Parameter Specifications

1. Part Number: 4D33914G05

2. Manufacturer: Emerson Westinghouse

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

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

5. PCB Material: Multi-layer extra-heavy copper halogen-free V-0 flame-retardant ultra-high-Tg FR-4 substrate, full anti-mold & salt-fog conformal coating

6. Dimension & Weight: 145mm × 66mm × 20.6mm; Net Weight: 65g

7. Ambient Operating Envelope

   Operating Temperature: -30℃ ~ +78℃

   Storage Temperature: -55℃ ~ +132℃

   Humidity: 5%~99% RH, non-condensing, salt-fog resistant coating

8. Power Supply: DC 12V / DC 24V ultra-wide adaptive input, four-stage full protection (reverse connection / overvoltage / undervoltage / input surge)

9. Input Channels: 16 fully independent galvanic isolated discrete input channels

10. Supported Signal Type: Passive dry contact DI (no external field power supply)

    Contact judgment threshold: ON contact resistance ≤500Ω; OFF contact resistance ≥100kΩ

11. Isolation Index

    Single channel 2500V AC isolation withstand; 2500V AC dielectric strength withstand test for 60s; Insulation resistance ≥2000MΩ @500VDC

12. EMC Anti-interference Performance

    Power frequency interference attenuation ≥60dB, fully compliant with IEC 61000-6-2, full IEC 61000-4 EMC series + nuclear plant containment supplementary electromagnetic compatibility specifications

13. Protection & Intelligent Diagnosis Functions

    • Dual threshold ultra-high-precision constant current limiting protection per channel

    • Three-stage cascaded bidirectional ultra-large-energy surge absorption circuit

    • Full misconnection anti-damage protection: reverse polarity, cross wiring, overvoltage, undervoltage, overload, short-circuit

    • Sub-microsecond multi-dimensional real-time fault detection: contact open-circuit, short-circuit, contact bounce, contact resistance drift, terminal loose contact, interference false trigger, circuit aging early warning

    • Nanosecond ultra-high-precision timestamp fault upload, built-in fault level classification, channel location marking and event log sorting

    • Ultra-high-resolution full capture of fault transient waveform + permanent non-volatile historical fault storage, 10-year offline data retention without power supply

14. Mechanical & Seismic Reliability

    Continuous vibration resistance 15g (10–150Hz); Shock resistance 35g pulse, 11ms duration; single anti-loose terminal locking structure; full IEEE 344 nuclear seismic qualification

15. Core Feature: Single module hot swappable under energized rack without interrupting any Class 1E safety interlock signal acquisition loops

16. Certifications: CE, UL508, IEC60204-1, full NRC Class 1E nuclear safety qualification, IEEE 344 seismic qualification

17. Aging & Validation Standard: 120-hour full-load high-low temperature cyclic aging test + multi-cycle thermal fatigue durability verification + full electromagnetic stress screening + seismic vibration impact simulation test

18. Design Service Life: ≥180,000 hours of 24/7 unattended continuous operation

19. Warranty Period: 18-month global unified warranty for original factory modules and certified factory refurbished modules

Application Fields

1. Nuclear Power Plant Common Q Safety I&C Racks

   Premium seismic ultra-high-isolation high-density multi-point digital acquisition terminal for reactor core auxiliary safety cabinets and containment local safety racks, collecting ultra-stable dry contact feedback signals of primary cooling valve groups, containment multi-group safety barrier interlocks and reactor trip protection switches under seismic accident conditions.

2. AP1000 Nuclear Post-Accident Monitoring System (PAMS)

   Seismic anti-interference multi-channel isolated discrete input board for containment passive cooling valve position limit switches, containment atmosphere isolation barrier interlock contacts and post-accident equipment state feedback dry contacts.

3. Seismic-Grade Thermal & Hydropower Station Main Control Systems

   Gen5 seismic-resistant DI input module for boiler safety interlock measuring points: furnace safety door contacts, turbine overspeed trip switches and feedwater valve position feedback switches for seismic-resistant power plants.

4. High-Risk Seismic Explosion-Proof Petrochemical DCS Distributed Control System

   Nuclear seismic-grade digital wiring terminal card for reactor emergency shutdown interlock contacts, safety cabin limit switches and storage tank liquid level trip dry contacts in seismic hazardous chemical zones.

5. Offshore Marine Anti-Seismic Anti-Salt-Fog Oil & Gas Automation Racks

   Anti-seismic anti-salt-fog ultra-high-isolation digital acquisition interface for wellhead ESD valve feedback switches, platform safety hatch interlocks and separator high-pressure trip contacts.

6. Large Heavy-Duty Seismic Backup Diesel Generator Safety Cabinets

   Multi-point discrete input subcard for genset overspeed trip switches, lubricating oil low-pressure interlock contacts and exhaust over-temperature protection limit switches of nuclear island emergency backup power units.

7. Large-Scale Municipal Seismic Safety Water Treatment Interlock DCS Systems

   Seismic high-performance isolation digital signal terminal for pipeline emergency gate feedback switches, chemical tank overflow interlock contacts and large blower motor fault trip limit switches.

8. High-Temperature Seismic Metallurgy & Large Cement Kiln Production Lines

   Heavy-duty wide-temperature seismic-resistant digital acquisition module for rotary kiln safety door interlock contacts, dust removal equipment fault switches and high-temperature pipeline over-pressure trip dry contacts.

Core Upgrade Comparison: G05 vs G04

1. Isolation voltage upgraded from 2200V AC to 2500V AC, insulation resistance raised to 2000MΩ, greatly suppress inter-channel crosstalk in near-core high-EMI containment areas

2. EMI filter attenuation increased from 55dB to 60dB, sixth-order composite filter optimized for nuclear plant strong electromagnetic radiation environment

3. Added full IEEE 344 nuclear seismic qualification; vibration resistance upgraded from 10g to 15g, shock resistance up to 35g pulse; equipped single anti-loose locking terminal structure to avoid signal disconnection during seismic events

4. Full-board dual-function conformal coating (anti-mold + anti-salt-fog), adapt to long-term high-humidity containment and offshore marine working conditions

5. PCB mechanical reinforcement layout optimized to enhance structural rigidity and resist seismic deformation

6. Design service life extended from 150,000h to 180,000h, factory warranty prolonged from 12 months to 18 months

7. All mechanical dimensions, backplane pin definitions, signal logic fully compatible with G01/G02/G03/G04 for direct drop-in replacement without rack modification