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4D33711G03 Gen3 High-Isolation High-Reliability 16-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS

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4D33711G03 Gen3 High-Isolation High-Reliability 16-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS
June 10, 2026

4D33711G03 Gen3 High-Isolation High-Reliability 16-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS

Certified to NRC Class 1E nuclear safety standards, the 4D33711G03 is the third-generation upgraded discrete output terminal daughter card iteratively optimized from G01 and G02 for Emerson Westinghouse Common Q safety I&C platform. It converts digital logic control signals from master controllers into isolated transistor switching signals to drive field solenoid valves, safety alarm horns, control contactors and low-power auxiliary actuators. Each channel features 2000V reinforced galvanic isolation and 50dB high-order multi-stage EMI filter arrays to fully suppress power frequency noise, wide-range ground loop drift and high-energy lightning surge transient interference. Built with thick copper zero-halogen flame-retardant PCB and triple-thick hard gold-plated backplane connectors paired with corrosion-resistant nickel alloy terminals, this card integrates full-channel high-speed intelligent fault diagnosis, fault waveform capture, multi-layer all-around circuit protection and hot-swap maintenance without interrupting other safety switching loops, delivering ultra-stable long-term drive performance under extreme harsh environments of wide temperature fluctuation, high humidity, heavy dust and continuous strong vibration.

Description

Parameter Specifications

  1. Part Number: 4D33711G03

  2. Manufacturer: Emerson Westinghouse

  3. Compatible System: Common Q Class 1E Safety Instrument & Control DCS System

  4. Matching Accessories: Discrete output master logic boards, 49E-3649 rack backplane, 475HP1ENA9GMT redundant rack power supply

  5. PCB Material: Multi-layer thick copper zero-halogen V-0 flame-retardant high-Tg FR-4

  6. Dimension & Weight: 118mm × 64.5mm × 19.7mm; Net Weight: 55g

  7. Ambient Operating Conditions: Operating Temp -30℃ ~ +75℃, Storage Temp -50℃ ~ +130℃, Humidity 5%~98% RH non-condensing

  8. Power Supply: DC 12V / DC 24V dual wide-range adaptive input

  9. Output Channels: 16 fully independent galvanic isolated discrete output channels

  10. Drive Type: Isolated transistor switching output for low-power field safety loads

  11. Per-channel Continuous Rated Current: 0.7A

  12. Isolation Index: Single channel isolation withstand voltage 2000V AC; Dielectric withstand 2000V AC for 60s; Insulation resistance ≥1500MΩ @500VDC

  13. EMC Anti-interference: Power frequency interference attenuation ≥50dB, complies with IEC 61000-6-2 industrial EMC specification

  14. Protection & Intelligent Diagnosis: Per-channel precision constant current limiting protection, bidirectional ultra-high-energy surge absorption, reverse polarity lockout, microsecond-level open/short-circuit instant detection, real-time fault identification, microsecond high-precision timestamp fault upload, fault transient waveform full capture

  15. Mechanical Reliability: Continuous vibration resistance 10g (10–150Hz); Shock resistance 30g pulse, 11ms duration

  16. Core Feature: Single module hot swappable under energized rack

  17. Certifications: CE, UL508, IEC60204-1, NRC Class 1E nuclear safety qualification

  18. Aging Test Standard: 96-hour full-load high-low temperature cyclic aging test with thermal cycle fatigue verification

  19. Design Service Life: ≥150,000 hours of 24/7 uninterrupted continuous operation

  20. Warranty Period: 12-month global unified warranty for original and factory refurbished modules

Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C racks: High-isolation safety switching drive terminal for auxiliary cabinet solenoid valves, local accident alarm horns and safety auxiliary contactors

  2. AP1000 nuclear Post-Accident Monitoring System (PAMS): Reinforced anti-interference isolated switching output board for containment auxiliary vent valves and core accident annunciator devices

  3. Thermal & hydropower station main control systems: High-reliability discrete output module for boiler drain solenoid valves, flue gas exhaust dampers and unit safety alarm buzzers

  4. High-risk explosion-proof petrochemical DCS distributed control system: Premium safety drive wiring card for reactor emergency cut-off solenoid valves, storage tank over-limit alarm horns and process pump control contactors

  5. Offshore oil & gas explosion-proof automation racks: Anti-vibration safety signal isolation drive interface for wellhead emergency shutdown solenoids, platform warning light arrays and heating equipment contactors

  6. Large diesel generator safety sequential control cabinets: Discrete output subcard for unit emergency stop solenoids, critical fault alarm horns and cooling water pump control contactors

  7. Municipal large-scale water treatment safety interlock DCS systems: High-performance isolation switching drive terminal for pipeline inlet shut-off solenoids, chemical dosing equipment contactors and tank overflow alarm devices

  8. Metallurgy & cement kiln production lines: Heavy-duty safety discrete drive module for kiln isolation solenoids, dust removal fan control contactors and high-temperature over-limit alarm horns


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