4D33810G02 Upgraded Reinforced 12-Channel Isolated Discrete Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS
Description
NRC Class 1E nuclear safety fully certified, the 4D33810G02 is reinforced upgraded discrete dry contact input terminal daughter card optimized based on standard 4D33810G01 for Emerson Westinghouse Common Q safety I&C platform. It acquires passive dry contact feedback signals from critical safety limit switches, primary valve position transmitters, core equipment interlock contacts and reactor trip devices for nuclear safety interlock logic processing.
Parameter Specifications
Part Number: 4D33810G02
Manufacturer: Emerson Westinghouse
Compatible System: Common Q Class 1E Safety Instrument & Control DCS System
Matching Accessories: Discrete input master acquisition boards, 49E-3649 rack backplane, 475HP1ENA9GMT redundant rack power supply
PCB Material: Multi-layer thick copper zero-halogen V-0 flame-retardant high-Tg FR-4
Dimension & Weight: 120mm × 66mm × 20.6mm; Net Weight: 59g
Ambient Operating Envelope
Operating Temp: -25℃ ~ +70℃
Storage Temp: -50℃ ~ +125℃
Humidity: 5%–95% RH, non-condensing
Power Supply: DC 12V / DC 24V dual adaptive wide-range input
Input Channels: 12 fully independent galvanic isolated discrete input channels
Supported Signal: Passive dry contact (safety limit switches, valve position feedback, primary interlock relay contacts, trip protection switches)
Isolation Performance
Single channel 1800V AC isolation withstand; 2000V AC dielectric strength test for 60s; Insulation resistance ≥1200MΩ @500VDC
EMC Anti-interference Performance
Power frequency interference attenuation ≥45dB, fully compliant with IEC 61000-6-2 industrial EMC specification
Protection & Intelligent Diagnosis Functions
Per-channel precision constant current limiting protection
Bidirectional high-energy surge absorption circuit
Reverse polarity miswiring lockout protection
Real-time detection of contact open-circuit / short-circuit wiring fault
High-precision timestamp fault code real-time upload to master controller
Mechanical Reliability
Continuous vibration resistance 8g (10–150Hz); Shock resistance 25g pulse, 11ms duration
Core Feature: Single module hot swappable under energized rack without interrupting safety interlock loops
Certifications: CE, UL508, IEC60204-1, NRC Class 1E nuclear safety qualification
Aging Validation Standard: 72-hour full-load high-low temperature cyclic aging test
Design Service Life: ≥100,000 hours of 24/7 unattended continuous operation
Warranty Period: 12-month global unified warranty for original factory modules and certified factory refurbished modules
Application Fields
Nuclear Power Plant Common Q Safety I&C Racks
Reinforced isolation discrete signal acquisition terminal for reactor auxiliary cabinets, collecting critical valve position feedback, containment safety door limit switches and primary cooling system equipment interlock contact signals.
AP1000 Nuclear Post-Accident Monitoring System (PAMS)
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Thermal & Hydropower Station Main Control Systems
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High-Risk Explosion-Proof Petrochemical DCS Distributed Control System
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Offshore Oil & Gas Explosion-Proof Automation Racks
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Large Diesel Generator Safety Sequential Control Cabinets
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Municipal Large-Scale Water Treatment Safety Interlock DCS Systems
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Metallurgy & Cement Kiln Production Lines
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