Parameter Specifications

1. Part Number: 4D33743G01

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 isolated V-0 flame-retardant high-Tg FR-4

6. Dimension & Weight: 120mm × 66mm × 20.6mm; Net weight: 58g

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

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

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

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

11. Isolation Performance: 1500V AC isolation voltage per channel; 2000V AC dielectric withstand for 60s; Insulation resistance ≥1200MΩ @ 500VDC

12. EMC Index: Power frequency interference attenuation ≥40dB, compliant with IEC 61000-6-2 industrial EMC standard

13. Protection & Diagnosis: Per-channel current-limiting protection, bidirectional surge absorption, reverse polarity protection, open-circuit/short-circuit fault detection, real-time fault status upload to main 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: Signal acquisition terminal for auxiliary cabinet valve position feedback and conventional safety interlock limit switches

2. AP1000 nuclear Post-Accident Monitoring System (PAMS): Isolation signal conversion board for containment auxiliary equipment passive dry contact feedback signals

3. Thermal & hydropower station control systems: Discrete input module for boiler auxiliary flame feedback, water level interlock and turbine auxiliary limit switches

4. Explosion-proof petrochemical DCS: Wiring card for pipeline safety interlock switches and reactor position feedback contacts

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

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

7. Municipal large-scale water treatment safety interlock DCS: Isolation terminal for liquid level limit and gate position interlock switches

8. Metallurgy and cement kiln production lines: Signal acquisition module for furnace door interlock and overpressure protection passive contacts