GE IS200TREGH1BDB – Mark VI Trip/Emergency Terminal Board for Turbine Protection

The GE IS200TREGH1BDB is a TREx-series terminal board used in GE Speedtronic Mark VI turbine control systems. It handles the field-side connections for the emergency trip circuit and typically routes redundant trip commands to solenoid coils that drive the turbine’s shutdown valves. From my experience, TREG boards are chosen when you need high-integrity shutdown paths with simple, serviceable wiring and predictable behavior under real plant conditions.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than 1 month latest
• Payment: 50% advance; full payment prior to delivery
• Express shipping: FedEx, UPS, DHL
• Pre-shipment checks: visual inspection and I/O port integrity verification

Key Features

• Designed for Mark VI trip circuits – Provides the terminal interface for emergency trip solenoid wiring in TMR architectures.
• TMR-friendly layout – Typically supports three independent trip paths that participate in 2-out-of-3 voting at the system level, improving availability and safety.
• Field-ready barrier terminals – Clear terminal designations and screw connections make panel work faster and neater in many cases.
• Robust DC coil handling – Built with suppression and spacing practices suitable for DC trip solenoids, helping reduce contact wear and transient noise.
• Drop-in form factor – Fits standard Mark VI cabinet layouts; no special brackets typically required.
• Serviceability – Straightforward access to terminals makes routine checks and replacements simpler during planned outages.

Technical Specifications

Brand / Model	GE (General Electric) / IS200TREGH1BDB
Product Category	Mark VI Trip/Emergency Terminal Board (TREx series)
HS Code	853890 (Parts for industrial control/switchgear assemblies)
System Compatibility	GE Speedtronic Mark VI turbine control systems
Power Requirements	Derives logic power from the Mark VI rack; field trip power supplied by site DC source (no separate on-board supply)
Signal I/O Types	Trip solenoid outputs (redundant paths), discrete feedback/monitoring points for trip circuit status
Communication Interfaces	Ribbon/backplane connectors to Mark VI controllers; no external fieldbus ports on the board itself
Installation Method	Panel-mounted terminal board; screw-type barrier terminals for field wiring

Application Fields

The IS200TREGH1BDB is commonly used in:

• Gas and steam turbine emergency trip circuits (power generation units)
• Oil & gas compressor/driver shutdown systems integrated via Mark VI
• Industrial cogeneration and process plant turbine protection panels
• Retrofit projects maintaining existing Mark VI trip logic and wiring practices

One thing I appreciate is how these TREx boards keep field wiring predictable. Technicians often say, “We can trace and prove the trip path in minutes,” which matters during tight outage windows.

Advantages & Value

• Reliability – Suited for TMR trip architectures with clear segregation of channels, reducing common-cause issues.
• Compatibility – Matches Mark VI wiring conventions and cabinet footprints, typically a drop-in replacement for like-for-like models.
• Service continuity – Availability of spares and straightforward terminal access keeps outage time down.
• Procurement confidence – Each unit is inspected before shipment; documentation support available on request.

Installation & Maintenance

• Cabinet environment – Install in a clean, dry control cabinet with adequate ventilation; keep wiring separated for trip circuits and observe bend radius for ribbon cables.
• Wiring – Use properly rated DC wiring for solenoid circuits. Torque terminal screws to spec and verify polarity on each solenoid coil lead.
• Safety – Isolate DC trip power and follow LOTO procedures before working on terminals; verify zero energy with a meter.
• Routine checks – Periodically re-tighten terminals, inspect for discoloration due to DC switching, and confirm continuity of trip paths during maintenance windows.
• Firmware/logic – The terminal board is passive; any functional changes are typically in the Mark VI logic. Keep controller configuration and documentation synchronized.

Quality & Certifications

GE Mark VI hardware is generally built to meet industrial control standards and is commonly deployed in CE-marked and UL-evaluated systems when integrated per the OEM cabinet design. Specific certifications for a given serial/revision can be shared from the device label and OEM documentation upon request.

Related/Supporting Components

You might notice the IS200TREGH1BDB often works alongside other Mark VI protection and I/O hardware, such as:

• TREL / TRES terminal boards – complementary trip channels in TMR systems
• Mark VI controller and protection modules – for executing the 2oo3 trip logic
• DC trip solenoids and shutdown valves – field devices driven through the TREG terminals

Note: Model suffix “H1BDB” refers to a specific hardware revision. For exact interchangeability with your installed base, sharing a photo of the part label and cabinet slot details typically speeds up verification.