GE 369B1843G5009 Generator Set Excitation Control System Module

Special DI Digital Input Module for Excitation System of GE 369B1843G5009 Generator Set
I. Basic Product Identification
Full Model Number: 369B1843G5009
Brand Ownership: GE (General Electric) / GE New China Control
Hardware Category: 32-channel Isolated Digital Input Card (DI Acquisition Module)
Compatible with Control System
GE EX2100 / EX2100e Synchronous Generator Static Excitation Control System (Core Application)
Mark V / Mark VIe Turbine Speed Control + Excitation Integrated Platform
Complementary XDPS, OC6000e Power Plant DCS Distributed Control System
Model Code Interpretation
369B1843 = DI Input Card Hardware Base Series; G5009 is the exclusive suffix: representing customized firmware for excitation system, channel definition, TMR triple redundancy hardware revision, the suffix number must be exactly the same for replacement and cannot be mixed with other G-prefix versions

Core Electrical Hardware Parameters
1. Channel Configuration
Total Channels: 32 Digital Isolated Inputs
Signal Compatibility: Passive Dry Contacts, 24VDC Active Switching Signals (Power Plant Standard)
Rated Input Voltage: 18~30VDC (Nominal 24VDC)
2. Isolation and Safety Design (Standard Configuration for Excitation System in Power Plant Environments)
Single-channel Photoelectric Electrical Isolation, Isolation Voltage: 1500VAC
Triple Redundancy (TMR) Voting Architecture: Three independent acquisition circuits, single-channel failure does not interrupt the excitation logic operation, meeting the SIL2 safety level of power plant
Built-in Surge, Overvoltage, Reverse Connection Protection, capable of withstanding strong electromagnetic interference and grid shock from power plants
3. Power Supply and Power Consumption
Power Supply Source: Unified power supply from system backplane (+5V, ±12VDC)
Overall Power Consumption: ≈8W
Complementary Terminal Base: 369B1873G0021 (32-channel DI dedicated wiring terminal board, must be used in conjunction)
4. Environmental Mechanical Specifications
Operating Temperature: 0℃ ~ +65℃ (Constant temperature condition of power plant control room)
Storage Temperature: -40℃ ~ +85℃
Corrosion Resistance Grade: G3 Industrial Heavy Pollution Corrosion, suitable for hydropower and thermal power environments with damp and dusty conditions
Protection Grade: IP20 (Internal pluggable installation in the cabinet)
Installation Form: Standard 3U Rack Hot Swap Card, can replace spare parts without stopping the machine
Net Weight: 1.3kg

Core Role in Generator Excitation System
As the switch status acquisition unit of the EX2100 excitation control cabinet, it participates in the generator voltage regulation, reactive power regulation, and fault interlock protection logic throughout the process:
Excitation Cabinet Body Status Acquisition
Acquiring the position of the disconnection / connection of the de-magnetization switch, the fault contacts of the excitation rectifier bridge, the status of the excitation circuit, the feedback of the fan cooling operation, the switch signals of the cabinet temperature and humidity
Primary Equipment Feedback Acquisition of Grid-connected Units
Main Circuit Breaker, Isolation Switch Position Contacts, Unit Shutdown / Startup Instructions, Local / Remote Switching Switches, Emergency Stop Button Status
Excitation Protection Interlock Logic Data Source
Uploading all switch status to the excitation main control CPU (DSPX main control board), participating in: Loss of Excitation Protection, Over-Excitation Limitation, Load Shedding Protection, System Trip Interlock Judgment
SOE Event Sequence Recording
Recording the sequence of all switch changes in milliseconds, retrieving the event log after the unit failure, and troubleshooting the reasons for excitation system trip