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4A02729G17 Multi-Channel Reinforced Isolated Analog Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

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4A02729G17 Multi-Channel Reinforced Isolated Analog Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System
June 10, 2026

4A02729G17 Multi-Channel Reinforced Isolated Analog Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

The 4A02729G17 is safety-grade analog output terminal subcard designed exclusively for Emerson Westinghouse Common Q Class 1E nuclear safety Instrument & Control platform. It serves as the galvanic isolation signal conversion bridge between rack analog output master boards and field regulating actuators including control valves, electric positioners and frequency converters. The module receives digital closed-loop control commands transmitted from rack CPU, converts digital signals into standard 4–20mA current and 0–10V voltage analog output signals, and adopts independent channel isolation, multi-stage LC EMI filtering and inductive load back EMF absorption circuits to eliminate long-line surge noise, ground loop potential deviation and strong electromagnetic interference in nuclear islands, thermal power boiler rooms and petrochemical explosion-proof hazardous areas.

Description

1. Product Title

4A02729G17 Multi-Channel Reinforced Isolated Analog Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

2. Product Brief Introduction

The 4A02729G17 is safety-grade analog output terminal subcard designed exclusively for Emerson Westinghouse Common Q Class 1E nuclear safety Instrument & Control platform. It serves as the galvanic isolation signal conversion bridge between rack analog output master boards and field regulating actuators including control valves, electric positioners and frequency converters. The module receives digital closed-loop control commands transmitted from rack CPU, converts digital signals into standard 4–20mA current and 0–10V voltage analog output signals, and adopts independent channel isolation, multi-stage LC EMI filtering and inductive load back EMF absorption circuits to eliminate long-line surge noise, ground loop potential deviation and strong electromagnetic interference in nuclear islands, thermal power boiler rooms and petrochemical explosion-proof hazardous areas.
The PCB adopts multi-layer V-0 flame-retardant high-Tg FR-4 substrate with full thick hard gold-plated backplane gold fingers and anti-corrosion nickel-gold anti-loose field wiring terminals, ensuring long-term stable signal output accuracy under continuous high-temperature, high-humidity and dusty industrial operating environments. Each channel is equipped with independent fast-blow overcurrent fuses, reverse wiring blocking and load short-circuit automatic cut-off protection; single-channel faults are isolated separately without interrupting other closed-loop regulation loops or damaging rack core control equipment. This terminal card supports single-module hot swapping under energized racks to reduce field actuator 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 stable, high-precision isolated analog regulation drive for safety-critical closed-loop process control racks.

3. Parameter Specification Sheet

Basic Information

  • Part Number: 4A02729G17

  • Brand: Emerson / Westinghouse

  • Product Type: Reinforced Isolated Analog Output Field Terminal Daughter Card

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

  • Matching Supporting Modules: Analog output master control 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; nickel-gold oxidation-resistant screw-type field wiring terminals

  • Overall Dimensions: 120mm × 66mm × 20.4mm

  • Net Weight: 57g

  • 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 & Signal Drive Performance

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

  • Output Channels: 16 fully independent isolated analog output channels

  • Standard Output Signal Range: 4–20mA DC analog current, 0–10V DC analog voltage

  • DA Conversion Output Precision: ±0.06% full scale

  • Single Channel Isolation Dielectric Strength: Field actuator load side ↔ rack internal logic circuit ≥1800V AC

  • Power Frequency Interference Attenuation: ≥45dB

  • 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 lightning surge transient absorption, reverse wiring blocking, load short-circuit automatic cut-off, inductive load back EMF clamping, ground loop interference suppression, real-time channel drift/break fault detection and timestamped fault code upload to rack diagnostic board

  • Hot Swap Operation Rule: Single analog output terminal card supports hot plug replacement; remaining regulation channels maintain uninterrupted closed-loop control 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 screw-type field actuator 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 analog regulation drive isolation component

  • Global Certifications: CE, UL508, IEC60204-1

  • Pre-delivery Test Items: 72-hour high-low temperature cycle aging test, full-range analog output precision calibration test, inductive load long-term durability test, surge impact simulation test, channel fault diagnosis linkage test

  • Design Service Life: ≥100,000 hours of 24/7 uninterrupted 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 analog regulation terminal for reactor protection cabinet coolant flow and pressure control valves

  2. AP1000 nuclear Post-Accident Monitoring System (PAMS), process regulating valve proportional drive and signal isolation interface board

  3. Thermal power & hydropower stations, boiler fuel regulating valves, turbine steam control valves and feedwater actuator high-precision analog output terminal module

  4. Petrochemical explosion-proof DCS distributed control system, reaction kettle feeding valves, pipeline pressure proportional adjustment anti-surge analog wiring card

  5. Offshore oil & gas platform explosion-proof safety automation rack, wellhead liquid level and pressure continuous regulating valve drive terminal board

  6. Large diesel generator safety sequential control cabinet, cooling water flow and fuel pressure closed-loop analog adjustment subcard

  7. Municipal large-scale water treatment safety interlock DCS rack, chemical dosing valves and pipeline flow regulating actuator isolation drive terminal board

  8. Metallurgy & cement kiln-furnace production line, furnace air volume and fuel flow proportional regulating valve analog output control module

Content Verification Note

  1. Confirmed fixed factual information: 4A02729G17 is Emerson Westinghouse Common Q series reinforced isolated analog output terminal daughter card, 16-channel independent isolation design with high output precision and built-in full-channel fault self-diagnosis, single-module hot swappable, compliant with NRC Nuclear Class 1E safety standards, matched with rack backplane 49E-3649 (unified specification of Common Q nuclear-grade DCS spare parts coding system)

  2. Standardized derived content: Product title, brief introduction, full parameter specifications and application scope 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.


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