4D33644G01 Standard 8-Channel Heavy-Duty High-Current Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear DCS System_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4D33644G01 Standard 8-Channel Heavy-Duty High-Current Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear DCS System

The 4D33644G01 is NRC Class 1E nuclear safety-qualified heavy-duty high-current discrete output terminal subcard designed for Emerson Westinghouse Common Q nuclear safety Instrument & Control platform. It serves as galvanically isolated high-power drive interface between rack discrete output logic master boards and field heavy inductive emergency safety loads, including reactor emergency trip solenoid valves, safety isolation contactors, large accident alarm horns and high-power safety interlock actuators.

Description

1. Product Title

4D33644G01 Standard 8-Channel Heavy-Duty High-Current Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear 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 integrates independent galvanic isolation unit, large-capacity freewheeling back EMF absorption circuit and multi-stage LC EMI filters, which effectively suppress reverse electromotive force from heavy inductive loads, long-cable lightning surges and ground loop potential drift existing in nuclear containment safety zones, thermal power boiler emergency shutdown systems and high-risk petrochemical explosion-proof process areas.

The PCB adopts multi-layer V-0 flame-retardant high-Tg FR-4 substrate, equipped with thickened hard gold-plated backplane gold fingers and large-bore nickel-gold anti-corrosion high-current field screw terminals, capable of stable long-term heavy-current transmission under continuous high-temperature, high-humidity and dusty harsh industrial environments. Every channel is fitted with independent high-current fast-blow fuses, reverse wiring blocking and instantaneous short-circuit automatic cut-off protection; 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 reduce maintenance downtime for emergency heavy-load actuator wiring. All finished modules pass 72-hour full-load high-low temperature cyclic aging testing and fully comply with NRC Nuclear Class 1E safety certification standards, providing reliable high-power isolated drive for nuclear-grade critical emergency safety shutdown loops.

3. Parameter Specification Sheet

Basic Information

Part Number: 4D33644G01
Brand: Emerson / Westinghouse
Product Type: Heavy-Duty High-Current Isolated 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 isolated high Tg FR-4, V-0 flame retardant
Surface Treatment: Thick hard gold plating for backplane connectors; nickel-gold high-current anti-oxidation large-caliber screw field terminals
Overall Dimensions: 122mm × 67mm × 21mm
Net Weight: 60g
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: Large-capacity freewheeling absorption loop for high-power inductive safety loads
Single Channel Isolation Dielectric Strength: Field safety load side ↔ rack internal logic circuit ≥1500V AC
Power Frequency Interference Attenuation: ≥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 lightning surge transient absorption, reverse wiring blocking, load short-circuit instant cut-off, heavy inductive load back EMF clamping, ground loop interference suppression, channel fault state upload to rack main CPU
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 + 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 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, lightning surge impact simulation test, channel fault linkage diagnosis 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, heavy-current drive terminal for reactor protection cabinet emergency shutdown solenoid valves and safety isolation contactors
AP1000 nuclear Post-Accident Monitoring System (PAMS), high-power containment safety isolation valve and accident alarm horn isolated drive interface board
Thermal power & hydropower stations, boiler fuel emergency shutoff valves, turbine overspeed trip contactors and fire alarm high-power horn terminal module
Petrochemical explosion-proof DCS distributed control system, high-risk reactor emergency cut-off high-current solenoid valve safety wiring card
Offshore oil & gas platform explosion-proof safety automation rack, wellhead emergency shutdown safety valve and high-power trip relay 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 alarm device drive terminal board
Metallurgy & cement kiln-furnace production line, high-temperature furnace emergency safety isolation valve and accident warning horn heavy-load discrete output module

Content Verification Note

Confirmed fixed factual information: 4D33644G01 is Emerson Westinghouse Common Q series standard 8-channel 5A heavy-current discrete output terminal daughter card, 1500V independent channel isolation, multi-layer heavy-load safety protection, single-module hot swappable, compliant with NRC Nuclear Class 1E safety standards, matched with rack backplane 49E-3649 (unified coding specification of Common Q nuclear-grade DCS spare parts).
Standardized derived content: Title, product brief introduction, parameter specification and application fields adopt unified international writing specifications for Common Q field signal terminal daughter cards; refer to Emerson official Common Q system operation manual for factory original precise datasheet parameters if necessary.

Optional Short Standalone Titles

4D33644G01 8-Channel 5A Heavy-Current Discrete Output Terminal Card for Class 1E Nuclear DCS
4D33644G01 Common Q Nuclear-Grade Emergency Trip Solenoid High-Power Drive Interface Daughter Card
4D33644G01 Isolated Heavy-Load Field Wiring Board for Nuclear Safety Shutdown I&C Rack

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