4D33810G01 Standard 12-Channel Isolated Discrete Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4D33810G01 Standard 12-Channel Isolated Discrete Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS

NRC Class 1E nuclear safety certified, the 4D33810G01 is a compact standard isolated discrete dry contact input terminal daughter card developed for Emerson Westinghouse Common Q nuclear safety I&C platform. It collects passive dry contact feedback signals from on-site safety limit switches, valve position feedback switches, equipment interlock contacts and trip devices for nuclear auxiliary safety monitoring logic judgment.

Description

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 drift and lightning surge transient interference. Equipped with standard hard gold-plated backplane edge connectors and corrosion-resistant nickel screw terminal blocks, this daughter card integrates full per-channel multi-layer circuit protection, contact open/short-circuit fault diagnosis and complete hot-swap capability. Online module replacement is supported without interrupting safety interlock logic loops, adapting to high temperature, high humidity, heavy dust operating environments inside nuclear auxiliary equipment rooms.

Parameter Specifications

Part Number: 4D33810G01
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 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
Input Channels: 12 fully independent galvanic isolated discrete input channels
Supported Signal: Passive dry contact signal (valve feedback, safety limit switches, relay interlock contacts, trip switches)
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 contact open-circuit / short-circuit wiring 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 signal acquisition terminal for reactor auxiliary cabinets, used to collect valve position feedback, safety gate limit switches and equipment interlock contact signals of auxiliary cooling systems.
AP1000 Nuclear Post-Accident Monitoring System (PAMS)
Isolated discrete signal conversion board for containment auxiliary equipment interlock switches, vent valve feedback contacts and accident trip device signals.
Thermal & Hydropower Station Main Control Systems
Compact DI input module for boiler furnace safety interlock switches, drain valve feedback contacts and turbine protection trip switches.
Explosion-Proof Petrochemical DCS Distributed Control System
Field wiring terminal card for reactor emergency interlock contacts, shut-off valve position feedback and tank over-limit trip switches.
Offshore Oil & Gas Explosion-Proof Automation Racks
Isolation signal acquisition interface for wellhead ESD valve feedback, platform safety door limit switches and separator interlock contacts.
Large Diesel Generator Safety Sequential Control Cabinets
Discrete input subcard for unit overspeed trip switches, cooling system fault interlock contacts and emergency stop feedback signals.
Municipal Large-Scale Water Treatment Safety Interlock DCS
Isolation measurement terminal for pipeline gate limit switches, overflow interlock contacts and dosing equipment fault feedback signals.
Metallurgy & Cement Kiln Production Lines
Multi-point discrete acquisition module for kiln safety door interlock contacts, dust removal equipment trip switches and high-temperature protection limit signals.

Contact Info