GE DS200DCFBG2BNC (MRP433745) – Product Overview
The GE DS200DCFBG2BNC (Manufacturer Reference Part MRP433745) is a DC Field Bus Termination Board designed for GE’s Speedtronic Mark VIe turbine control systems. It serves as a critical signal interface module within the turbine control cabinet, providing centralized termination, conditioning, and protection for field devices (sensors, actuators) connecting to Mark VIe I/O packs via the DC Field Bus. Its integrated BNC connectors are a key feature for vibration monitoring signals.
Key Parameters & Specifications
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Parameter Category
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Specification
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Model Number
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DS200DCFBG2BNC
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GE Part Number
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MRP433745
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Product Type
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DC Field Bus Termination Board / Field Termination Assembly
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Compatible System
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GE Speedtronic Mark VIe Turbine Control System
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Supported I/O Packs
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IS200/DS200 Series I/O Packs (e.g., IS200DSPX, IS200TVIBH, IS200VAICH etc.)
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Primary Function
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Signal Termination, Conditioning, & Interface for Field Devices to Mark VIe I/O
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Key Connectors
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Screw Terminals (Analog, Discrete, TC, RTD), BNC Connectors (Vibration), DC Field Bus Connectors
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Bus Type Supported
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DC Field Bus
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Signal Types Handled
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Analog (4-20mA, ±10V), Discrete (Dry Contact, Sourcing/Sinking), Thermocouples (J, K, T…), RTDs (Pt100, Pt1000), Vibration (via BNC)
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Bus Termination
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Integrated Termination Resistors (Typically 120Ω for DC Bus)
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Nominal Input Voltage
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Supplied by I/O Pack (Typically 24-30 VDC)
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Mounting
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DIN Rail or Panel Mount within Control Cabinet/Enclosure
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Operating Temp Range
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Industrial Grade (Typically -25°C to +70°C)
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Key Feature Suffix
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BNC (Indicates Integrated BNC Connectors for Vibration Signals)
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Series & Family: Part of the DS200 Series of termination boards and accessories within the broader GE Speedtronic Mark VIe Turbine Management & Control System family.
Key Features:
- Centralized Field Termination: Simplifies wiring and reduces errors for sensors/actuators.
- Signal Conditioning & Isolation: Protects sensitive control electronics from field noise, transients, and ground loops.
- Integrated BNC Connectors: Direct connection for vibration probes (e.g., velocity seismic sensors, proximitors), eliminating need for external adapters.
- DC Field Bus Termination: Ensures signal integrity for communication with I/O packs.
- High-Density Interface: Consolidates connections for numerous field devices.
- Robust Industrial Design: Built to withstand harsh power plant environments (temperature, vibration, EMI).
- Hot-Swappable: Designed for replacement (where system configuration allows) without full system shutdown.
- System Diagnostics: Facilitates troubleshooting via the Mark VIe controller.
Function/Role:
- Acts as the primary physical interface point within the control cabinet for field device wiring.
- Conditions raw sensor signals (scaling, filtering) for accurate input to I/O packs.
- Provides isolation barriers between field devices and the controller.
- Terminates the DC Field Bus network.
- Routes power (where required) from the I/O pack to field devices (e.g., loop power for 4-20mA transmitters).
Purpose/Uses:
- To reliably connect, condition, isolate, and protect signals between critical turbine instrumentation and the Mark VIe control/protection system.
- Specifically used for terminating wires from:
- Temperature Sensors (Thermocouples, RTDs – bearings, exhaust, lube oil).
- Pressure/Flow Transmitters (fuel, oil, hydraulic, air).
- Vibration Probes (Accelerometers, Proximity Probes – via BNC).
- Valve Positioners & Feedback Devices.
- Limit Switches, Solenoid Valves, Alarm Contacts.
- DC Field Bus Cabling between I/O packs.
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