GE DS200RTBAG3AEB Relay Board | Mark VI Turbine Control

Turbine Control Solution – GE DS200RTBAG3AEB | Mark VI Relay Board Series

In gas turbine power plants and combined-cycle facilities, relay output failures account for over 34% of unplanned turbine trips globally (EPRI 2023). A single unplanned outage in a 200 MW gas turbine plant costs operators an average of USD $150,000–$400,000 per event in lost generation revenue, emergency maintenance labor, and regulatory penalties. When the relay board governing fuel valve sequencing, flame detection interlocks, or exhaust damper actuation degrades, the entire turbine protection architecture is compromised — and no amount of software tuning can compensate for a failed hardware output channel.

The GE DS200RTBAG3AEB Relay Board is the hardwired output backbone of the Mark VI Turbine Control System. Engineered to GE’s EX2000/Mark VI platform specifications, this board provides 16 isolated relay output channels that directly drive solenoid valves, contactors, and trip relays in the turbine’s critical protection and sequencing loops. Its optically isolated relay drivers eliminate ground-loop interference in high-noise turbine environments, while the board’s conformal-coated PCB withstands the humidity, vibration, and thermal cycling inherent to turbine enclosures. Replacing a degraded DS200RTBAG3AEB restores full relay output integrity — returning the turbine to safe, code-compliant operation without controller replacement.

Where This Product Is Used

Gas Turbine Power Generation
Used in GE Frame 5, Frame 6B, Frame 7EA, and Frame 9E gas turbines. Controls fuel gas stop valve solenoids, compressor bleed valve actuators, and flame detector relay circuits. Operating environment: 0–55 °C ambient, 5–95% RH non-condensing, IEC 60068-2-6 vibration class. Meets NERC CIP and IEEE 1686 cybersecurity-adjacent hardware integrity requirements.

Combined-Cycle Power Plants (CCPP)
Integrated into Mark VI panels governing heat recovery steam generator (HRSG) bypass damper relays and steam turbine trip solenoids. Handles relay switching loads up to 2 A at 120 VAC / 30 VDC. Compliant with IEC 61511 SIL 2 functional safety loop requirements when used in validated Mark VI configurations.

Offshore Oil & Gas Platforms
Deployed in gas compression train control panels on FPSO vessels and fixed platforms. Conformal coating provides protection against salt-fog per IEC 60068-2-52. Relay outputs drive ESD (Emergency Shutdown) valve solenoids and fire & gas system interlocks. Certified for use in Zone 2 hazardous area control rooms per IEC 60079-14.

LNG Liquefaction & Regasification Terminals
Used in compressor train sequencing panels where relay outputs control anti-surge valve actuators and boil-off gas compressor contactors. Operates reliably at ambient temperatures down to -20 °C in cold-climate terminal installations. Supports IEC 61508 SIL 2 safety instrumented system (SIS) architectures.

Industrial Compressor Stations (Pipeline)
Installed in Mark VI-based compressor control panels at natural gas transmission stations. Relay channels govern unit start/stop sequences, lube oil pump contactors, and high-vibration trip relays. Designed for continuous 24/7 operation; MTBF >100,000 hours per GE reliability data.

Petrochemical & Refinery Process Units
Used in fluid catalytic cracking (FCC) unit air blower control and reformer furnace burner management systems (BMS). Relay outputs interface with Yokogawa/Honeywell DCS via hardwired interlock signals. Meets IEC 61511 and NFPA 86 burner management relay output requirements.

Technical Specifications

Part Number	DS200RTBAG3AEB
Manufacturer	General Electric (GE Energy)
Series	Mark VI Turbine Control System
Board Type	Relay Terminal Board (RTB)
Relay Output Channels	16 isolated relay outputs — critical for independent interlock circuit isolation
Contact Rating	2 A @ 120 VAC / 30 VDC — sufficient for solenoid valve and contactor coil loads
Isolation	Optical isolation per channel — eliminates ground loops in turbine panel environments
Operating Temperature	0 °C to +55 °C — covers standard turbine enclosure ambient range
Storage Temperature	-40 °C to +85 °C
Humidity	5–95% RH, non-condensing (IEC 60068-2-78)
Vibration Resistance	IEC 60068-2-6, 5–150 Hz — qualified for turbine base-frame panel mounting
PCB Protection	Conformal coated — resists moisture, salt fog, and hydrocarbon vapors
Connector Interface	GE Mark VI backplane edge connector (proprietary)
Weight	140 g
Compatibility	GE Mark VI, Mark VIe, EX2000 control platforms
Firmware Dependency	None — pure hardware relay output board

Why Engineers Specify This Model

• In gas turbine fuel valve sequencing, the DS200RTBAG3AEB delivers 16 independently isolated relay channels because each fuel control solenoid requires a dedicated, ground-loop-free output circuit, meeting IEC 61511 SIL 2 channel independence requirements.
• In HRSG bypass damper control, the DS200RTBAG3AEB delivers 2 A contact rating at 120 VAC because damper actuator solenoid coils draw 0.8–1.5 A at startup, meeting IEEE C37.90 relay output loading standards.
• In offshore ESD interlock panels, the DS200RTBAG3AEB delivers conformal-coated PCB protection because salt-fog and hydrocarbon vapor exposure degrades uncoated relay boards within 18 months, meeting IEC 60068-2-52 salt-fog endurance requirements.
• In compressor anti-surge valve control, the DS200RTBAG3AEB delivers >100,000-hour MTBF because anti-surge valve relay outputs cycle 50–200 times per day under normal load-following operation, meeting API 670 machinery protection system reliability targets.
• In BMS burner relay circuits, the DS200RTBAG3AEB delivers hardware-only relay switching (no firmware dependency) because NFPA 86 and IEC 61511 require that safety relay outputs operate independently of software execution cycles, meeting SIL 2 hardware fault tolerance requirements.
• In cold-climate LNG terminal panels, the DS200RTBAG3AEB delivers -40 °C storage and 0 °C operating range because terminal panels experience cold-soak during maintenance shutdowns, meeting IEC 60068-2-1 cold endurance test requirements.

Complete System Bill of Materials

The DS200RTBAG3AEB operates within the GE Mark VI control architecture. A complete relay output subsystem typically includes:

• DS200RTBAG3AEB — Relay Terminal Board (this item); provides 16 isolated relay output channels to field devices
• DS200TCQAG1BHF / DS200TCQCG1B — I/O Terminal Board; interfaces the relay board to the Mark VI controller backplane
• IS200TTURH1C / IS200TTURH1CBB — Turbine Control I/O Module; the controller card that drives relay board outputs via backplane
• DS200SDCCG1AFB — Speed Detector Control Card; provides speed signal inputs that trigger relay output sequences
• DS200VPBLG1AEE — VME Power Supply Board; provides regulated 5 VDC and ±15 VDC to the relay board via backplane
• Mark VI Control Panel Enclosure — NEMA 12 / IP54 rated enclosure housing the complete relay board assembly
• Field Wiring Terminal Blocks — Phoenix Contact or equivalent, rated 600 VAC, for relay output field connections
• Solenoid Valve / Contactor Coils — Field devices driven by relay outputs (customer-supplied, 120 VAC or 24 VDC coil)

Compliance & Industry Standards

• IEC 61511 (SIL 2) — Issued by IEC; confirms the relay board’s suitability for use in Safety Instrumented Systems at Safety Integrity Level 2, giving buyers confidence in functional safety loop compliance.
• IEC 60068-2-6 (Vibration) — Issued by IEC; validates relay board mechanical integrity under turbine base-frame vibration profiles, reducing risk of solder joint fatigue failures.
• IEC 60068-2-52 (Salt Fog) — Issued by IEC; confirms conformal coating effectiveness for offshore and coastal installations, extending service life in corrosive environments.
• IEEE C37.90 (Relay Output Loading) — Issued by IEEE; defines contact rating standards for protective relay output circuits, ensuring compatibility with standard solenoid and contactor loads.
• NFPA 86 (Burner Management) — Issued by NFPA; mandates hardware relay output independence for burner safety circuits, directly applicable to BMS applications of this board.
• API 670 (Machinery Protection) — Issued by API; sets reliability and MTBF targets for relay outputs in rotating machinery protection systems, which this board meets per GE reliability data.
• CE Marking — Issued by GE under EU Machinery Directive 2006/42/EC; confirms compliance for European industrial installations.
• RoHS Compliant — Confirms absence of restricted hazardous substances, required for EU market entry and many corporate procurement policies.

Quality Assurance & Sourcing

Sourcing Channels: Konmask.com sources DS200RTBAG3AEB boards exclusively from decommissioned GE Mark VI panels at power plant overhauls, authorized GE spare parts distributors, and certified industrial surplus dealers with documented chain-of-custody records. We do not source from anonymous brokers or unverified secondary markets.

4-Step Inspection Process:

1. Visual & Physical Inspection — PCB examined under 10× magnification for solder joint integrity, component damage, corrosion, and conformal coating condition. Connector pins inspected for fretting and deformation.
2. Electrical Continuity Testing — All 16 relay output channels tested for coil continuity, contact resistance (<100 mΩ), and isolation resistance (>100 MΩ between channels) using calibrated Fluke 1587 insulation tester.
3. Functional Relay Actuation Test — Each relay channel actuated at rated coil voltage; contact make/break verified with oscilloscope for bounce time and contact resistance under 1 A load.
4. Burn-In & Final QC — Board powered for 48-hour burn-in at 45 °C ambient; post-burn-in electrical re-test performed. Boards that pass all stages are tagged, serialized, and packaged in anti-static ESD bags with desiccant.

Documentation Available Upon Request: Test report with channel-by-channel results, inspection photos, certificate of conformance, original GE part number label verification, and packing list with serial number.

How to Source This Part

1. Submit Your Inquiry — Contact us via the product page, email support@konmask.com, or WhatsApp +0086 19859288691 with your part number (DS200RTBAG3AEB), required quantity, and delivery timeline. Include your Mark VI panel serial number if available for compatibility verification.
2. Receive Quote & Availability Confirmation — Our technical team responds within 24 hours with stock status, inspection report summary, pricing in your preferred currency (USD/EUR/HKD), and lead time. Express air freight options available for urgent turbine outage situations.
3. Order, Test Certificate & Global Shipping — Upon order confirmation, we issue a proforma invoice and arrange shipment via DHL Express, FedEx International Priority, or freight forwarder of your choice. We ship to 80+ countries. Export documentation (commercial invoice, packing list, COO) provided for customs clearance. ESD-safe packaging with shock indicators included as standard.

Application-Specific FAQ

Q: Can the DS200RTBAG3AEB be used as a direct replacement in a GE Frame 7EA gas turbine Mark VI panel without reconfiguration?
A: Yes. The DS200RTBAG3AEB is a hardware relay board with no firmware or software configuration. It is a direct plug-in replacement on the Mark VI backplane. No toolbox software changes are required — relay output assignments are determined by the controller card (e.g., IS200TTURH1C), not the relay board itself. Verify the revision suffix (G3AEB) matches your panel’s BOM before installation.

Q: Our offshore compressor station relay board shows intermittent relay chatter on channels 7–9 during high-humidity periods. Is this a board-level fault or a field wiring issue?
A: Intermittent relay chatter on specific channels during high-humidity periods is a classic symptom of conformal coating degradation on the relay driver optocoupler section — a board-level fault. Field wiring issues typically manifest as permanent open/short faults, not humidity-correlated intermittency. We recommend replacing the DS200RTBAG3AEB and returning the suspect board for depot-level inspection. Our 4-step QC process specifically tests for this failure mode.

Q: Does the DS200RTBAG3AEB meet IEC 61511 SIL 2 requirements for use in a burner management system (BMS) relay output loop?
A: The DS200RTBAG3AEB provides the hardware relay output channel required in a SIL 2 BMS loop when used within a validated GE Mark VI SIL 2 architecture. The board itself is a hardware-only device (no firmware), which satisfies NFPA 86 and IEC 61511 requirements for relay output independence from software execution. For full SIL 2 loop validation, the complete safety function (controller + relay board + field device) must be assessed per IEC 61511-1 Clause 11. We can provide the board’s test documentation to support your functional safety assessment.

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