Description

🔧Key Functions&Role in the System

The DS200DCFBG1BNC plays a critical role in generator excitation control and reliability:

Monitors DC Field Power Supply:

Tracks voltage and current from the exciter(which supplies DC to the generator rotor).

Ensures stable field current for proper generator voltage and reactive power control.

Battery Backup Interface:

Connects to DC battery banks that provide backup power to the excitation system during AC power loss.

Enables black-start capability or smooth transition during grid disturbances.

Fault Detection&Diagnostics:

Detects under-voltage,over-voltage,charger failure,or battery degradation.

Sends alarm/status signals to the Mark VIe controller(via RTB or TBC interface).

Redundancy Management:

Works in redundant pairs(A&B channels)to ensure high availability.

Supports hot-swap replacement.

Communication with Controller:

Interfaces with the TBC(Turbine Board Controller)or RTB(Remote Terminal Board)via backplane.

Provides real-time data to the HMI(Sohio or Proficy)for operator visibility.

📌Technical Highlights

Parameter Specification

System GE Mark VI/Mark VIe Turbine Control

Voltage Monitoring 125 VDC or 250 VDC systems

Signal Types Analog(voltage/current),Digital(status,alarms)

Connectors Spring clamp or screw terminals(not actual BNC)

Backplane Interface VMEbus or Ethernet-based(depending on tray)

Redundant Yes–typically used in dual-tray configurations

Hot-Swappable Yes

Diagnostics LED indicators for power,comms,fault

Firmware Configurable via TCT(Turbine Configuration Tool)or Mark VIe Console

🏭Typical Applications

Gas Turbines:LM2500,6FA,7EA,9FA

Steam Turbines:In combined-cycle power plants

Power Plants:Simple cycle,combined cycle,cogeneration

Oil&Gas:Offshore platforms,LNG plants,compressor stations

Black Start Units:Where battery-backed excitation is critical

🔗Related Components in Mark VI/VIe System

Part Number Function

DS200TBCxGx Turbine Board Controller(main CPU)

DS200REGxGx Regulator Board(excitation control)

DS200PSDxGx Power Supply Board

DS200RTBxGx Remote Terminal Board(I/O interface)

DS200DCCxGx DC Charger Control Board

TCT Software Configuration&diagnostics tool

Sohio/Proficy HMI Operator interface

🛠️Installation&Maintenance Tips

Handle with ESD Protection:Always use a grounded wrist strap.

Verify Redundancy:Before removing,ensure the other channel is healthy.

Check Firmware Version:Match firmware across redundant boards.

Monitor Alarms:Use TCT or HMI to check for”DC Field Loss”,”Charger Fail”,or”Battery Weak”.

Terminal Torque:Ensure proper tightening of screw terminals(typically 0.5–0.6 Nm).

Label Wiring:Before removal,label all field connections.

❗Obsolescence&Availability

The DS200 series is part of the Mark VI system,which is being phased out in favor of Mark VIe(Ethernet-based)and Mark VII.

However,DS200DCFBG1BNC is still in active use in many plants.

Available through:

GE Digital Field Service

Certified Third-Party Suppliers

Refurbished/Remanufactured Units(with warranty)

✅Product Guarantee(For Suppliers)

When sourcing DS200DCFBG1BNC:

Test for power-on functionality

Verify I/O signal integrity

Clean and inspect for corrosion

Provide 12–24 month warranty

Include test report and burn-in data

Offer technical support for integration

📎Need More?

If you need any of the following,I can help:

✅Datasheet or manual PDF

✅Pinout or wiring diagram

✅Replacement or upgrade path(e.g.,to Mark VIe)

✅Troubleshooting guide(e.g.,”Field Loss”alarm)

✅How to test with TCT software

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