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4625B61G01

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4625B61G01
June 10, 2026

4625B61G01

The 4625B61G01 is a safety-grade dedicated coprocessor board independently developed for Emerson Westinghouse Common Q Class 1E nuclear safety I&C platform, serving as a redundant logic operation auxiliary core matched with the main CPU 4620B91G01. It undertakes independent parallel execution of safety interlock protection logic, trip judgment and fault voting algorithms, realizing dual-channel cross-check with the main control CPU to meet nuclear safety fault-tolerant design requirements. The board collects real-time status signals from all I/O subcards via the internal IGI highway bus, independently completes safety protection logic calculation, and outputs interlock trip commands once abnormal process conditions are detected. Built-in hardware dual-redundant arithmetic units, multi-stage EMI filter and high-intensity surge suppression circuits, it maintains stable logical judgment under strong electromagnetic interference sites such as nuclear islands, thermal power boiler rooms and petrochemical explosion-proof areas. The PCB adopts V-0 flame-retardant high-Tg FR-4 substrate with full hard gold-plated backplane gold fingers to guarantee long-term anti-oxidation and reliable plug-in performance. It integrates multi-layer protection circuits including overvoltage, reverse polarity and bus short-circuit current limiting, and supports single-module hot swapping under energized racks for redundant system bumpless switching. All finished units pass 96-hour full-load high-low temperature cyclic aging screening and obtain NRC Nuclear Class 1E safety certification, providing independent fault-tolerant safety logic calculation for safety-critical distributed control racks.

Description

1. Product Title

4625B61G01 Redundant Safety Logic Coprocessor Board for Common Q Class 1E Nuclear DCS System

2. Product Brief Introduction

The 4625B61G01 is a safety-grade dedicated coprocessor board independently developed for Emerson Westinghouse Common Q Class 1E nuclear safety I&C platform, serving as a redundant logic operation auxiliary core matched with the main CPU 4620B91G01. It undertakes independent parallel execution of safety interlock protection logic, trip judgment and fault voting algorithms, realizing dual-channel cross-check with the main control CPU to meet nuclear safety fault-tolerant design requirements. The board collects real-time status signals from all I/O subcards via the internal IGI highway bus, independently completes safety protection logic calculation, and outputs interlock trip commands once abnormal process conditions are detected. Built-in hardware dual-redundant arithmetic units, multi-stage EMI filter and high-intensity surge suppression circuits, it maintains stable logical judgment under strong electromagnetic interference sites such as nuclear islands, thermal power boiler rooms and petrochemical explosion-proof areas. The PCB adopts V-0 flame-retardant high-Tg FR-4 substrate with full hard gold-plated backplane gold fingers to guarantee long-term anti-oxidation and reliable plug-in performance. It integrates multi-layer protection circuits including overvoltage, reverse polarity and bus short-circuit current limiting, and supports single-module hot swapping under energized racks for redundant system bumpless switching. All finished units pass 96-hour full-load high-low temperature cyclic aging screening and obtain NRC Nuclear Class 1E safety certification, providing independent fault-tolerant safety logic calculation for safety-critical distributed control racks.

3. Parameter Specification Sheet

Basic Information

  • Part Number: 4625B61G01

  • Brand: Emerson / Westinghouse

  • Product Type: Safety Redundant Logic Coprocessor Board

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

  • Matching Master CPU: 4620B91G01 Main Control CPU Board

  • Matching Power Supply: 4535V60A35 Dual Output Rack Power Module

  • PCB Material: High Tg FR-4, V-0 flame retardant

  • Surface Treatment: Hard gold plating for backplane connectors, matte green anti-oxidation solder mask

  • Overall Dimension: 134mm × 71.5mm × 23.8mm

  • Net Weight: 76g

  • Storage Temperature: -50℃ ~ +125℃

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

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

  • Primary Power Circuit Inductance Limit: ≤23μH

Computing & Electrical Performance

  • Rated Supply Voltage: DC 12V / DC 24V dual voltage adaptive

  • Core Configuration: Dual redundant safety arithmetic processors with cross-check voting function

  • Independent Logic Scan Cycle: ≤1.0ms safety interlock logic cycle

  • Internal Bus Channel: Dual isolated IGI highway bus interfaces

  • Data Cross-Verification: Real-time bidirectional data comparison with main CPU for consistency judgment

  • Onboard Storage: Non-volatile memory for safety logic program, trip event timestamp logs

  • Circuit Isolation Strength: Logic core circuit to signal bus ≥1800V AC reinforced isolation

  • Insulation Resistance: ≥1200MΩ @ 500VDC test voltage

  • Dielectric Withstand Voltage: AC 2000V, continuous withstand for 60 seconds

  • EMC Compliance: IEC 61000-6-2 industrial anti-interference standard, NRC nuclear safety EMC certified

  • Integrated Protection: Overvoltage transient suppression, reverse power blocking, bus short-circuit automatic current limiting, hardware watchdog automatic reset, over-temperature shutdown protection

  • Hot Swap Rule: Single coprocessor module supports hot plug under dual redundant configuration; safety core logic will not be interrupted during replacement

Mechanical & Installation Specifications

  • Mounting Method: Plug-in docking with Common Q rack carrier backplane

  • Bus Interface: Exclusive Common Q gold finger backplane connector + dual IGI internal bus expansion ports

  • Vibration Resistance: 10–150Hz frequency range, continuous anti-vibration up to 8g

  • Shock Resistance: 25g pulse impact resistance, pulse duration 11ms

Certification & Quality Standards

  • Safety Grade: NRC Nuclear Class 1E qualified safety critical auxiliary control component

  • Global Certifications: CE, UL508, IEC60204-1

  • Pre-delivery Test: 96h full-load high-low temperature cycle aging test + main-coprocessor cross-verification linkage simulation test

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

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

4. Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C system, redundant safety interlock logic operation board for reactor protection cabinets

  2. AP1000 post-accident monitoring system (PAMS), independent trip judgment and fault voting auxiliary core

  3. Thermal power & hydropower plants, boiler/turbine safety protection rack redundant coprocessor for emergency trip logic

  4. Petrochemical explosion-proof DCS system, independent safety interlock calculation unit of hazardous process control cabinets

  5. Offshore oil & gas platform explosion-proof safety automation rack redundant safety logic processing board

  6. Large diesel generator set safety sequential control cabinet emergency protection independent arithmetic module

  7. Municipal large-scale water treatment plant safety interlock DCS rack fault judgment and trip command output core

  8. Metallurgy & cement heavy industry kiln-furnace production line over-temperature, over-pressure safety protection logic coprocessor

Content Verification Note

  1. Confirmed fixed factual information: 4625B61G01 is Emerson Westinghouse Common Q series safety redundant logic coprocessor board, matched with main CPU 4620B91G01, dual-core cross-check fault-tolerant design, single-module hot swappable, conforms to Nuclear Class 1E safety standard, powered by 4535V60A35 power module (data source: industrial nuclear DCS spare parts supplier unified catalog)

  2. Standardized derived content: Title, product introduction, full parameter specifications and application scope follow unified international writing standards for Common Q nuclear DCS control boards; refer to Emerson official Common Q system operation manual for factory original precise datasheet parameters if required.


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