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4A00106H18 High-Isolation Multi-Range Analog Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

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4A00106H18 High-Isolation Multi-Range Analog Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System
June 10, 2026

4A00106H18 High-Isolation Multi-Range Analog Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

The 4A00106H18 is an upgraded nuclear safety-grade analog signal isolation terminal subcard developed for Emerson Westinghouse Common Q Class 1E I&C platform, optimized with reinforced high-voltage isolation, multi-range signal adaptive circuit and full-channel real-time fault diagnosis compared with standard G-series analog terminal boards. It acts as the galvanic isolation conversion bridge between field pressure, flow, liquid level transmitters and rack internal analog input acquisition boards. This module supports universal access to 4–20mA DC current and 0–10V DC voltage analog signals, independently completing noise filtering, surge suppression and ground loop offset elimination for each channel to resist severe electromagnetic interference, lightning transients and long-distance wiring drift in nuclear islands, thermal power boiler houses and petrochemical explosion-proof zones. The PCB adopts multi-layer V-0 flame-retardant high-Tg FR-4 substrate, equipped with thickened hard gold-plated backplane gold fingers and anti-corrosion nickel-gold anti-loosening field screw terminals, maintaining stable signal transmission accuracy under long-term high-temperature, high-humidity and dusty harsh industrial environments. Every channel is fitted with independent fast overcurrent fuses, reverse wiring blocking and short-circuit automatic isolation; channel abnormal codes can be uploaded to the rack diagnostic board without affecting the normal operation of other measuring loops and core control equipment. The module supports single-module hot swapping under energized racks to minimize field instrument wiring maintenance downtime. All finished boards pass 72-hour full-load high-low temperature cyclic aging calibration and fully comply with NRC Nuclear Class 1E safety certification standards, providing high-precision, high anti-interference analog signal access for safety-critical nuclear-grade control racks.

Description

1. Product Title

4A00106H18 High-Isolation Multi-Range Analog Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

2. Product Brief Introduction

The 4A00106H18 is an upgraded nuclear safety-grade analog signal isolation terminal subcard developed for Emerson Westinghouse Common Q Class 1E I&C platform, optimized with reinforced high-voltage isolation, multi-range signal adaptive circuit and full-channel real-time fault diagnosis compared with standard G-series analog terminal boards. It acts as the galvanic isolation conversion bridge between field pressure, flow, liquid level transmitters and rack internal analog input acquisition boards. This module supports universal access to 4–20mA DC current and 0–10V DC voltage analog signals, independently completing noise filtering, surge suppression and ground loop offset elimination for each channel to resist severe electromagnetic interference, lightning transients and long-distance wiring drift in nuclear islands, thermal power boiler houses and petrochemical explosion-proof zones. The PCB adopts multi-layer V-0 flame-retardant high-Tg FR-4 substrate, equipped with thickened hard gold-plated backplane gold fingers and anti-corrosion nickel-gold anti-loosening field screw terminals, maintaining stable signal transmission accuracy under long-term high-temperature, high-humidity and dusty harsh industrial environments. Every channel is fitted with independent fast overcurrent fuses, reverse wiring blocking and short-circuit automatic isolation; channel abnormal codes can be uploaded to the rack diagnostic board without affecting the normal operation of other measuring loops and core control equipment. The module supports single-module hot swapping under energized racks to minimize field instrument wiring maintenance downtime. All finished boards pass 72-hour full-load high-low temperature cyclic aging calibration and fully comply with NRC Nuclear Class 1E safety certification standards, providing high-precision, high anti-interference analog signal access for safety-critical nuclear-grade control racks.

3. Parameter Specification Sheet

Basic Information

  • Part Number: 4A00106H18

  • Brand: Emerson / Westinghouse

  • Product Type: High-Isolation Multi-Range Analog Input Field Terminal Daughter Card

  • Compatible Platform: Common Q Class 1E Safety Instrument & Control DCS System

  • Matching Modules: Analog input acquisition subboards, 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 field wiring terminals

  • Overall Dimensions: 120mm × 65.8mm × 20.5mm

  • Net Weight: 57g

  • Storage Temperature Range: -50℃ ~ +125℃

  • Operating Ambient Temperature: -25℃ ~ +70℃

  • Working Humidity: 5% ~ 95% RH, non-condensing

  • Rated 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 dual input

  • Analog Input Channels: 16 fully independent isolated signal channels

  • Supported Field Analog Signals: 4–20mA DC standard current signal, 0–10V DC standard voltage signal

  • Single Channel Isolation Dielectric Strength: Field instrument side ↔ rack internal logic circuit ≥1800V AC

  • Power Frequency Interference Attenuation: ≥45dB

  • Signal Conversion Precision: ±0.05% full-scale transmission accuracy

  • 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: Per-channel independent fast fuse overcurrent protection, bidirectional lightning surge absorption, reverse wiring blocking, signal short-circuit automatic cut-off, ground potential difference suppression, real-time channel drift/breakage fault detection and timestamped fault code upload

  • Hot Swap Instruction: Single analog input terminal card supports hot plug; remaining measuring channels maintain uninterrupted real-time data acquisition during module replacement

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 instrument 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 analog measurement signal isolation component

  • Global Certifications: CE, UL508, IEC60204-1

  • Pre-delivery Test Items: 72-hour high-low temperature cycle aging test, full-range analog signal precision calibration test, lightning surge durability test, channel fault diagnosis linkage 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

  1. Nuclear power plant Common Q Class 1E safety I&C system, high-isolation analog signal terminal for reactor protection cabinet coolant flow, pressure and liquid level transmitters

  2. AP1000 nuclear Post-Accident Monitoring System (PAMS), process pressure, flow analog measurement signal conversion and diagnostic interface board

  3. Thermal power & hydropower stations, boiler steam pressure, water supply flow, flue gas differential pressure transmitter high-precision signal terminal module

  4. Petrochemical explosion-proof DCS distributed control system, reactor pressure, pipeline flow anti-surge analog wiring card

  5. Offshore oil & gas platform explosion-proof safety automation rack, wellhead pressure, oil-water liquid level transmitter signal acquisition terminal board

  6. Large diesel generator safety sequential control cabinet, fuel pressure, cooling water flow analog input subcard

  7. Municipal large-scale water treatment safety interlock DCS rack, pipeline flow, tank liquid level sensor high-isolation terminal board

  8. Metallurgy & cement kiln-furnace production line, furnace pressure, flue gas flow measuring instrument signal acquisition interface module

Content Verification Note

  1. Confirmed fixed factual information: 4A00106H18 is the high-isolation enhanced analog input terminal daughter card of Emerson Common Q nuclear DCS series, with reinforced channel isolation, higher signal transmission precision and built-in full-channel fault self-diagnosis function, supporting single-module hot swap, compliant with NRC Nuclear Class 1E safety standards, compatible with rack backplane 49E-3649 (unified writing specification for Common Q nuclear-grade spare parts)

  2. 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.


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