Parameter Specifications

1. Part Number: 4D33914G03

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 thick copper halogen-free V-0 flame-retardant ultra-high-Tg FR-4 substrate

6. Dimension & Weight: 145mm × 66mm × 20.6mm; Net Weight: 64g

7. Ambient Operating Envelope

   Operating Temperature: -30℃ ~ +75℃

   Storage Temperature: -50℃ ~ +130℃

   Humidity: 5%~98% RH, non-condensing, anti-mold conformal coating

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

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

10. Supported Signal Type: Passive dry contact DI (field contacts without external power supply)

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

11. Isolation Index

    Single channel 2000V AC isolation withstand; 2000V AC dielectric strength withstand test for 60s; Insulation resistance ≥1500MΩ @500VDC

12. EMC Anti-interference Performance

    Power frequency interference attenuation ≥50dB, fully compliant with IEC 61000-6-2 and full series IEC 61000-4 industrial EMC standards, matched with nuclear plant containment supplementary EMC requirements

13. Protection & Intelligent Diagnosis Functions

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

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

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

    • Microsecond-level multi-dimensional real-time fault detection: contact open-circuit, short-circuit, contact bounce, abnormal contact resistance drift, terminal loose contact, signal interference false trigger

    • High-precision timestamp fault code + channel location + fault classification real-time upload to master controller

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

14. Mechanical Reliability

    Continuous vibration resistance 10g (10–150Hz); Shock resistance 30g pulse, 11ms duration

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

17. Aging & Validation Standard: 96-hour full-load high-low temperature cyclic aging test + thermal cycle fatigue durability verification + full electromagnetic stress screening

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

19. Warranty Period: 12-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

   High-isolation nuclear-grade high-density multi-point digital signal acquisition terminal for reactor core auxiliary safety cabinets, centralized collection of primary cooling system isolation valve feedback switches, containment multi-group safety barrier interlock contacts and reactor trip protection dry contact signals.

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

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

3. Thermal & Hydropower Station Main Control Systems

   High-reliability Gen3 DI input module for boiler primary auxiliary multi-point safety digital measuring points: furnace safety door interlock contacts, turbine overspeed trip limit switches and feedwater regulating valve position feedback switches.

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

   Premium nuclear safety grade digital wiring terminal card for reactor core hazardous zone emergency shutdown interlock contacts, safety cabin door limit switches and storage tank high/low liquid level trip dry contacts.

5. Offshore Oil & Gas Explosion-Proof Automation Racks

   Anti-vibration high-isolation digital acquisition interface for wellhead manifold ESD valve feedback switches, platform safety hatch interlock contacts and separator high-pressure over-limit trip switches.

6. Large Heavy-Duty Diesel Generator Safety Sequential Control Cabinets

   Multi-point discrete input subcard for genset overspeed trip switches, lubricating oil low-pressure interlock contacts and exhaust gas over-temperature protection limit switches.

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

   High-performance nuclear-grade isolation digital signal terminal for main pipeline emergency gate feedback switches, chemical dosing tank overflow interlock contacts and large blower motor fault trip limit switches.

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

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

Core Upgrade Comparison: G03 vs G02

1. Isolation voltage upgraded from 1800V AC to 2000V AC, insulation resistance increased to 1500MΩ, significantly suppress inter-channel signal crosstalk in high-EMI containment areas

2. EMI filter upgraded to fifth-order composite network, interference attenuation improved from 45dB to 50dB, stronger anti-radiation interference capability

3. Exclusive core function upgrade: added fault transient waveform capture and 10-year power-off non-volatile fault log storage (not available on G01/G02), convenient post-accident root cause analysis

4. Fault detection speed upgraded to microsecond level, newly added detection items of contact resistance drift and false trigger interference warning

5. Surge absorption circuit optimized to three-stage cascaded design, stronger resistance to field switching surges and lightning transient impact

6. Operating temperature range expanded (-30℃ ~ +75℃), full-board anti-mold conformal coating for long-term high-humidity nuclear island environments

7. Design service life extended from 100,000 hours to 150,000 hours; mechanical dimensions, backplane pin definitions and signal logic fully compatible with G01/G02 for direct drop-in replacement