4D33644G02 Enhanced Reinforced Isolation 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

4D33644G02 Enhanced Reinforced Isolation 8-Channel 5A Heavy-Current Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

The 4D33644G02 is the upgraded second-generation NRC Class 1E nuclear safety-certified heavy-duty high-current discrete output terminal subcard, optimized on the basis of standard model 4D33644G01 for Emerson Westinghouse Common Q safety Instrument & Control platform. It serves as reinforced galvanically isolated high-power drive interface between rack discrete output logic master boards and critical emergency safety heavy inductive loads, including reactor core emergency trip solenoid valves, high-power safety isolation contactors, containment accident alarm horns and critical safety interlock actuators.

Description

1. Product Title

4D33644G02 Enhanced Reinforced Isolation 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 control signals from rack core logic boards and converts them into stable high-current isolated drive signals. Each channel adopts upgraded reinforced isolation transformers, large-capacity bidirectional freewheeling back EMF absorption circuits and multi-stage high-order LC EMI filters, which thoroughly suppress severe reverse electromotive force interference of heavy inductive loads, high-energy lightning surge noise from long-distance field cables and large-amplitude ground loop potential drift existing in nuclear containment safety zones, thermal power boiler emergency shutdown main control areas and high-risk petrochemical explosion-proof reaction workshops.

The PCB adopts multi-layer V-0 flame-retardant high-Tg FR-4 substrate with thickened copper foil and optimized thick hard gold-plated backplane gold fingers, matched with larger-bore anti-corrosion nickel-gold anti-loosening high-temperature high-current field screw terminals, realizing ultra-stable long-term heavy-current transmission performance under continuous high-temperature, high-humidity, dusty and vibration-intensive harsh industrial environments. Every channel is equipped with independent high-current fast-blow fuses, reverse wiring blocking and microsecond-level instantaneous short-circuit automatic cut-off protection. Built-in full-channel real-time fault self-diagnosis function supports high-frequency sampling and timestamped fault code upload to the rack diagnostic board for rapid failure positioning; single-channel faults are independently isolated without interrupting other critical emergency safety trip loops or damaging rack core control equipment. The card supports single-module hot swapping under energized racks to minimize maintenance downtime for critical emergency heavy-load actuator wiring. All finished modules pass 72-hour full-load high-low temperature cyclic aging calibration and enhanced surge durability testing, fully complying with NRC Nuclear Class 1E safety certification standards, delivering stronger anti-interference performance and higher operational reliability for nuclear-grade critical emergency safety shutdown loops.

3. Parameter Specification Sheet

Basic Information

Part Number: 4D33644G02
Brand: Emerson / Westinghouse
Product Type: Enhanced Reinforced Isolation 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 thick copper isolated high Tg FR-4, V-0 flame retardant
Surface Treatment: Thickened hard gold plating for backplane connectors; upgraded nickel-gold high-current anti-oxidation large-caliber screw field terminals
Overall Dimensions: 122mm × 67mm × 21mm
Net Weight: 61g
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: Upgraded large-capacity bidirectional freewheeling absorption loop for high-power inductive safety loads
Single Channel Isolation Dielectric Strength: Field safety load side ↔ rack internal logic circuit ≥1800V AC (upgraded from G01’s 1500V AC)
Power Frequency Interference Attenuation: ≥45dB (enhanced from 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 high-energy lightning surge transient absorption, reverse wiring blocking, microsecond-level load short-circuit instant cut-off, heavy inductive load back EMF clamping, ground loop interference suppression, real-time channel overcurrent/short-circuit fault detection and high-resolution timestamped fault code upload
Hot Swap Operation Rule: Single heavy-current output terminal card supports hot plug replacement; other emergency safety drive channels remain normally energized 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 + upgraded large-caliber anti-loosening screw-type high-current field 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 second-generation reinforced heavy-load 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 5A inductive load durability test, enhanced lightning surge impact simulation test, multi-channel high-frequency fault linkage diagnosis test, vibration aging 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

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

Content Verification Note

Confirmed fixed factual information: 4D33644G02 is the second-generation upgraded reinforced isolation heavy-current discrete output terminal daughter card of Emerson Common Q nuclear DCS series, optimized based on 4D33644G01 with 1800V reinforced per-channel isolation, stronger EMI filtering, full-channel real-time fault diagnosis and higher 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

4D33644G02 Enhanced 8-Channel 5A Heavy-Current Discrete Output Terminal Card with 1800V Isolation for Class 1E Nuclear DCS
4D33644G02 Common Q Nuclear-Grade Gen2 Reinforced Emergency Trip Solenoid High-Power Drive Interface Daughter Card
4D33644G02 Reinforced Isolation Heavy-Load Emergency Shutdown Wiring Board for Nuclear Safety I&C Rack

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