Parameter Specifications

1. Part Number: 4D33743G02

2. Manufacturer: Emerson Westinghouse

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

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

5. PCB Material: Multi-layer thick copper isolated V-0 zero-halogen flame-retardant high-Tg FR-4

6. Dimension & Weight: 120mm × 66mm × 20.6mm; Net weight: 59g

7. Ambient Conditions: Operating temperature -25℃ ~ +70℃; Storage temperature -50℃ ~ +125℃; Humidity 5%–95% RH, non-condensing

8. Power Input: DC 12V / DC 24V dual adaptive power supply

9. Input Channels: 12 fully independent galvanic isolated discrete input channels

10. Supported Signal Type: Passive dry contact, mechanical safety limit switch, valve position feedback contact, safety relay auxiliary interlock contact

11. Isolation Performance: 1800V AC isolation voltage per channel; 2000V AC dielectric withstand for 60s; Insulation resistance ≥1200MΩ @ 500VDC

12. EMC Index: Power frequency interference attenuation ≥45dB, compliant with IEC 61000-6-2 industrial EMC standard

13. Protection & Diagnosis: Per-channel precision current-limiting protection, bidirectional high-energy surge absorption, reverse polarity lockout, real-time open-circuit/short-circuit fault detection, high-precision timestamp fault code upload to master controller

14. Mechanical Performance: Continuous vibration resistance 8g (10–150Hz); Shock resistance 25g pulse, duration 11ms

15. Core Feature: Single-module hot swappable under energized rack

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

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

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

19. Warranty: 12-month global unified warranty

Application Fields

1. Nuclear power plant Common Q Class 1E safety I&C racks: Reinforced isolation signal acquisition terminal for auxiliary cabinet critical valve position feedback and core safety interlock limit switches

2. AP1000 nuclear Post-Accident Monitoring System (PAMS): High-stability isolation signal conversion board for containment key safety equipment passive dry contact feedback signals

3. Thermal & hydropower station control systems: Upgraded anti-interference discrete input module for boiler main flame feedback, main water level interlock and turbine critical safety limit switches

4. Explosion-proof petrochemical DCS distributed control system: Premium wiring card for reactor core safety interlock switches and critical storage tank valve position feedback contacts

5. Offshore oil & gas explosion-proof automation racks: Signal isolation interface for wellhead emergency shutdown valve feedback and primary process safety interlock contacts

6. Large diesel generator safety sequential control cabinets: Discrete input subcard for unit overspeed primary feedback and cooling system critical fault passive switches

7. Municipal large-scale water treatment safety interlock DCS: Reinforced isolation terminal for main liquid level limit and emergency isolation gate interlock switches

8. Metallurgy and cement kiln production lines: High-reliability signal acquisition module for furnace core safety door interlock and high-pressure overprotection passive contacts