Parameter Specifications

1. Part Number: 4D33914G02

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 zero-halogen V-0 flame-retardant high-Tg FR-4

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

7. Ambient Operating Envelope

   Operating Temp: -25℃ ~ +70℃

   Storage Temp: -50℃ ~ +125℃

   Humidity: 5%–95% RH, non-condensing

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

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

10. Signal Type: Passive dry contact DI (no external power required for field contacts)

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

11. Isolation Index

    Single channel 1800V AC isolation withstand; 2000V AC dielectric strength test for 60s; Insulation resistance ≥1200MΩ @500VDC

12. EMC Anti-interference Performance

    Power frequency interference attenuation ≥45dB, fully compliant with IEC 61000-6-2 industrial EMC specification

13. Protection & Intelligent Diagnosis Functions

    • Per-channel precise current limiting protection

    • Bidirectional high-energy surge absorption circuit

    • Reverse wiring polarity lockout & misconnection anti-damage protection

    • Real-time fast detection: contact open-circuit, short-circuit, contact bounce, abnormal contact resistance, terminal loose fault

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

14. Mechanical Reliability

    Continuous vibration resistance 8g (10–150Hz); Shock resistance 25g pulse, 11ms duration

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

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

17. Aging Validation Standard: 72-hour full-load high-low temperature cyclic aging test

18. Design Service Life: ≥100,000 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

   Reinforced high-density multi-point digital signal acquisition terminal for reactor auxiliary cabinets, centralized collection of isolation valve feedback switches, safety equipment interlock contacts and primary trip protection dry contact signals.

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

   High anti-interference isolated digital input board for containment multi-group accident status feedback contacts, passive cooling valve position limit switches and containment barrier interlock switches.

3. Thermal & Hydropower Station Main Control Systems

   Upgraded high-density DI input module for boiler safety door interlocks, turbine trip limit switches, feedwater valve position feedback and fire protection interlock contacts.

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

   Premium reinforced digital wiring terminal card for reactor emergency shutdown interlock contacts, safety barrier door switches and storage tank over-limit trip dry contacts in hazardous zones.

5. Offshore Oil & Gas Explosion-Proof Automation Racks

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

6. Large Diesel Generator Safety Sequential Control Cabinets

   Multi-point discrete input subcard for unit overspeed trip switches, cooling water low-pressure interlock contacts and exhaust over-temperature protection limit switches.

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

   Reinforced isolation digital signal terminal for pipeline emergency gate feedback switches, chemical tank overflow interlock contacts and blower fault trip limit switches.

8. Metallurgy & Cement Kiln Production Lines

   High-reliability multi-point digital acquisition module for kiln safety door interlock contacts, dust removal equipment fault switches and high-temperature pipeline over-limit trip dry contacts.

Core Upgrade Difference: G02 vs Base G01

1. Channel isolation voltage upgraded from 1500V AC to 1800V AC, greatly reduce inter-channel signal crosstalk

2. EMI filter stage optimized, power frequency interference attenuation improved from 40dB to 45dB, stronger anti-electromagnetic interference ability in nuclear island

3. Optimized contact resistance real-time monitoring logic, support contact bounce and poor contact early warning, improve fault detection speed

4. Reinforced PCB copper thickness and terminal anti-corrosion passivation coating, adapt to long-term high humidity nuclear plant environment

5. Surge absorption circuit upgraded to dual-stage design, stronger resistance to field switching impact and lightning transient noise

6. Fully consistent mechanical size, backplane pin definition and signal logic with G01, support direct plug-and-play replacement without rack modification

4D33914 Series Unified Iteration Rule (Consistent with full Common Q I/O product line)

• G01: Standard basic version, 1500V isolation, 40dB attenuation, basic contact status detection, simple fault alarm

• G02: Reinforced industrial enhanced version, 1800V isolation, 45dB attenuation, fast multi-dimensional contact fault diagnosis

• G03: Gen3 nuclear high-isolation grade, 2000V isolation, 50dB attenuation, fault waveform capture + non-volatile historical fault storage

• G04: Gen4 flagship ultra-high isolation, 2200V isolation, 55dB attenuation, nanosecond high-precision timestamp, expanded operating temperature range

• G05: Gen5 premium seismic qualified grade, 2500V isolation, 60dB attenuation, anti-loose locking terminals, IEEE 344 seismic certification, extended service life & warranty

• G06: Gen6 extreme super-isolation flagship, 3000V isolation, 65dB attenuation, nuclear anti-radiation screening, double anti-loose terminals, 15-year power-off fault data retention, full seismic + radiation dual certification