IS210DTURH1AA | Mark VIe Turbine Speed Module | OEM New

Description

Product Introduction

The GE IS210DTURH1AA is a VMEbus turbine speed monitoring module from the Mark VIe Speedtronic series, purpose-built for critical speed measurement and overspeed protection in gas and steam turbine applications. This board interfaces with magnetic pickups (variable reluctance) or proximity probes to measure turbine shaft speed, acceleration, and overspeed conditions—the most critical protection function in any turbine control system. The “AA” suffix indicates a conformal coated board with enhanced moisture and contaminant resistance for harsh environments, combined with the H1A revision features.

What sets the DTURH1AA revision apart is its triple-redundant speed measurement architecture, dedicated overspeed trip logic, 1 ms response time for trip execution, and the acrylic conformal coating that protects critical analog and digital circuitry from humidity, salt spray, and airborne particulates. The board features three independent speed input channels with automatic sensor fault detection, voting logic for fault-tolerant speed measurement, and a dedicated hardware-based overspeed trip that operates independently of software. For system integrators requiring the highest integrity speed monitoring and overspeed protection with environmental protection in demanding installations, this board is the direct OEM solution.

Key Technical Specifications

Key Selling Points & Differentiators

• Conformal Coated for Harsh Environments: The “AA” suffix provides acrylic coating that protects critical analog and digital circuitry against humidity, salt spray, and airborne contaminants—ideal for offshore platforms, coastal plants, and high-humidity installations.
• Triple-Redundant Architecture: Three independent speed input channels with voting logic—ensures uninterrupted speed measurement even with a single sensor failure.
• Hardware Overspeed Trip: Dedicated hardware-based trip output that operates independently of software and the main processor—provides the highest level of integrity for overspeed protection.
• Fast Response: <1 ms from detection to trip output—critical for overspeed events where every millisecond counts.
• Comprehensive Sensor Diagnostics: Open-circuit, short-circuit, low signal, and no-signal detection on each channel—enables predictive maintenance and prevents false trips.
• Multiple Sensor Support: Magnetic pickups (variable reluctance) and proximity probes—software configurable per channel.
• Live Test Verified: Every board undergoes a 48-hour burn-in with all 3 channels exercised across the full frequency range. We log speed accuracy, trip response time, voting logic behavior, and diagnostic detection thresholds. Coated boards are visually inspected for complete coverage and absence of bubbles.
• 90-Day Warranty: Covers functional defects. If it fails under normal operating conditions, we replace it. No restocking fee for verified returns.
• OEM Traceability: All units come from audited surplus channels with original GE anti-static bags and serialized labels. No clones, no pull-and-refurbish from unknown sources.
• Configuration Backup Service (Free): Upon request, we extract and archive your existing board’s firmware version, speed setpoints, and configuration before shipment.

Frequently Asked Questions (FAQ)

Q: What does the “AA” suffix mean on IS210DTURH1AA?

A: The “AA” indicates conformal coating combined with the H1A revision. Specifically, it means the board has an acrylic conformal coating (0.02–0.05 mm) applied to the entire PCB assembly for moisture and contaminant protection, along with all H1A features (triple-redundant speed inputs, hardware overspeed trip, 1 ms response). Electrically and functionally they are identical in terms of speed monitoring and trip functionality. The coating adds protection; the H1A features provide critical speed monitoring and overspeed protection.

Q: What is the difference between IS210DTURH1AA and IS200VTURH1A?

A: Both boards provide triple-redundant speed monitoring with similar specifications. The DTURH1AA provides conformal coating and is optimized for newer Mark VIe systems. Verify with your existing system before replacing. In most cases, they are interchangeable.

Q: What is the difference between IS210DTURH1A and IS210DTURH1AA?

A: The H1A is non-coated; the H1AA has conformal coating. The coating protects against humidity, salt fog, and chemical vapors. If your cabinet is in a coastal area, offshore platform, or high-humidity environment, the AA variant is strongly recommended. In a clean, climate-controlled room, the H1A is sufficient and costs less. If your existing board is coated, you must replace it with a coated board (AA) because the uncoated version will fail faster in that environment.

Q: What types of speed sensors does this board support?

A: The DTURH1AA supports two sensor types:

• Magnetic pickup (variable reluctance): Generates a sine wave proportional to speed. Requires no external excitation. Input range 50 mV to 100 V peak.
• Proximity probe: Requires external signal conditioner (typically 24 VDC, provides a voltage output proportional to speed). Input range 0–24 V.

Each channel is software configurable for sensor type and sensitivity.

Q: What is the voting logic and why is it important?

A: The DTURH1AA uses 2oo3 voting logic—the board compares the three speed readings and requires at least two of three channels to agree on the speed value. This prevents a single failed sensor from causing a false trip or missing a genuine overspeed event. You can also configure 1oo3 voting (any single channel triggers a trip) for applications where sensor redundancy is not required. We recommend 2oo3 for most turbine applications.

Q: Why is the hardware overspeed trip important?

A: The hardware overspeed trip operates entirely outside of the software and main processor. Even if the VPRO processor crashes or the software locks up, the DTUR’s dedicated hardware will detect an overspeed condition and assert the trip output within 1 ms. This is a fundamental safety requirement for turbine control systems—you cannot rely on software alone for overspeed protection.

Q: Is this board hot-swappable?

A: No. The Mark VIe VME backplane does not support live insertion. You must de-energize the rack, ground yourself, and wait 30 seconds for bulk capacitors to discharge. The DTUR handles critical protection I/O—pulling it while powered could cause inadvertent trips or damage to sensors. Don’t risk it.

Q: What is the typical lead time for this part?

A: We stock these on the shelf—usually ship within 24 hours. For international orders, add 3–5 days for customs.

Q: Does this board work with the newer Mark VIeS (SIL-rated) cabinets?

A: To be direct: no. The IS210DTURH1AA is not SIL-certified. It’s meant for standard Mark VIe industrial control. The SIL-rated systems use the IS220DTUR (with additional redundancy, diagnostic coverage, and separate safety shutdown path). Mixing them violates your site’s safety integrity level. If you’re in a SIL environment, we can source the correct variant but it will have a different model number.

Q: What’s your return policy if this doesn’t solve my speed monitoring or overspeed protection issue?

A: If the board is electrically functional but doesn’t correct your fault, accept a return within 30 days provided no physical damage. We charge a 15% restocking fee if the fault was due to sensor wiring issues or configuration errors. We’ll diagnose with you before shipping.

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