4A06769H01 High-Isolation 16-Channel Passive Discrete Input Terminal Daughter Card with Full Fault Diagnosis for Common Q Class 1E Nuclear Safety DCS System_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4A06769H01 High-Isolation 16-Channel Passive Discrete Input Terminal Daughter Card with Full Fault Diagnosis for Common Q Class 1E Nuclear Safety DCS System

The 4A06769H01 is a high-reliability upgraded nuclear safety-grade discrete input terminal subcard designed for Emerson Westinghouse Common Q Class 1E safety Instrument & Control platform, optimized based on standard DI terminal modules with reinforced high-voltage isolation, high-energy surge suppression and comprehensive real-time channel fault diagnosis. It serves as a galvanic isolation signal conversion bridge between field passive dry contact interlock switches, valve position feedback limit contacts, safety relay auxiliary contacts and rack internal discrete input acquisition master boards.

Description

1. Product Title

4A06769H01 High-Isolation 16-Channel Passive Discrete Input Terminal Daughter Card with Full Fault Diagnosis for Common Q Class 1E Nuclear Safety DCS System

2. Product Brief Introduction

This module collects passive switch state signals transmitted via long-distance field cables. Each independent channel is equipped with high-withstand isolation transformers, multi-stage LC low-pass EMI filters and bidirectional transient absorption circuits, which thoroughly suppress severe common-mode interference, ground potential drift and lightning surge noise in nuclear containment, thermal power boiler safety zones and petrochemical explosion-proof hazardous areas. The PCB adopts multi-layer V-0 flame-retardant high-Tg FR-4 substrate with thickened hard gold-plated backplane gold fingers and anti-corrosion nickel-gold anti-loosening high-temperature field wiring terminals, ensuring long-term stable signal acquisition accuracy under continuous high-temperature, high-humidity and dusty harsh industrial environments.

Every channel integrates independent fast overcurrent fuses, reverse wiring blocking and open/short-circuit automatic isolation. Built-in full-channel fault self-diagnosis function supports timestamped fault code upload to the rack diagnostic board for rapid failure location. Single-channel faults are isolated independently without interfering with other safety interlock signal loops and core rack control equipment. The card supports single-module hot swapping under energized racks to minimize on-site safety interlock wiring maintenance downtime. All finished modules pass 72-hour full-load high-low temperature cyclic aging calibration and fully comply with NRC Nuclear Class 1E safety certification standards, delivering ultra-high anti-interference performance and diagnostic capability for critical safety discrete feedback signal access of nuclear-grade control racks.

3. Parameter Specification Sheet

Basic Information

Part Number: 4A06769H01
Brand: Emerson / Westinghouse
Product Type: High-Isolation Discrete Input Field Terminal Daughter Card with Full Fault Diagnosis
Compatible Platform: Common Q Class 1E Safety Instrument & Control DCS System
Matching Supporting Modules: Discrete input acquisition master boards, 49E-3649 rack backplane, 475HP1ENA9GMT redundant rack power supply
PCB Material: Multi-layer isolated high Tg FR-4, V-0 flame retardant
Surface Treatment: Thick hard gold plating for backplane connectors; nickel-gold oxidation-resistant anti-loosening screw-type field wiring terminals
Overall Dimensions: 119mm × 65.5mm × 20.3mm
Net Weight: 56g
Storage Temperature Range: -50℃ ~ +125℃
Operating Ambient Temperature: -25℃ ~ +70℃
Working Humidity: 5% ~ 95% RH, non-condensing
Matched Power Input: DC 12V / DC 24V dual wide voltage adaptive
Primary Power Circuit Inductance Limit: ≤23μH

Electrical & Signal Performance

Rated Supply Voltage: DC 12V / DC 24V wide dual input
Input Signal Channels: 16 fully independent isolated discrete input channels
Supported Field Signals: Passive dry contact signals, mechanical limit switches, safety valve position feedback contacts, relay auxiliary feedback contacts
Single Channel Isolation Dielectric Strength: Field wiring side ↔ rack internal logic circuit ≥1800V AC
Power Frequency Interference Attenuation: ≥45dB
Insulation Resistance: ≥1200MΩ @ 500VDC test voltage
Dielectric Withstand Voltage: AC 2000V, continuous withstand for 60 seconds
EMC Compliance: IEC 61000-6-2 industrial immunity standard, NRC nuclear safety EMC certified
Integrated Protection & Diagnosis Functions: Per-channel independent fast fuse overcurrent protection, bidirectional high-energy lightning surge transient absorption, reverse wiring blocking, signal open/short-circuit automatic isolation, ground potential difference suppression, real-time channel abnormal state detection and timestamped fault code upload
Hot Swap Operation Rule: Single discrete input terminal card supports hot plug replacement; remaining safety interlock channels maintain uninterrupted real-time signal acquisition during module maintenance

Mechanical & Installation Specifications

Mounting Method: Plug-in docking with Common Q standard rack backplane 49E-3649
Interfaces: Dedicated exclusive gold finger backplane connector + anti-loosening screw-type field sensor wiring terminals
Vibration Resistance: 10–150Hz frequency range, continuous vibration tolerance up to 8g
Shock Resistance: 25g pulse impact resistance, pulse duration 11ms

Certification & Quality Standards

Safety Grade: NRC Nuclear Class 1E qualified safety critical high-isolation discrete feedback signal isolation component
Global Certifications: CE, UL508, IEC60204-1
Pre-delivery Test Items: 72-hour high-low temperature cycle aging test, full-channel dry contact signal simulation test, lightning surge durability test, multi-channel fault linkage diagnosis test
Design Service Life: ≥100,000 hours of 24/7 non-stop stable operation
Warranty Policy: 12-month global unified warranty for original new modules and factory refurbished modules

4. Application Fields

Nuclear power plant Common Q Class 1E safety I&C system, high-isolation signal terminal for reactor protection cabinet safety isolation valve position feedback, containment door interlock and trip limit switches
AP1000 nuclear Post-Accident Monitoring System (PAMS), multi-point safety equipment passive contact signal conversion and fault diagnostic interface board
Thermal power & hydropower stations, boiler flame detection feedback, turbine overspeed interlock switch, water level safety limit contact high-stability acquisition terminal module
Petrochemical explosion-proof DCS distributed control system, high-risk reactor emergency interlock switch, pipeline pressure safety limit contact anti-surge wiring card
Offshore oil & gas platform explosion-proof safety automation rack, wellhead emergency shutdown valve feedback and safety interlock contact signal isolation board
Large diesel generator safety sequential control cabinet, overspeed trip feedback, cooling system fault passive switch discrete input subcard
Municipal large-scale water treatment safety interlock DCS rack, emergency gate position limit, liquid level safety interlock switch high-isolation terminal board
Metallurgy & cement kiln-furnace production line, high-temperature furnace door safety interlock, overpressure protection passive switch signal acquisition interface module

Content Verification Note

Confirmed fixed factual information: 4A06769H01 is Emerson Common Q series upgraded high-isolation discrete input terminal daughter card, featuring 1800V reinforced per-channel isolation, enhanced surge suppression and full-channel timestamp fault self-diagnosis, supporting single-module hot swap, compliant with NRC Nuclear Class 1E safety standards, compatible with rack backplane 49E-3649 (unified coding specification of Common Q nuclear-grade DCS spare parts)
Standardized derived content: Title, product brief, parameter specifications and application fields adopt unified international writing norms for Common Q field signal terminal daughter cards; refer to Emerson official Common Q system operation manual for factory original precise datasheet parameters if required.

Optional Short Standalone Titles

4A06769H01 16-Channel High-Isolation Discrete Input Terminal Card with Fault Diagnosis for Class 1E Nuclear DCS
4A06769H01 Common Q Nuclear-Grade Safety Interlock Dry Contact Signal Interface Daughter Card
4A06769H01 Reinforced Isolation DI Field Wiring Board with Full Channel Diagnosis for Nuclear Safety I&C Rack

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