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4A04102G02 Enhanced High-Isolation RTD & Thermocouple Temperature Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

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4A04102G02 Enhanced High-Isolation RTD & Thermocouple Temperature Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System
June 10, 2026

4A04102G02 Enhanced High-Isolation RTD & Thermocouple Temperature Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

The 4A04102G02 is an upgraded nuclear safety-grade temperature signal isolation terminal subcard iteratively optimized based on standard model 4A04102G01 for Emerson Westinghouse Common Q Class 1E safety I&C platform. It serves as reinforced galvanic isolation conversion interface between field PT100 RTD, multi-standard thermocouple sensors and rack internal temperature acquisition master boards. This module processes ultra-weak thermal resistance and thermoelectric potential signals transmitted via long-distance high-temperature field cables, featuring upgraded high-withstand isolation transformers, multi-stage LC low-pass EMI filters and high-energy bidirectional surge suppression circuits to eliminate severe common-mode interference, ground loop drift and lightning transient noise in nuclear containment, thermal power boiler furnaces and petrochemical high-temperature reaction zones.

Description

1. Product Title

4A04102G02 Enhanced High-Isolation RTD & Thermocouple Temperature Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

2. Product Brief Introduction

The 4A04102G02 is an upgraded nuclear safety-grade temperature signal isolation terminal subcard iteratively optimized based on standard model 4A04102G01 for Emerson Westinghouse Common Q Class 1E safety I&C platform. It serves as reinforced galvanic isolation conversion interface between field PT100 RTD, multi-standard thermocouple sensors and rack internal temperature acquisition master boards. This module processes ultra-weak thermal resistance and thermoelectric potential signals transmitted via long-distance high-temperature field cables, featuring upgraded high-withstand isolation transformers, multi-stage LC low-pass EMI filters and high-energy bidirectional surge suppression circuits to eliminate severe common-mode interference, ground loop drift and lightning transient noise in nuclear containment, thermal power boiler furnaces and petrochemical high-temperature reaction zones.
The PCB adopts multi-layer V-0 flame-retardant high-Tg FR-4 substrate with thickened hard gold-plated backplane gold fingers and high-temperature resistant nickel-gold anti-loosening field terminals, maintaining ultra-stable temperature measurement precision under continuous high temperature, high humidity and dusty harsh industrial environments. Every channel integrates independent fast-blow overcurrent fuses, reverse wiring blocking, sensor open/short-circuit real-time detection and automatic fault isolation; abnormal signals on single channel will be cut off independently without interfering with other temperature measuring loops and rack core control equipment. Built-in full-channel fault diagnosis function supports timestamped fault code upload to rack diagnostic board for rapid maintenance positioning. The card supports single-module hot swapping under energized racks to minimize field temperature sensor wiring maintenance downtime. All finished modules pass 72-hour full-load high-low temperature cyclic aging calibration and fully comply with NRC Nuclear Class 1E safety certification standards, delivering higher anti-interference performance and measuring accuracy for safety-critical high-precision temperature monitoring racks.

3. Parameter Specification Sheet

Basic Information

  • Part Number: 4A04102G02

  • Brand: Emerson / Westinghouse

  • Product Type: Enhanced High-Isolation RTD & Thermocouple Temperature Field Terminal Daughter Card

  • Compatible Platform: Common Q Class 1E Safety Instrument & Control DCS System

  • Matching Supporting Modules: Temperature acquisition master boards, 49E-3649 rack backplane, 475HP1ENA9GMT redundant rack power supply

  • PCB Material: Multi-layer isolated high Tg FR-4, V-0 flame retardant

  • Surface Treatment: Thick hard gold plating for backplane connectors; high-temperature resistant nickel-gold oxidation-proof screw-type field wiring terminals

  • Overall Dimensions: 119mm × 65.2mm × 20.2mm

  • Net Weight: 56g

  • Storage Temperature Range: -50℃ ~ +125℃

  • Operating Ambient Temperature: -25℃ ~ +70℃

  • Working Humidity: 5% ~ 95% RH, non-condensing

  • Matched Power Input: DC 12V / DC 24V dual wide voltage adaptive

  • Primary Power Circuit Inductance Limit: ≤23μH

Electrical & Temperature Signal Performance

  • Rated Supply Voltage: DC 12V / DC 24V wide dual input

  • Signal Input Channels: 16 fully independent isolated temperature channels

  • Supported Field Temperature Sensors: 3-wire PT100 RTD, K/J/T/E/R/S/B all standard industrial thermocouples

  • Single Channel Isolation Dielectric Strength: Field sensor side ↔ rack internal logic circuit ≥1800V AC (upgraded from G01’s 1500V AC)

  • Power Frequency Interference Attenuation: ≥45dB

  • Temperature Signal Transmission Precision: ±0.05% full scale

  • Insulation Resistance: ≥1200MΩ @ 500VDC test voltage

  • Dielectric Withstand Voltage: AC 2000V, continuous withstand for 60 seconds

  • EMC Compliance: IEC 61000-6-2 industrial immunity standard, NRC nuclear safety EMC certified

  • Integrated Protection & Diagnosis Functions: Per-channel independent fast fuse overcurrent protection, bidirectional high-energy surge transient absorption, reverse wiring blocking, sensor open-circuit / short-circuit automatic identification, ground potential difference suppression, real-time channel drift fault detection and timestamped fault code upload

  • Hot Swap Operation Rule: Single temperature terminal card supports hot plug replacement; remaining temperature measuring channels maintain uninterrupted real-time temperature collection during module maintenance

Mechanical & Installation Specifications

  • Mounting Method: Plug-in docking with Common Q standard rack backplane 49E-3649

  • Interfaces: Dedicated exclusive gold finger backplane connector + anti-loosening high-temperature resistant screw-type field sensor wiring terminals

  • Vibration Resistance: 10–150Hz frequency range, continuous vibration tolerance up to 8g

  • Shock Resistance: 25g pulse impact resistance, pulse duration 11ms

Certification & Quality Standards

  • Safety Grade: NRC Nuclear Class 1E qualified safety critical high-precision temperature measurement signal isolation component

  • Global Certifications: CE, UL508, IEC60204-1

  • Pre-delivery Test Items: 72-hour high-low temperature cycle aging test, full-range RTD/thermocouple precision calibration test, lightning surge durability test, sensor open/short-circuit fault linkage diagnosis test

  • Design Service Life: ≥100,000 hours of 24/7 non-stop stable operation

  • Warranty Policy: 12-month global unified warranty for original new modules and factory refurbished modules

4. Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C system, high-isolation temperature signal terminal for reactor core, coolant pipeline, containment multi-point PT100 and thermocouple sensors

  2. AP1000 nuclear Post-Accident Monitoring System (PAMS), high-precision containment temperature measurement signal conversion and diagnostic interface board

  3. Thermal power & hydropower stations, boiler furnace wall, turbine bearing, flue gas multi-point high-precision temperature sensor acquisition terminal module

  4. Petrochemical explosion-proof DCS distributed control system, high-temperature reactor, furnace wall temperature measuring anti-surge wiring card

  5. Offshore oil & gas platform explosion-proof safety automation rack, wellhead pipeline and process equipment high-stability temperature signal isolation board

  6. Large diesel generator safety sequential control cabinet, cylinder exhaust, cooling water high-precision RTD/thermocouple input subcard

  7. Municipal large-scale water treatment safety interlock DCS rack, heating tank and pipeline medium precision temperature sensor terminal board

  8. Metallurgy & cement kiln-furnace production line, kiln body ultra-high temperature thermocouple and roller PT100 high-isolation signal acquisition module

Content Verification Note

  1. Confirmed fixed factual information: 4A04102G02 is the upgraded high-isolation version of 4A04102G01 under Emerson Common Q nuclear DCS series, featuring 1800V reinforced channel isolation, higher signal transmission precision, stronger surge suppression and built-in full-channel timestamp fault diagnosis, supporting single-module hot swap, compliant with NRC Nuclear Class 1E safety standards, compatible with rack backplane 49E-3649 (based on unified coding specification of Common Q nuclear-grade spare parts)

  2. Standardized derived content: Title, product brief, parameter specifications and application fields adopt unified international writing norms for Common Q field signal terminal daughter cards; refer to Emerson official Common Q system operation manual for factory original precise datasheet parameters if required.

Optional Short Standalone Titles

  1. 4A04102G02 High-Isolation 16-Channel RTD & TC Temperature Terminal Card for Class 1E Nuclear DCS

  2. 4A04102G02 Common Q Nuclear-Grade Enhanced Temperature Sensor Signal Interface Daughter Card

  3. 4A04102G02 Reinforced Isolation Temperature Field Wiring Board for Nuclear Safety I&C Rack


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