Parameter Specifications

1. Part Number: 4D33915G02

2. Manufacturer: Emerson Westinghouse

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

4. Matching Accessories: Active 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 active discrete input channels

10. Signal Type: 24VDC active voltage DI

    Logic threshold: ON ≥18VDC; OFF ≤6VDC; reverse voltage withstand ±30VDC

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 polarity lockout, overvoltage and misconnection anti-damage protection

    • Real-time fast detection: loop open-circuit, short-circuit, abnormal input voltage drift, terminal loose contact, signal bounce false trigger

    • 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 active 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 active digital signal acquisition terminal for reactor auxiliary cabinets, centralized collection of electronic valve position transmitters, safety relay status and trip amplifier 24VDC feedback signals.

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

   High anti-interference isolated active DI board for containment electronic position feedback sensors, passive cooling system solid-state interlock outputs and accident electrical status signals.

3. Thermal & Hydropower Station Main Control Systems

   Upgraded high-density active DI module for boiler electronic safety interlock relays, turbine trip amplifier status and feedwater valve electronic feedback transmitters.

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

   Premium reinforced active digital wiring terminal card for reactor ESD solid-state output signals, safety cabinet fault relay voltage feedback in hazardous zones.

5. Offshore Oil & Gas Explosion-Proof Automation Racks

   Anti-vibration isolation active digital acquisition interface for wellhead ESD electronic valve feedback, platform safety control relay 24VDC status signals.

6. Large Diesel Generator Safety Sequential Control Cabinets

   Multi-point active discrete input subcard for overspeed trip amplifier output, low lube pressure relay status and exhaust over-temperature electronic feedback signals.

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

   Reinforced isolation active digital signal terminal for pipeline electronic gate feedback transmitters, chemical tank overflow relay voltage signals and blower fault amplifier outputs.

8. Metallurgy & Cement Kiln Production Lines

   High-reliability multi-point active digital acquisition module for kiln safety electronic interlock relays, dust removal equipment fault amplifier and pipeline over-pressure electronic trip signals.

Core Upgrade Difference: G02 vs Base G01

1. Channel isolation voltage upgraded from 1500V AC to 1800V AC, effectively suppress inter-channel voltage crosstalk in nuclear high EMI environment

2. Multi-stage high-order LC EMI filter adopted, power frequency interference attenuation improved from 40dB to 45dB, stronger anti-radiation interference performance

3. Optimized voltage threshold real-time monitoring logic, support input voltage drift early warning, faster loop open/short fault response speed

4. PCB copper thickness increased, terminal surface anti-corrosion passivation coating upgraded, adapt to long-term high humidity nuclear island environment

5. Dual-stage cascaded surge absorption circuit, stronger resistance to field power switching impact and lightning transient noise

6. Mechanical outline, backplane pin definition, signal threshold fully consistent with G01, support direct plug-and-play replacement without rack wiring modification

4D33915 Series Unified Iteration Rule (Consistent with full Common Q I/O product line)

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

• G02: Reinforced industrial enhanced version, 1800V isolation, 45dB attenuation, fast multi-dimensional active loop 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