping users optimize procurement cost, ensure spare parts supply, minimize equipment downtime risk. Customized quotations and long-term cooperation solutions available for oil, petrochemical, natural gas, pharmaceutical, offshore platforms, coal chemical, power, and other industry users.
Pre-shipment Verification, Test Report Available — Appearance, packaging, model, explosion protection certificate checks before shipment; isolator test report available if necessary (appearance inspection, model and silkscreen verification, explosion protection certificate copy, power-on test (power LED indication), input/output resistance signal test, transfer accuracy measurement, insulation resistance test, open circuit alarm function test, DIP switch function verification, packaging check, accessory inventory), ensuring delivered product in good condition, parameters qualified, explosion protection documents complete. For urgent project needs (plant maintenance, barrier fault replacement, project commissioning, system modification and upgrade), priority inventory coordination and expedited shipping available.

7. Frequently Asked Questions (FAQ)

Q1: What is Eaton MTL5582B? What are the main parameters?

A: Eaton MTL5582B is a single channel Resistance Isolator manufactured by MTL Instruments of the UK (now part of Eaton Crouse-Hinds series, USA), used to galvanically isolate RTD signals or other resistance signals from hazardous areas and repeat them as resistance signals to monitoring systems in safe areas.

Core parameters: Brand Eaton/MTL Instruments, model MTL5582B, product type Resistance Isolator (RTD signal repeater), 1 channel, input 2/3/4-wire RTD conforming to BS 1904/DIN 43760 (Pt100, 100Ω at 0°C), input resistance range 10~400Ω, RTD excitation current 200μA nominal, output resistance signal repeat 10~400Ω (2/3/4-wire output optional, independent of input wiring), transfer accuracy <0.15Ω@20°C (1~5mA), temperature drift ±10mΩ/°C, response time <1s to 4%, open circuit detection upscale to ~420Ω, 3-port isolation, supply 20~35VDC, max power 0.8W@24V, IS parameters (terminals 1/3: Uo=1.2V/Io=4mA/Po=1.2mW/Um=253V; terminals 1/3/4/5: Uo=6.51V/Io=10mA/Po=17mW), hazardous area Zone 0/IIC/T4, ATEX/IECEx certified, SIL1 capable, operating temp -20~+60°C, DIN rail mount, screw terminals, green LED power indication, origin UK.

Main applications: Temperature measurement and control in petrochemical plants, natural gas processing and transmission facilities, pharmaceutical and fine chemical production, oil depots and tank farms, offshore oil platforms and FPSOs, coal chemical and fertilizer plants, industrial boilers and furnaces, refrigeration and air conditioning, food and beverage production, water treatment and wastewater plants.

Note: MTL5582B is the upgraded replacement for MTL5582, for all applications requiring ATEX or IECEx certifications. MTL5582 is only for North American FM/CSA certified applications. The IS parameters of this product must be matched and calculated with the explosion protection parameters of field RTD sensors to ensure the explosion protection effectiveness of the entire IS loop. Installation and wiring must be performed by professional engineers with explosion-proof electrical operation qualifications.

Q2: What is the difference between isolated barriers and zener barriers? How to choose?

A: Isolated barriers (isolators) and zener barriers (zener diode barriers) are two common intrinsic safety explosion protection interface devices, each with advantages and disadvantages, suitable for different applications.

Isolated barrier features:

Electrical isolation: Input, output, and power are galvanically isolated via transformer or optocoupler, 3-port isolation, effectively eliminating ground loop interference
No barrier ground required: Isolated barriers do not require dedicated barrier grounding (IS ground), simpler installation and maintenance
Strong signal conversion and processing capability: Can achieve signal conversion (such as RTD to 4/20mA, thermocouple to 4/20mA), signal amplification, linearization, cold junction compensation, etc.
Strong anti-interference capability: Electrical isolation effectively suppresses common-mode interference, electromagnetic interference, and RF interference, high signal transmission quality
Strong driving capability: Output side can drive longer cables and higher loads, suitable for long-distance transmission
Small size, high mounting density: Modern isolated barriers adopt modular design, compact size, DIN rail mounting, high mounting density
Higher power consumption: Due to internal DC/DC power supply and isolation circuits, power consumption is usually higher than zener barriers
Higher cost: Unit price is usually higher than zener barriers
Requires external power supply: Most isolated barriers require external 24VDC power supply (except loop-powered types)

Zener barrier features:

Simple structure: Composed of zener diodes, current-limiting resistors, and fuses, simple structure, high reliability
Low cost: Unit price is usually lower than isolated barriers
No external power supply required: Zener barriers are passive devices, no external power supply needed
Low power consumption: Very low self-power consumption
Requires barrier grounding: Zener barriers must be connected to dedicated IS grounding (barrier ground), grounding resistance required ≤1Ω, high installation and maintenance requirements
No signal conversion function: Can only limit energy, cannot perform signal conversion, amplification, or processing
Ground loop risk: Since safe side and hazardous side share ground, ground loop interference may exist
Limited driving capability: Output current and voltage are limited, not suitable for long-distance transmission and high loads
Larger size: Traditional zener barriers are larger, lower mounting density

How to choose:

Need signal conversion or processing (RTD/TC to 4/20mA, amplification, linearization) → Select isolated barriers
Severe field interference (near VFDs, motors, high-power equipment) → Select isolated barriers, strong anti-interference
Long-distance signal transmission → Select isolated barriers, strong driving capability
Limited installation space, high mounting density required → Select isolated barriers, small size
Limited budget, simple analog signals → Can select zener barriers, low cost
Cannot provide IS grounding (mobile equipment, temporary installations) → Select isolated barriers, no barrier ground required
Passive loop, cannot provide external power → Can select zener barriers or loop-powered isolated barriers
Functional safety applications (SIL) → Select SIL-certified isolated barriers (such as MTL5582B, SIL1 capable)
Large-scale systems, many channels → Comprehensively consider cost, power consumption, heat dissipation, and installation space; isolated barriers are usually more suitable for modern large-scale systems

Eaton MTL5582B is an isolated barrier (resistance isolator), with 3-port isolation, no barrier ground required, signal repeat transmission, SIL1 functional safety certification, compact DIN rail mounting, suitable for hazardous area RTD temperature signal isolation transmission in oil, petrochemical, natural gas, pharmaceutical, and other industries. To confirm suitability for your application, please provide field RTD sensor model, explosion protection parameters, hazardous area classification, receiving instrument type, cable length, and environmental conditions; Contact via email, we can assist in confirming selection and IS loop parameter matching calculation.

Q3: What is the difference between 2-wire, 3-wire, and 4-wire RTD wiring? How to choose?

A: RTD temperature sensor wiring methods mainly include 2-wire, 3-wire, and 4-wire, differing in lead resistance compensation methods and measurement accuracy.

2-wire:

Simplest structure, only two leads connecting RTD sensor
Lead resistance is included in RTD measurement value, cannot compensate for measurement errors caused by lead resistance
Larger measurement error, longer leads mean larger error (typically each 1Ω lead resistance causes about 2.5°C error for Pt100)
Suitable for very short leads (cabinet wiring, close-range installation), low accuracy requirements
Lowest cost, simplest wiring

3-wire:

Three leads connecting RTD sensor, two for current loop, one for voltage measurement
Through bridge principle, can compensate for equal resistance in two leads (assuming two lead resistances are equal), effectively eliminating most lead resistance errors
Higher measurement accuracy, most commonly used RTD wiring method in industrial fields
Suitable for medium distances (typically lead length ≤100m), industrial process control with higher accuracy requirements
MTL5582B factory default set to 3-wire
Moderate cost, relatively simple wiring

4-wire:

Four leads connecting RTD sensor, two for constant current source supply, two for voltage measurement (Kelvin connection)
Completely eliminates measurement errors caused by lead resistance, highest measurement accuracy
Suitable for high-precision measurement applications (laboratory metrology, precision temperature control, standard temperature transfer)
Lead length has minimal impact on measurement accuracy, suitable for long-distance high-precision transmission
Highest cost, most complex wiring

MTL5582B wiring selection:

MTL5582B supports 2-wire, 3-wire, 4-wire input, user selectable via DIP switches on module
Factory default set to 3-wire (most commonly used industrial wiring method)
Input side and output side wire counts can be independently selected, i.e., input can use 3-wire while output can use 2-wire or 4-wire
When selecting wiring method, should determine based on actual wiring method of field RTD sensor and requirements of receiving instrument

How to choose:

Industrial process control, routine temperature measurement → Select 3-wire, best balance of accuracy and cost, MTL5582B factory default
High-precision measurement, laboratory metrology → Select 4-wire, completely eliminates lead errors
Close-range installation, cabinet wiring, low accuracy requirements → Can select 2-wire, lowest cost
Long-distance transmission (>100m) → Select 3-wire or 4-wire, 2-wire error is too large
Existing RTD sensor in field → Select corresponding method based on actual wire count of sensor
Receiving instrument requirements → Output side wiring method selected based on safe-area receiving instrument input requirements

Note: The premise of 3-wire compensation is that the three leads have equal resistance (same wire gauge, same length, same material). If the three lead resistances differ significantly, 3-wire compensation effectiveness will decrease. 4-wire is not affected by lead resistance differences, with highest accuracy. The DIP switch setting of MTL5582B must be consistent with the actual wiring method, otherwise it will cause measurement errors or no output.

Q4: In stock? Lead time? Price?

A: Currently Order Available. Specific stock of Eaton MTL isolated barriers fluctuates with market.

Lead time: Standard 2-6 weeks (MTL5500 series barriers are commonly used industrial automation products, some common models may be in stock, specific subject to formal quotation).
Price: Subject to formal quotation, depends on specific model, quantity, supply channel, whether includes technical service and on-site commissioning support, etc. Bulk procurement enjoys tiered discounts.
Package solutions: Complete explosion protection system package solutions available (barrier + RTD sensor + temperature transmitter + barrier power supply + DIN rail + junction box + explosion protection certificate combination), combined procurement price more favorable. If the project requires RTD sensors and barrier power supply, it is recommended to purchase at the same time.
Expedited service: For urgent needs (plant maintenance, barrier fault replacement, project commissioning, system modification and upgrade), we can try to coordinate stock or expedited ordering, please contact sales team.
Please indicate: required quantity, desired delivery time and destination, field RTD sensor model and wiring method, hazardous area classification and explosion protection requirements, receiving instrument type, whether matching RTD sensors and power supply needed, whether installation commissioning and technical support services needed when inquiring; we will coordinate fastest delivery and optimal price.

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