GE DS200RTBAG2AFB RTBA Relay Terminal Output Board For Mark V Speedtronic Turbine Control System

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    • Product Code: DS200RTBAG2AFB
    • Availability: In Stock
    GE DS200RTBAG2AFB RTBA Relay Terminal Output Board For Mark V Speedtronic Turbine Control System
    Manufacturer: GE Vernova (General Electric Turbine Controls)
    Model: DS200RTBAG2AFB (RTBA Relay Terminal Board, G2 Revision)
    Matching System: GE Mark V Speedtronic Gas / Steam Turbine Control System; Matches DS200DSPCH1ADA DSPC DSP Main Board
    Type: Cabinet-mounted relay expansion board, 10 pluggable industrial relays, dual connector interface (16pin + 2pin)
    Core Function: Expand discrete dry contact output capacity for turbine control; drive auxiliary motors, alarm horns/strobes, auxiliary valve interlock circuits, remote status transfer signals; relay coils controlled by Mark V LAN I/O or remote logic; MOV surge protection for all contact loops, easy replaceable individual relays
    1. Product Overview
    DS200RTBAG2AFB is a dedicated relay expansion terminal board (RTBA) of GE Mark V DS200 series control hardware, used to expand the limited relay output channels of the DSPC main control board. It is installed inside the turbine control cabinet, powered by 24VDC cabinet auxiliary power, and receives control commands from the Mark V main system via two internal connectors (16-pin signal harness + 2-pin power supply). The board integrates 10 independent pluggable relays divided into two specifications: 1. K20–K26 (7pcs): DPDT double-pole double-throw Form-C contacts, 10A @ 250VAC resistive load 2. K27–K29 (3pcs): 4PDT four-pole double-throw Form-C contacts, 1A contact rating All relay coils are 110VDC rated, each contact circuit is equipped with 130VAC MOV metal oxide varistor surge suppression to absorb switching surge and protect field wiring loops. Each relay is modular and hot-replaceable without removing the whole board; screw terminal blocks on the front panel directly connect field auxiliary equipment wiring. It is widely deployed in combined-cycle gas turbine, steam turbine and petrochemical cogeneration unit Mark V control racks for auxiliary equipment logic control and alarm signal output. GE discontinued production, only refurbished and surplus new spare parts available aftermarket.
    2. Complete Technical Specifications
    • Full Part Number: DS200RTBAG2AFB, RTBA G2 series variant
    • Total Relay Quantity: 10 pluggable relays (7×DPDT + 3×4PDT)
    • Relay Coil Voltage: 110VDC operating coil
    • DPDT Relay (K20-K26): Dual Form-C contacts, 10A / 250VAC resistive load
    • 4PDT Relay (K27-K29): Four Form-C contacts, 1A / 250VAC resistive load
    • Surge Protection: 130VAC MOV varistor on every contact loop
    • Cabinet Supply Voltage: 24VDC auxiliary control power for board logic
    • Internal Connectors: 16-pin signal control connector + 2-pin power connector to Mark V backplane
    • Field Interface: Front panel screw terminal blocks for field device wiring
    • Relay Maintenance: Single relay individual removable & replaceable
    • Operating Temperature: 0℃ ~ +60℃ ventilated turbine cabinet (non-condensing)
    • Storage Temperature: -40℃ ~ +85℃
    • Humidity: 5% ~ 95% RH non-condensing
    • Mechanical Mount: Cabinet panel standoff mounting bracket
    • Weight: ~0.75kg
    • Certification: GE turbine control standard GEI-100167, CE industrial compliance
    3. Hardware Structure Composition
    1. 10 modular plug-in relay sockets (K20~K29) with built-in status indicator LEDs inside each relay
    2. Front row screw terminal array: COM/NO/NC field wiring terminals for all relay contact circuits
    3. MOV surge suppression circuit array for each contact output loop
    4. Rear dual connectors: 16pin signal harness port + 2pin 24VDC power input to Mark V main rack
    5. PCB power distribution & relay drive logic circuit, 24VDC internal power regulation
    4. Core Turbine Application Scenarios
    • Combined-cycle power plant gas turbine Mark V rack: auxiliary fan, lube oil pump, drain valve on/off control
    • Steam turbine control cabinet: fault alarm horn, fault strobe light, remote interlock signal transmission
    • Petrochemical cogeneration gas turbine unit: auxiliary isolation valve auxiliary contact expansion output
    • Generator excitation system & medium voltage drive logic auxiliary relay expansion board
    GE Vernova © DS200RTBAG2AFB RTBA Relay Terminal Expansion Board Mark V Speedtronic


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