4A07221G07 High Precision Reinforced Isolation Analog Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4A07221G07 High Precision Reinforced Isolation Analog Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

The 4A07221G07 is a nuclear safety certified high-precision analog signal isolation terminal subcard developed for Emerson Westinghouse Common Q Class 1E nuclear safety Instrument & Control platform. It acts as galvanic isolation conversion bridge between field pressure, flow, liquid level, differential pressure transmitters and rack internal analog input acquisition master boards.

Description

1. Product Title

4A07221G07 High Precision Reinforced Isolation Analog Input Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS System

2. Product Brief Introduction

This module supports universal 4–20mA DC current and 0–10V DC voltage analog measurement signals. Each channel is equipped with reinforced high-withstand isolation units, multi-stage LC low-pass EMI filters and bidirectional high-energy surge suppression circuits, which effectively eliminate ground loop potential offset, industrial frequency common-mode interference and lightning transient noise generated by long-distance field cables in nuclear containment, thermal power boiler rooms and petrochemical explosion-proof hazardous zones.

The PCB adopts multi-layer V-0 flame-retardant high-Tg FR-4 substrate, fitted with thickened hard gold-plated backplane gold fingers and anti-corrosion nickel-gold anti-loosening field wiring terminals, maintaining ultra-stable signal transmission accuracy under long-term high-temperature, high-humidity and dusty harsh industrial environments. Every channel integrates independent fast overcurrent fuses, reverse wiring blocking and signal short-circuit automatic isolation; built-in full-channel real-time fault self-diagnosis function uploads timestamped fault codes to the rack diagnostic board for rapid maintenance positioning, without interfering with normal operation of other measuring loops and rack core control equipment. The card supports single-module hot swapping under energized racks to reduce 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, delivering high precision and strong anti-interference performance for safety-critical process parameter measurement racks.

3. Parameter Specification Sheet

Basic Information

Part Number: 4A07221G07
Brand: Emerson / Westinghouse
Product Type: High Precision Reinforced Isolation Analog Input Field Terminal Daughter Card
Compatible Platform: Common Q Class 1E Safety Instrument & Control DCS System
Matching Supporting Modules: Analog 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 screw-type field wiring terminals
Overall Dimensions: 120mm × 66mm × 20.5mm
Net Weight: 57g
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 & Analog Signal Performance

Rated Supply Voltage: DC 12V / DC 24V dual wide 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 Transmission Precision: ±0.05% full scale
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 surge transient absorption, reverse wiring blocking, signal short-circuit automatic cut-off, ground potential difference suppression, real-time channel drift/open-circuit fault detection and timestamped fault code upload
Hot Swap Operation Rule: Single analog input terminal card supports hot plug replacement; remaining measuring channels maintain uninterrupted real-time data 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 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 high-precision process 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

Nuclear power plant Common Q Class 1E safety I&C system, high-precision analog signal terminal for reactor protection cabinet coolant flow, pressure and liquid level transmitters
AP1000 nuclear Post-Accident Monitoring System (PAMS), containment multi-point process pressure, flow measurement signal conversion and diagnostic interface board
Thermal power & hydropower stations, boiler steam pressure, feedwater flow, flue gas differential pressure transmitter high-stability signal acquisition terminal module
Petrochemical explosion-proof DCS distributed control system, high-risk reactor pressure, pipeline flow anti-surge analog wiring card
Offshore oil & gas platform explosion-proof safety automation rack, wellhead pressure, oil-water liquid level transmitter high-precision signal isolation board
Large diesel generator safety sequential control cabinet, fuel pressure, cooling water flow analog input subcard
Municipal large-scale water treatment safety interlock DCS rack, pipeline flow, tank liquid level sensor reinforced isolation terminal board
Metallurgy & cement kiln-furnace production line, furnace pressure, flue gas flow measuring instrument high-precision signal acquisition interface module

Content Verification Note

Confirmed fixed factual information: 4A07221G07 is Emerson Common Q series upgraded high-precision analog input terminal daughter card, 1800V reinforced per-channel isolation, enhanced surge suppression and full-channel timestamp fault self-diagnosis, single-module hot swappable, 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

4A07221G07 16-Channel High Precision Analog Input Terminal Card for Class 1E Nuclear DCS
4A07221G07 Common Q Nuclear-Grade Reinforced Isolation AI Field Signal Interface Daughter Card
4A07221G07 High Accuracy Analog Measurement Wiring Terminal Board for Nuclear Safety I&C Rack

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