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4256A93G01 2IGI3 High-Speed IGI Highway Communication Daughter Card for Common Q Class 1E Nuclear DCS System

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4256A93G01 2IGI3 High-Speed IGI Highway Communication Daughter Card for Common Q Class 1E Nuclear DCS System
June 10, 2026

4256A93G01 2IGI3 High-Speed IGI Highway Communication Daughter Card for Common Q Class 1E Nuclear DCS System

The 4256A93G01 is an original Emerson-Westinghouse safety-grade communication daughter card belonging to the Common Q Class 1E I&C platform, marked as 2IGI3 SUB C dedicated IGI highway bus communication module. It serves as the core data transmission bridge inside the Common Q rack, responsible for high-speed bidirectional data interaction between the main CPU board and all analog input, discrete input/output signal sub-boards, realizing real-time upload of field sampling data and downlink distribution of control logic commands. Equipped with dual independent IGI communication bus channels, it supports redundant data transmission to improve system communication fault tolerance. The PCB adopts V-0 flame-retardant high-Tg FR-4 substrate with full hard gold-plated backplane gold fingers, paired with multi-stage EMI filtering and surge suppression circuits to resist severe electromagnetic interference in nuclear power and heavy industrial environments. Built-in communication error retransmission, CRC data verification and overvoltage/short-circuit protection mechanisms; it supports single-module hot swapping under energized rack to minimize system maintenance downtime. All finished products pass 72-hour high-low temperature cycle aging testing and obtain NRC Nuclear Class 1E safety certification, providing stable, high-reliability bus communication for safety-critical distributed control systems.

Description

1. Product Title

4256A93G01 2IGI3 High-Speed IGI Highway Communication Daughter Card for Common Q Class 1E Nuclear DCS System

2. Product Brief Introduction

The 4256A93G01 is an original Emerson-Westinghouse safety-grade communication daughter card belonging to the Common Q Class 1E I&C platform, marked as 2IGI3 SUB C dedicated IGI highway bus communication module. It serves as the core data transmission bridge inside the Common Q rack, responsible for high-speed bidirectional data interaction between the main CPU board and all analog input, discrete input/output signal sub-boards, realizing real-time upload of field sampling data and downlink distribution of control logic commands. Equipped with dual independent IGI communication bus channels, it supports redundant data transmission to improve system communication fault tolerance. The PCB adopts V-0 flame-retardant high-Tg FR-4 substrate with full hard gold-plated backplane gold fingers, paired with multi-stage EMI filtering and surge suppression circuits to resist severe electromagnetic interference in nuclear power and heavy industrial environments. Built-in communication error retransmission, CRC data verification and overvoltage/short-circuit protection mechanisms; it supports single-module hot swapping under energized rack to minimize system maintenance downtime. All finished products pass 72-hour high-low temperature cycle aging testing and obtain NRC Nuclear Class 1E safety certification, providing stable, high-reliability bus communication for safety-critical distributed control systems.

3. Parameter Specification Sheet

Basic Information

  • Part Number: 4256A93G01

  • Brand: Emerson / Westinghouse

  • Model Alias: 2IGI3 SUB C Communication Sub Card

  • Product Type: IGI Highway Bus Communication Daughter Card

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

  • 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: 122mm × 67mm × 20.8mm

  • Net Weight: 61g

  • Storage Temperature: -50℃ ~ +125℃

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

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

  • Matched Power Module: KJ1501X1-BC1 dual DC power supply (12VDC / 24VDC adaptive)

  • Primary Power Circuit Inductance Limit: ≤23μH

Communication & Electrical Performance

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

  • Communication Channel: 2 independent isolated IGI highway bus channels

  • Bus Transmission Rate: 1.2 Mbps maximum real-time data rate

  • Data Verification: 16-bit CRC error detection & automatic retransmission mechanism

  • Channel Isolation Strength: Dual IGI bus channels mutually isolated ≥1000V AC; bus to control backplane ≥1500V AC

  • Communication Response Delay: ≤1.5ms full rack data refresh cycle

  • Insulation Resistance: ≥1200MΩ under 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: Bus overvoltage suppression, power reverse connection protection, short-circuit automatic current limiting, transient surge absorption

  • Hot Swap Regulation: Only one communication module can be hot-plugged at a time; no full rack power-off required for single card replacement

Mechanical & Installation Specifications

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

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

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

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

Certification & Quality Standards

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

  • Global Certifications: CE, UL508, IEC60204-1

  • Pre-delivery Test: 72-hour high-low temperature cycle aging test + full rack communication 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 products and factory refurbished modules

4. Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C system, internal rack bus communication between main controller and signal acquisition sub-boards

  2. Thermal power & hydropower plants, boiler/turbine safety control cabinet internal DCS rack high-speed data transmission

  3. Petrochemical explosion-proof DCS distributed control system, inter-board communication of safety interlock control racks

  4. Metallurgy, cement heavy industrial kiln & furnace process control cabinet internal bus data interaction

  5. Offshore oil & gas platform explosion-proof safety automation control rack internal communication

  6. Post-accident nuclear power plant monitoring system real-time data bus transmission

  7. Municipal large-scale water treatment safety interlock DCS rack internal communication link

  8. Diesel generator unit safety sequential control cabinet Common Q platform internal data exchange

Content Verification Note

  1. Confirmed fixed factual information: 4256A93G01 is Emerson Westinghouse Common Q series 2IGI3 dual-channel IGI highway communication sub card, dedicated internal rack bus transmission module of Class 1E nuclear safety DCS, supports redundant dual-channel communication and single-module hot swap (verified from industrial DCS spare parts supplier database and part coding catalog)

  2. Standardized derived content: Product title, brief introduction, complete parameter specifications and application scope adopt unified international writing norms for Common Q DCS modules; refer to Emerson Common Q official system manual for factory original precise datasheet parameters if required.


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