4D33811G02 Upgraded Reinforced 12-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4D33811G02 Upgraded Reinforced 12-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS

Fully certified to NRC Class 1E nuclear safety standards, the 4D33811G02 is a reinforced upgraded discrete transistor output terminal daughter card optimized based on the standard 4D33811G01 for Emerson Westinghouse Common Q safety I&C platform. It converts digital logic commands from master logic boards into reinforced galvanic isolated switching signals to drive critical nuclear safety loads, including primary isolation solenoid valves, accident multi-stage alarm annunciators, safety-grade auxiliary control contactors and low-power nuclear safety actuators.

Description

Parameter Specifications

Part Number: 4D33811G02
Manufacturer: Emerson Westinghouse
Compatible System: Common Q Class 1E Safety Instrument & Control DCS System
Matching Accessories: Discrete output master logic 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 wide-range adaptive input
Output Channels: 12 fully independent galvanic isolated discrete output channels
Drive Topology: Isolated transistor sinking/sourcing switching output for nuclear-grade low-power safety field loads
Per-Channel Continuous Rated Load Current: 0.7A
Isolation Index
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 high-precision constant current limiting protection
- Bidirectional high-energy surge absorption circuit
- Reverse wiring polarity lockout protection
- Real-time detection of output loop open-circuit / short-circuit load fault
- High-precision time-stamped 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 control 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 safety switching drive terminal for reactor auxiliary cabinets, driving critical cooling system isolation solenoid valves, containment local accident warning light arrays and primary safety-grade auxiliary control contactors.
AP1000 Nuclear Post-Accident Monitoring System (PAMS)
High anti-interference isolated switching output board for containment core isolation vent valves and reactor core full-set accident annunciator alarm devices.
Thermal & Hydropower Station Main Control Systems
Upgraded discrete output module for boiler emergency cut-off drain solenoid valves, main flue gas safety isolation dampers and unit primary critical fault alarm buzzers.
High-Risk Explosion-Proof Petrochemical DCS Distributed Control System
Premium safety drive wiring card for reactor emergency shutdown solenoid valves, storage tank overpressure safety alarm horns and main process pump primary control contactors.
Offshore Oil & Gas Explosion-Proof Automation Racks
Anti-vibration stable safety isolation drive interface for wellhead ESD emergency shutdown solenoids, platform multi-level warning light banks and heating system main control contactors.
Large Diesel Generator Safety Sequential Control Cabinets
Discrete output subcard for unit emergency stop solenoids, core mechanical fault alarm horns and cooling water main pump control contactors.
Municipal Large-Scale Water Treatment Safety Interlock DCS Systems
Reinforced isolation switching drive terminal for pipeline inlet emergency shut-off solenoids, chemical dosing main equipment control contactors and sedimentation tank overflow safety alarm devices.
Metallurgy & Cement Kiln Production Lines
High-reliability safety discrete drive module for kiln high-temperature isolation solenoids, dust removal primary fan control contactors and kiln over-temperature protection alarm horns

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