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4D33645G02 Enhanced 16-Channel Low-Current Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

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4D33645G02 Enhanced 16-Channel Low-Current Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System
June 10, 2026

4D33645G02 Enhanced 16-Channel Low-Current Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

Certified to NRC Class 1E nuclear safety standards, the 4D33645G02 is an upgraded low-current discrete output terminal board built for Emerson Westinghouse Common Q safety I&C platform. Featuring 1800V reinforced per-channel isolation and optimized multi-stage EMI filters, it drives low-power field loads including status indicator lamps and miniature signal relays while suppressing back EMF, lightning surges and ground loop drift. Equipped with thick gold-plated connectors and corrosion-resistant terminals, this card offers full-channel fault diagnosis, comprehensive multi-layer circuit protection and hot-swap capability to maintain stable operation under high-temperature, humid and dusty harsh industrial environments.

Description

Parameter Specifications

  1. Part Number: 4D33645G02

  2. Manufacturer: Emerson Westinghouse

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

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

  5. PCB: Multi-layer isolated V-0 flame-retardant high-Tg FR-4

  6. Dimension: 118mm × 64.5mm × 19.7mm; Net Weight: 54g

  7. Ambient Condition: Operating -25℃~+70℃, Storage -50℃~+125℃, 5%~95% RH non-condensing

  8. Power Supply: DC 12V / DC 24V dual adaptive

  9. Output Channel: 16 fully independent isolated channels

  10. Rated Continuous Output Current: 0.7A per channel

  11. Isolation Strength: 1800V AC per channel; Dielectric Withstand: 2000V AC for 60s; Insulation Resistance ≥1200MΩ @500VDC

  12. Interference Suppression: Power frequency attenuation ≥45dB, complies with IEC 61000-6-2 EMC standard

  13. Built-in Circuit: High-capacity freewheeling circuit for miniature inductive loads

  14. Protection & Diagnosis: Per-channel fast fuse, bidirectional surge absorption, reverse connection protection, short-circuit automatic cut-off, back EMF clamping, real-time fault signal upload

  15. Mechanical Resistance: Continuous vibration 8g (10–150Hz), 25g shock pulse for 11ms

  16. Feature: Single-module hot swappable

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

  18. Aging Test: 72-hour full-load high-low temperature cyclic aging

  19. Design Service Life: ≥100,000 hours of 24/7 continuous operation

  20. Warranty: 12-month global unified warranty

Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C racks: Drive terminal for auxiliary cabinet status lights and miniature interlock relays

  2. AP1000 nuclear Post-Accident Monitoring System (PAMS): Isolation drive board for auxiliary equipment annunciators and small auxiliary relays

  3. Thermal and hydropower station control systems: Output module for boiler flame indicators and turbine auxiliary interlock relays

  4. Explosion-proof petrochemical DCS: Wiring card for tank status indicators and safety alarm miniature relays

  5. Offshore oil & gas explosion-proof automation racks: Drive interface for wellhead status lamps and auxiliary interlock relays

  6. Large diesel generator safety sequential control cabinets: Discrete output subcard for fault indicators and control auxiliary relays

  7. Municipal large-scale water treatment safety interlock DCS: Drive terminal for liquid level lamps and chemical dosing auxiliary relays

  8. Metallurgy and cement kiln production lines: Drive module for furnace status indicators and high-temperature auxiliary interlock small relays


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