4D33865G03 Gen3 High-Isolation High-Density 16-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4D33865G03 Gen3 High-Isolation High-Density 16-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS

Fully NRC Class 1E nuclear safety certified, the 4D33865G03 is third-generation high-performance high-density discrete transistor output terminal daughter card, comprehensively upgraded on standard G01 and reinforced G02 versions for Emerson Westinghouse Common Q safety I&C platform. It converts digital logic commands from master logic boards into 2000V reinforced galvanic isolated multi-channel switching drive signals, specially used to drive large batches of nuclear safety critical loads: multi-group primary isolation solenoid valves, multi-stage containment accident annunciator arrays, safety-grade auxiliary contactor banks and low-power nuclear safety actuators.

Description

Parameter Specifications

Part Number: 4D33865G03
Manufacturer: Emerson Westinghouse
Compatible System: Common Q Class 1E Safety Instrument & Control DCS System
Matching Accessories: Discrete output master logic boards, 49E-3649 rack backplane, 475HP1ENA9GMT redundant rack power supply
PCB Material: Multi-layer thick copper zero-halogen V-0 flame-retardant high-Tg FR-4
Dimension & Weight: 145mm × 66mm × 20.6mm; Net Weight: 64g
Ambient Operating Envelope
Operating Temp: -30℃ ~ +75℃
Storage Temp: -50℃ ~ +130℃
Humidity: 5%~98% RH non-condensing
Power Supply: DC 12V / DC 24V dual wide-range adaptive input
Output Channels: 16 fully independent galvanic isolated discrete output channels
Drive Topology: Isolated transistor sinking/sourcing switching output for nuclear-grade low-power safety field loads
Per-Channel Continuous Rated Load Current: 0.7A
Isolation Index
Single channel 2000V AC isolation withstand; 2000V AC dielectric strength test for 60s; Insulation resistance ≥1500MΩ @500VDC
EMC Anti-interference Performance
Power frequency interference attenuation ≥50dB, fully compliant with IEC 61000-6-2 industrial EMC specification
Protection & Intelligent Diagnosis Functions
- Per-channel high-precision constant current limiting protection
- Bidirectional ultra-high-energy surge absorption circuit
- Reverse wiring polarity lockout protection
- Microsecond-level real-time detection: output loop open-circuit / short-circuit / load wiring poor contact fault
- High-precision timestamp fault code real-time upload to master controller
- Fault transient waveform full capture + permanent non-volatile historical fault storage
Mechanical Reliability
Continuous vibration resistance 10g (10–150Hz); Shock resistance 30g pulse, 11ms duration
Core Feature: Single module hot swappable under energized rack without interrupting safety control loops
Certifications: CE, UL508, IEC60204-1, NRC Class 1E nuclear safety qualification
Aging Validation Standard: 96-hour full-load high-low temperature cyclic aging test + thermal cycle fatigue durability verification
Design Service Life: ≥150,000 hours of 24/7 unattended continuous operation
Warranty Period: 12-month global unified warranty for original factory modules and certified factory refurbished modules

Application Fields

Nuclear Power Plant Common Q Safety I&C Racks
High-isolation high-density multi-point safety switching drive terminal for reactor auxiliary cabinets, driving batch primary cooling system isolation solenoid valves, containment multi-group accident warning light arrays and primary safety-grade auxiliary control contactor banks.
AP1000 Nuclear Post-Accident Monitoring System (PAMS)
Heavy-duty anti-interference high-density isolated switching output board for containment core isolation vent valve groups and reactor core full-set multi-stage accident annunciator alarm devices.
Thermal & Hydropower Station Main Control Systems
High-reliability high-density DO output module for boiler batch emergency cut-off drain solenoid valves, multi-group main flue gas safety isolation dampers and unit multi-path primary critical fault alarm buzzers.
High-Risk Explosion-Proof Petrochemical DCS Distributed Control System
Premium nuclear safety grade high-density drive wiring card for reactor cluster emergency shutdown solenoid valves, storage tank multi-group overpressure safety alarm horns and main process pump primary control contactor banks.
Offshore Oil & Gas Explosion-Proof Automation Racks
Anti-vibration ultra-stable high-density isolation drive interface for wellhead multi-way ESD emergency shutdown solenoid groups, platform multi-level warning light banks and heating system main control contactor arrays.
Large Diesel Generator Safety Sequential Control Cabinets
Multi-point discrete output subcard for unit emergency stop solenoid groups, multi-path core mechanical fault alarm horns and cooling water main pump control contactor banks.
Municipal Large-Scale Water Treatment Safety Interlock DCS Systems
High-performance high-density isolation switching drive terminal for pipeline inlet batch emergency shut-off solenoids, chemical dosing main equipment contactor groups and sedimentation tank multi-point overflow safety alarm devices.
Metallurgy & Cement Kiln Production Lines
Heavy-duty high-reliability safety discrete drive module for kiln batch high-temperature isolation solenoids, dust removal primary fan control contactor banks and kiln multi-channel over-temperature protection alarm horns.

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