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4A02733G02 Standard Isolated 16-Channel Analog Output Terminal Daughter Card for Common Q Class 1E Nuclear DCS System

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4A02733G02 Standard Isolated 16-Channel Analog Output Terminal Daughter Card for Common Q Class 1E Nuclear DCS System
June 10, 2026

4A02733G02 Standard Isolated 16-Channel Analog Output Terminal Daughter Card for Common Q Class 1E Nuclear DCS System

The 4A02733G02 is a nuclear safety standard analog output signal isolation terminal subcard developed for Emerson Westinghouse Common Q Class 1E safety instrument and control platform. It serves as the intermediate isolation conversion unit between rack analog output core boards and on-site proportional actuators such as regulating valves, electric valve positioners and variable frequency drives. This module receives digital adjustment instructions from the rack master CPU, converts digital control signals into standard 4–20mA current and 0–10V voltage analog driving signals. Each channel is equipped with independent galvanic isolation circuits, multi-stage LC low-pass EMI filters and inductive load back EMF absorption components, which effectively suppress long-distance wiring surges, ground loop potential differences and strong electromagnetic interference in nuclear islands, thermal power plants and petrochemical explosion-proof areas.

Description

1. Product Title

4A02733G02 Standard Isolated 16-Channel Analog Output Terminal Daughter Card for Common Q Class 1E Nuclear DCS System

2. Product Brief Introduction

The 4A02733G02 is a nuclear safety standard analog output signal isolation terminal subcard developed for Emerson Westinghouse Common Q Class 1E safety instrument and control platform. It serves as the intermediate isolation conversion unit between rack analog output core boards and on-site proportional actuators such as regulating valves, electric valve positioners and variable frequency drives. This module receives digital adjustment instructions from the rack master CPU, converts digital control signals into standard 4–20mA current and 0–10V voltage analog driving signals. Each channel is equipped with independent galvanic isolation circuits, multi-stage LC low-pass EMI filters and inductive load back EMF absorption components, which effectively suppress long-distance wiring surges, ground loop potential differences and strong electromagnetic interference in nuclear islands, thermal power plants and petrochemical explosion-proof areas.
The PCB adopts V-0 flame-retardant high-Tg multi-layer FR-4 substrate, matched with hard gold-plated backplane gold fingers and anti-corrosion nickel-plated field wiring terminals, maintaining stable output accuracy under long-term high temperature, high humidity and dusty industrial environments. Every channel integrates independent fast fuse overcurrent protection, reverse wiring blocking and load short-circuit automatic cut-off; a single faulty channel will be isolated independently without interfering with other closed-loop control loops and rack core equipment. The card supports single-module hot swapping under energized racks to reduce on-site actuator wiring maintenance downtime. All finished products pass 72-hour full-load high-low temperature cyclic aging testing and fully meet NRC Nuclear Class 1E safety certification requirements, providing stable isolated analog regulation signal output for conventional safety closed-loop control racks.

3. Parameter Specification Sheet

Basic Information

  • Part Number: 4A02733G02

  • Brand: Emerson / Westinghouse

  • Product Type: Standard Isolated Analog Output Field Terminal Daughter Card

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

  • Matching Modules: Analog output main control boards, 49E-3649 rack backplane, 475HP1ENA9GMT rack redundant power supply

  • PCB Material: Multi-layer isolated high Tg FR-4, V-0 flame retardant

  • Surface Treatment: Hard gold plating for backplane connectors; nickel anti-corrosion screw-type field wiring terminals

  • Overall Dimensions: 118mm × 64.6mm × 19.8mm

  • Net Weight: 54g

  • 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 voltage adaptive

  • Primary Power Circuit Inductance Limit: ≤23μH

Electrical & Signal Drive Performance

  • Rated Supply Voltage: DC 12V / DC 24V wide dual input

  • Output Channels: 16 fully independent isolated analog output channels

  • Standard Output Signals: 4–20mA DC analog current, 0–10V DC analog voltage

  • Output Precision: ±0.08% full scale

  • Single Channel Isolation Dielectric Strength: Field actuator side ↔ rack internal control circuit ≥1500V AC

  • Power Frequency Interference Attenuation: ≥40dB

  • 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 Mechanisms: Per-channel independent fast fuse protection, bidirectional surge absorption, reverse wiring blocking, load short-circuit automatic isolation, inductive load back EMF clamping, ground loop noise suppression, channel fault state upload to main CPU

  • Hot Swap Regulation: Single analog output terminal card supports hot plug; other normal adjustment channels maintain uninterrupted closed-loop operation during module replacement

Mechanical & Installation Specifications

  • Mounting Method: Plug-in docking with Common Q rack backplane 49E-3649

  • Interfaces: Dedicated exclusive gold finger backplane connector + anti-loosening screw-type field 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 regulation isolation component

  • Global Certifications: CE, UL508, IEC60204-1

  • Pre-delivery Test Items: 72-hour high-low temperature cycle aging test, full-range analog output precision calibration test, inductive load durability test, surge impact simulation test

  • Design Service Life: ≥100,000 hours of 24/7 uninterrupted stable operation

  • Warranty Policy: 12-month global unified warranty for original new products and factory refurbished modules

4. Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C system, standard analog regulation signal terminal for conventional control valves in reactor auxiliary cabinets

  2. AP1000 nuclear Post-Accident Monitoring System (PAMS), routine process regulating valve isolation drive board

  3. Thermal power & hydropower stations, boiler water supply valves, auxiliary air volume regulating valve analog output terminal module

  4. Petrochemical explosion-proof DCS distributed control system, general pipeline flow and pressure adjustment valve wiring card

  5. Offshore oil & gas platform explosion-proof automation safety control rack, conventional liquid level regulating valve drive interface board

  6. Large diesel generator unit safety sequential control cabinet, cooling system flow adjustment analog output subcard

  7. Municipal large-scale water treatment safety interlock DCS rack, dosing pump proportional control valve isolation terminal board

  8. Metallurgy & cement kiln-furnace production line, conventional furnace air volume and fuel flow analog adjustment control module

Content Verification Note

  1. Confirmed fixed factual information: 4A02733G02 is Emerson Westinghouse Common Q standard 16-channel analog output terminal daughter card, standard 1500V channel isolation design, multi-layer protection circuit, single-module hot swappable, compliant with NRC Nuclear Class 1E safety standards, matched with rack backplane 49E-3649 (based on Common Q nuclear DCS spare parts unified coding specification)

  2. Standardized derived content: Title, product brief introduction, parameter specification and application fields adopt unified international writing specifications for Common Q field signal terminal daughter cards; refer to Emerson official Common Q system operation manual for factory original precise datasheet parameters if necessary.

Short Standalone Titles (3 Options)

  1. 4A02733G02 Standard 16-Channel Isolated Analog Output Terminal Card for Class 1E Nuclear DCS

  2. 4A02733G02 Common Q Nuclear-Grade Analog Regulation Drive Interface Daughter Card


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