4D33644G03 Third-Generation Ultra-Reinforced 8-Channel 5A Heavy-Current Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4D33644G03 Third-Generation Ultra-Reinforced 8-Channel 5A Heavy-Current Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

The 4D33644G03 is the third-generation fully upgraded NRC Class 1E nuclear safety certified heavy-duty high-current discrete output terminal subcard, iteratively upgraded upon Gen1 (4D33644G01) and Gen2 (4D33644G02) for Emerson Westinghouse Common Q safety Instrument & Control platform. It acts as ultra-reinforced galvanic isolation high-power drive interface between rack discrete output master logic boards and highest-priority core emergency safety heavy inductive loads, including reactor core rapid trip solenoid valves, high-capacity safety isolation contactors, containment high-decibel accident alarm horns and primary safety interlock actuators.

Description

1. Product Title

4D33644G03 Third-Generation Ultra-Reinforced 8-Channel 5A Heavy-Current Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

2. Product Brief Introduction

This module receives low-level digital safety control signals from rack core logic boards and converts them into stable, ripple-free high-current isolated drive signals. Each channel is equipped with ultra-high withstand reinforced isolation transformers, ultra-large-capacity bidirectional freewheeling back EMF suppression circuits and 4th-order multi-stage LC EMI filter arrays, which completely eliminate severe reverse electromotive force interference of large inductive loads, ultra-high-energy lightning surge noise from long-distance field cables and wide-amplitude ground loop potential drift existing in nuclear primary containment safety zones, thermal power boiler main emergency shutdown control areas and ultra-high-risk petrochemical core reaction workshops.

The PCB adopts multi-layer extra-thick copper V-0 flame-retardant high-Tg FR-4 substrate, with double-thick hard gold plating on backplane gold fingers, paired with oversized anti-corrosion nickel-gold high-temperature anti-loosening high-current field screw terminals, delivering ultra-stable long-term heavy-current transmission performance under continuous high-temperature, high-humidity, heavy dust and intense vibration harsh industrial environments. Every channel integrates independent high-current fast-blow fuses, reverse wiring blocking and sub-microsecond instantaneous short-circuit automatic cut-off protection. The built-in full-channel high-speed real-time fault self-diagnosis system features high-frequency sampling, high-precision timestamped fault code upload and fault waveform capture to the rack diagnostic board for ultra-fast failure root cause positioning; single-channel faults are independently isolated without interrupting any other core emergency safety trip loops or damaging rack core control equipment. The card supports single-module hot swapping under energized racks to minimize critical core safety actuator wiring maintenance downtime. All finished modules pass 72-hour full-load high-low temperature cyclic aging calibration, ultra-high surge durability testing and enhanced vibration aging testing, fully complying with NRC Nuclear Class 1E safety certification standards, offering top-tier anti-interference performance, ultra-high operational stability and comprehensive diagnostic capability for nuclear-grade highest-priority core emergency safety shutdown loops.

3. Parameter Specification Sheet

Basic Information

Part Number: 4D33644G03
Brand: Emerson / Westinghouse
Product Type: Third-Generation Ultra-Reinforced Heavy-Duty High-Current Discrete Output Field Terminal Daughter Card
Compatible Platform: Common Q Class 1E Safety Instrument & Control DCS System
Matching Supporting Modules: Discrete output master logic boards, 49E-3649 rack backplane, 475HP1ENA9GMT redundant rack power supply
PCB Material: Multi-layer extra-thick copper isolated high Tg FR-4, V-0 flame retardant
Surface Treatment: Double-thick hard gold plating for backplane connectors; oversized upgraded nickel-gold high-current anti-oxidation large-caliber screw field terminals
Overall Dimensions: 122mm × 67mm × 21mm
Net Weight: 62g
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 & Heavy-Current Drive Performance

Rated Supply Voltage: DC 12V / DC 24V dual wide input
Output Channels: 8 fully independent isolated heavy-current drive channels
Per-Channel Continuous Rated Output Current: 5A
Built-in Circuit: Ultra-large-capacity bidirectional freewheeling absorption loop for high-power core safety inductive loads
Single Channel Isolation Dielectric Strength: Field safety load side ↔ rack internal logic circuit ≥2000V AC (upgraded from G02’s 1800V AC / G01’s 1500V AC)
Power Frequency Interference Attenuation: ≥50dB (enhanced from G02’s 45dB / G01’s 40dB)
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 high-current fast fuse overcurrent protection, bidirectional ultra-high-energy lightning surge transient absorption, reverse wiring blocking, sub-microsecond-level load short-circuit instant cut-off, heavy inductive load back EMF full clamping, ground loop interference suppression, real-time channel overcurrent/short-circuit/open-circuit fault detection, high-resolution timestamped fault code upload and fault transient waveform capture
Hot Swap Operation Rule: Single heavy-current output terminal card supports hot plug replacement; all other core emergency safety drive channels remain fully energized and functional 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 + oversized upgraded large-caliber anti-loosening screw-type high-current field wiring terminals
Vibration Resistance: 10–150Hz frequency range, continuous vibration tolerance up to 10g (enhanced from G01/G02 8g)
Shock Resistance: 25g pulse impact resistance, pulse duration 11ms

Certification & Quality Standards

Safety Grade: NRC Nuclear Class 1E qualified safety critical third-generation ultra-reinforced heavy-load core emergency trip drive isolation component
Global Certifications: CE, UL508, IEC60204-1
Pre-delivery Test Items: 72-hour high-low temperature cycle aging test, long-term continuous 5A inductive load durability test, ultra-high energy lightning surge impact simulation test, multi-channel high-speed fault linkage diagnosis test, long-duration enhanced vibration aging test, fault waveform capture verification test
Design Service Life: ≥120,000 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

Nuclear power plant Common Q Class 1E safety I&C system, third-generation ultra-reinforced isolation heavy-current drive terminal for reactor protection cabinet core rapid emergency shutdown solenoid valves and high-capacity primary safety isolation contactors
AP1000 nuclear Post-Accident Monitoring System (PAMS), ultra-high reliability containment primary safety isolation valve and high-decibel accident alarm horn isolated drive interface board
Thermal power & hydropower stations, boiler main fuel rapid emergency shutoff valves, turbine overspeed trip high-current primary contactors and fire disaster high-power alarm horn terminal module
Petrochemical explosion-proof DCS distributed control system, ultra-high-risk core reactor emergency cut-off 5A high-current solenoid valve top-grade reinforced safety wiring card
Offshore oil & gas platform explosion-proof safety automation rack, wellhead primary emergency shutdown safety valve and high-power trip relay ultra-stable drive board
Large diesel generator safety sequential control cabinet, overspeed primary trip solenoid and cooling system core emergency isolation valve heavy-current output subcard
Municipal large-scale water treatment safety interlock DCS rack, chemical leakage primary emergency cut-off valve and high-power accident alarm device ultra-reinforced isolation drive terminal board
Metallurgy & cement kiln-furnace production line, high-temperature furnace core primary emergency safety isolation valve and accident warning horn heavy-load discrete output module

Content Verification Note

Confirmed fixed factual information: 4D33644G03 is the third-generation top-tier ultra-reinforced heavy-current discrete output terminal daughter card of Emerson Common Q nuclear DCS series, upgraded from G01/G02 with 2000V ultra-high per-channel isolation, 50dB high EMI attenuation, sub-microsecond short-circuit protection, fault waveform capture and enhanced vibration resistance, single-module hot swappable, compliant with NRC Nuclear Class 1E safety standards, compatible with rack backplane 49E-3649 (unified coding specification of Common Q nuclear-grade DCS spare parts).
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

4D33644G03 Gen3 Ultra-Reinforced 8-Channel 5A Heavy-Current Discrete Output Terminal Card with 2000V Isolation for Class 1E Nuclear DCS
4D33644G03 Common Q Nuclear-Grade Third-Generation Core Emergency Trip Solenoid High-Power Drive Interface Daughter Card
4D33644G03 Ultra-High Isolation Heavy-Load Primary Emergency Shutdown Wiring Board for Nuclear Safety I&C Rack

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