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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.


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