4D33811G01 Standard 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

4D33811G01 Standard 12-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS

NRC Class 1E nuclear safety certified, the 4D33811G01 is a compact standard isolated transistor discrete output terminal daughter card developed for Emerson Westinghouse Common Q nuclear safety I&C platform. It converts digital logic commands from master logic boards into isolated switching drive signals to actuate nuclear auxiliary safety equipment including solenoid isolation valves, accident alarm annunciators, small safety contactors and low-power field actuators. Each channel adopts independent 1500V basic galvanic isolation and multi-stage LC passive EMI filter network to suppress power frequency coupled noise, ground loop potential offset and lightning surge transient interference. Equipped with standard hard gold-plated backplane edge connectors and corrosion-resistant nickel screw terminal blocks, this board integrates full per-channel multi-layer circuit protection, output loop open/short-circuit load fault diagnosis and complete hot-swap capability. Online module replacement is supported without interrupting running safety control loops, adapting to high temperature, high humidity, heavy dust operating environments inside nuclear auxiliary equipment rooms.

Description

Parameter Specifications

Part Number: 4D33811G01
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 isolated V-0 flame-retardant high-Tg FR-4
Dimension & Weight: 120mm × 66mm × 20.6mm; Net weight: 58g
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
Output Channels: 12 fully independent galvanic isolated discrete output channels
Drive Type: Isolated transistor sinking/sourcing switching output for low-power safety loads
Per-channel Continuous Rated Load Current: 0.7A
Isolation Performance
Channel-to-backplane isolation: 1500V AC
Dielectric withstand: 2000V AC / 60s
Insulation resistance: ≥1200MΩ @ 500VDC
EMC Index: Power frequency interference attenuation ≥40dB, compliant with IEC 61000-6-2 industrial EMC standard
Protection & Diagnosis Functions
Per-channel precise current limiting protection
Bidirectional TVS high-energy surge absorption
Reverse polarity miswiring lockout protection
Real-time detection of output loop open-circuit / short-circuit load fault
Time-stamped fault status uploaded to master controller
Mechanical Reliability
Continuous vibration resistance: 8g (10–150Hz)
Shock resistance: 25g pulse, duration 11ms
Core Feature: Single-module hot swappable under energized rack
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: 12-month global unified warranty for original & factory refurbished modules

Application Fields

Nuclear Power Plant Common Q Safety I&C Racks
Standard discrete drive terminal for reactor auxiliary cabinets, driving cooling system isolation solenoid valves, local accident warning lights and auxiliary safety control contactors.
AP1000 Nuclear Post-Accident Monitoring System (PAMS)
Isolated switching output board for containment auxiliary vent isolation valves and full-set accident annunciator alarm devices.
Thermal & Hydropower Station Main Control Systems
Compact DO output module for boiler emergency drain solenoid valves, flue gas safety isolation dampers and unit fault alarm buzzers.
Explosion-Proof Petrochemical DCS Distributed Control System
Field drive wiring terminal card for reactor emergency shut-off solenoid valves, storage tank over-limit alarm horns and process pump auxiliary contactors.
Offshore Oil & Gas Explosion-Proof Automation Racks
Isolation drive interface for wellhead ESD emergency shutdown solenoids, platform multi-stage warning light banks and heating equipment control contactors.
Large Diesel Generator Safety Sequential Control Cabinets
Discrete output subcard for unit emergency stop solenoids, critical machinery fault alarm horns and cooling water pump control contactors.
Municipal Large-Scale Water Treatment Safety Interlock DCS
Isolation switching drive terminal for pipeline inlet emergency shut-off solenoids, chemical dosing equipment contactors and sedimentation tank overflow alarm devices.
Metallurgy & Cement Kiln Production Lines
Multi-point 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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