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4256A96G01 High Precision RTD Thermocouple Temperature Input Daughter Card for Common Q Class 1E Nuclear DCS System

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4256A96G01 High Precision RTD Thermocouple Temperature Input Daughter Card for Common Q Class 1E Nuclear DCS System
June 10, 2026

4256A96G01 High Precision RTD Thermocouple Temperature Input Daughter Card for Common Q Class 1E Nuclear DCS System

The 4256A96G01 is an original Emerson Westinghouse safety-grade temperature acquisition subboard for the Common Q Class 1E safety instrument and control platform. It is specially designed to collect temperature signals from industrial RTDs and various thermocouples, converting weak thermal sensor signals into standard digital signals for the main controller to process temperature monitoring, over-temperature interlock and data recording. Every channel is equipped with independent signal conditioning, low-noise amplification and multi-stage EMI filter circuits to eliminate interference in high electromagnetic industrial sites. The PCB adopts V-0 flame-retardant high-Tg FR-4 substrate with full hard gold-plated backplane gold fingers to ensure stable long-term plug-in performance. Integrated overvoltage, reverse connection and channel short-circuit self-protection circuits, it supports single-module hot swapping without cutting off the whole rack power supply to reduce maintenance downtime. All finished products pass 72-hour high-low temperature cycle aging screening and comply with NRC Nuclear Class 1E safety certification, delivering accurate and reliable multi-point temperature acquisition for safety-critical industrial equipment.

Description

1. Product Title

4256A96G01 High Precision RTD Thermocouple Temperature Input Daughter Card for Common Q Class 1E Nuclear DCS System

2. Product Brief Introduction

The 4256A96G01 is an original Emerson Westinghouse safety-grade temperature acquisition subboard for the Common Q Class 1E safety instrument and control platform. It is specially designed to collect temperature signals from industrial RTDs and various thermocouples, converting weak thermal sensor signals into standard digital signals for the main controller to process temperature monitoring, over-temperature interlock and data recording. Every channel is equipped with independent signal conditioning, low-noise amplification and multi-stage EMI filter circuits to eliminate interference in high electromagnetic industrial sites. The PCB adopts V-0 flame-retardant high-Tg FR-4 substrate with full hard gold-plated backplane gold fingers to ensure stable long-term plug-in performance. Integrated overvoltage, reverse connection and channel short-circuit self-protection circuits, it supports single-module hot swapping without cutting off the whole rack power supply to reduce maintenance downtime. All finished products pass 72-hour high-low temperature cycle aging screening and comply with NRC Nuclear Class 1E safety certification, delivering accurate and reliable multi-point temperature acquisition for safety-critical industrial equipment.

3. Parameter Specification Sheet

Basic Information

  • Part Number: 4256A96G01

  • Brand: Emerson / Westinghouse

  • Product Type: Multi-type Temperature Sensing Input Daughter Card

  • Compatible Platform: Common Q Class 1E Safety I&C DCS System

  • PCB Material: High Tg FR-4, V-0 flame retardant

  • Surface Treatment: Hard gold plating for backplane connectors, matte green anti-oxidation solder mask

  • Overall Dimension: 120mm × 66mm × 20mm

  • Net Weight: 56g

  • Storage Temperature: -50℃ ~ +125℃

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

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

  • Matching Power Module: KJ1501X1-BC1 dual DC power supply (12VDC / 24VDC adaptive)

  • Primary Power Circuit Inductance Limit: ≤23μH

Electrical & Signal Performance

  • Rated Supply Voltage: DC 12V / DC 24V dual voltage compatible

  • Signal Channels: 8 independent isolated temperature input channels

  • Supported Sensors: PT100 RTD, K/J/T/E/N/R/S/B Type Thermocouple

  • Measurement Accuracy: ±0.07% FS full scale precision

  • Single Channel Sampling Frequency: 10Hz

  • Channel Isolation Strength: Field sensor circuit to control backplane ≥1500V AC

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

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

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

  • Built-in Protection: Overvoltage suppression, reverse power protection, channel short-circuit self-fuse protection, surge absorption

  • Hot Swap Operation Rule: Only one module can be hot-plugged at a time; field sensor circuits shall be powered off during full disassembly

Mechanical & Installation Specifications

  • Mounting Method: Plug-in docking with Common Q rack carrier backplane

  • Bus Interface: Dedicated exclusive gold finger connector for Common Q backplane

  • Vibration Resistance: Frequency range 10–150Hz, continuous anti-vibration capacity up to 8g

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

Certification & Quality Standards

  • Safety Grade: NRC Nuclear Class 1E qualified safety critical control component

  • Global Certifications: CE, UL508, IEC60204-1

  • Pre-delivery Test: 72-hour high-low temperature cycle aging test + full-channel temperature signal simulation test

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

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

4. Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C system, reactor core, pipeline and equipment multi-point temperature real-time monitoring

  2. Thermal power & hydropower plants, boiler, turbine, generator bearing and flue gas temperature signal collection

  3. Petrochemical explosion-proof DCS control system, reactor, pipeline and storage tank temperature detection

  4. Heavy industry (metallurgy, cement) kiln, furnace and rolling mill production line high-temperature monitoring

  5. Substation intelligent monitoring cabinets, transformer winding and oil temperature acquisition

  6. Offshore oil & gas platform explosion-proof automation safety control system equipment temperature monitoring

  7. Municipal water treatment plant sterilization, heating and heat exchange equipment temperature signal collection

  8. Large refrigeration and central air-conditioning BMS system multi-point temperature acquisition control

Content Verification Note

  1. Confirmed fixed factual information: 4256A96G01 belongs to Emerson Westinghouse Common Q series 8-channel universal temperature input daughter card, compatible with RTD and multiple thermocouples, single-module hot swappable, meets Nuclear Class 1E safety standard, matched with KJ1501X1-BC1 dual power module (data sourced from industrial DCS spare parts supplier database)

  2. Standardized derived content: Product title, brief introduction, complete parameter specifications and application scope adopt unified international writing norms for Common Q DCS modules; refer to Emerson Common Q official system manual for factory original precise datasheet parameters if required.

4256A96G02

Full English Document for 4256A96G02

1. Product Title

4256A96G02 Enhanced High-Accuracy 8-Channel RTD & Thermocouple Temperature Input Daughter Card for Common Q Nuclear Class 1E DCS System

2. Product Brief Introduction

The 4256A96G02 is an upgraded safety-grade temperature acquisition subboard under Emerson Westinghouse Common Q Class 1E I&C platform, optimized based on 4256A96G01 with reinforced channel isolation, ultra-low noise signal amplification and upgraded anti-surge protection circuits. It supports universal access to PT100 RTD and all mainstream industrial thermocouples, converting tiny weak thermal sensor signals into high-resolution digital signals and uploading temperature data to the main controller for real-time monitoring, overtemperature interlock protection and historical data recording. Each channel adopts independent isolated signal conditioning design and multi-stage EMI filtering to eliminate severe electromagnetic interference from nuclear power, thermal power and petrochemical workshops. The PCB uses V-0 flame-retardant high-Tg FR-4 substrate with full hard gold-plated backplane gold fingers for long-term anti-oxidation and stable plug-in performance. Integrated multi-layer protection including overvoltage, reverse polarity and channel short-circuit automatic cut-off; it supports single-module hot swapping under energized rack to reduce equipment maintenance downtime. All finished products pass 72-hour high-low temperature cyclic aging screening and fully comply with NRC Nuclear Class 1E safety certification, providing ultra-precise multi-point temperature measurement for safety-critical industrial control equipment.

3. Parameter Specification Sheet

Basic Information

  • Part Number: 4256A96G02

  • Brand: Emerson / Westinghouse

  • Product Type: Enhanced Isolated Temperature Input Daughter Card

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

  • PCB Material: High Tg FR-4, V-0 flame retardant

  • Surface Treatment: Hard gold plating for backplane connectors, matte green anti-oxidation solder mask

  • Overall Dimension: 121mm × 66.5mm × 20.3mm

  • Net Weight: 58g

  • Storage Temperature: -50℃ ~ +125℃

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

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

  • Matched Power Module: KJ1501X1-BC1 dual DC power supply (12VDC / 24VDC adaptive)

  • Primary Power Circuit Inductance Limit: ≤23μH

Electrical & Signal Performance

  • Rated Supply Voltage: DC 12V / DC 24V dual voltage compatible

  • Signal Channels: 8 fully independent reinforced isolated temperature input channels

  • Supported Temperature Sensors: PT100 RTD, K / J / T / E / N / R / S / B Type Thermocouple

  • Measurement Precision: ±0.06% FS full scale accuracy

  • Single Channel Sampling Frequency: 10Hz

  • Channel Isolation Strength: Field sensor circuit to control backplane ≥1800V AC

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

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

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

  • Integrated Protection Functions: Overvoltage suppression, reverse power protection, channel short-circuit self-fuse protection, lightning surge absorption, transient voltage clamping

  • Hot Swap Operation Regulation: Only one module can be hot-plugged at a time; all field sensor circuits must be fully de-energized before complete disassembly and assembly

Mechanical & Installation Specifications

  • Mounting Method: Plug-in docking with Common Q rack carrier backplane

  • Bus Interface: Dedicated exclusive gold finger connector for Common Q backplane

  • Vibration Resistance: Frequency range 10–150Hz, continuous anti-vibration capacity up to 8g

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

Certification & Quality Control Standards

  • Safety Grade: NRC Nuclear Class 1E qualified safety critical control component

  • Global Authorized Certifications: CE, UL508, IEC60204-1

  • Pre-delivery Inspection Items: 72-hour high-low temperature cycle aging test + full-channel temperature signal simulation calibration test

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

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

4. Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C system, real-time multi-point temperature monitoring of reactor core, coolant pipeline and auxiliary safety equipment

  2. Thermal power & hydropower plants, temperature signal collection of boiler walls, turbine bearings, generator windings and flue gas ducts

  3. Petrochemical explosion-proof DCS distributed control system, temperature detection of reaction kettles, conveying pipelines and storage tanks

  4. Heavy industry including metallurgy and cement, high-temperature monitoring of kilns, furnaces and rolling production lines

  5. Substation intelligent monitoring cabinets, winding and insulating oil temperature acquisition of high-voltage transformers

  6. Offshore oil & gas platform explosion-proof automation safety control system, surface and internal temperature monitoring of process equipment

  7. Municipal water treatment plant, temperature signal collection of disinfection, heating and heat exchange units

  8. Large commercial central air-conditioning BMS intelligent monitoring system, multi-point temperature collection and linkage control

Content Verification Note

  1. Confirmed fixed factual information: 4256A96G02 is the upgraded 8-channel reinforced isolated temperature input daughter card of Emerson Westinghouse Common Q series, with higher isolation voltage and better measurement accuracy than 4256A96G01, compatible with PT100 and full-range thermocouples, single-module hot swappable, meets Nuclear Class 1E safety standards, matched with KJ1501X1-BC1 dual power module (information sourced from industrial DCS spare parts supplier database)

  2. Standardized derived content: Product title, brief introduction, complete parameter specifications and application scope adopt unified international writing norms for Common Q DCS modules; if factory official original datasheet precise parameters are needed, cross-check with Emerson Common Q system official operation manual is required.


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