GE IS200VTURH1A | VME Speed Module | Fast Shipping

Description

Product Introduction

The GE IS200VTURH1A 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.

What sets the H1A revision apart is its triple-redundant speed measurement architecture, dedicated overspeed trip logic, and 1 ms response time for trip execution. 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—ensuring protection even in the event of processor failure. For system integrators requiring the highest integrity speed monitoring and overspeed protection, this board is the direct OEM solution.

Key Technical Specifications

Key Selling Points & Differentiators

• 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.
• 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 is the difference between IS200VTURH1A and IS200VTURG1B?

A: The VTURH is a dedicated speed monitoring and overspeed protection module with 3 redundant speed inputs and hardware-based trip outputs. The VTURG is a general-purpose I/O scanning board that includes some speed inputs but is not specifically designed for overspeed protection. For critical turbine speed monitoring and overspeed protection, VTURH is the required module.

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

A: The VTURH1A 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. If you’re using non-standard sensors, check the toolkit’s sensor library—it supports most common models from GE, Bently Nevada, and others.

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 VTURH’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: What is the voting logic and why is it important?

A: The VTURH1A 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: How does the VTURH handle a failed speed sensor?

A: The board continuously monitors each speed input for sensor faults, including:

• Open circuit (broken sensor or cable)
• Short circuit (wiring fault)
• Low signal (weak sensor, gap issue)
• No signal (sensor or cable failure)

When a fault is detected, the board flags a diagnostic alarm and excludes that channel from the voting logic—ensuring the turbine continues to operate with the remaining two sensors.

Q: What is the typical speed range for turbine applications?

A: The VTURH1A supports frequencies from 1 Hz to 20 kHz. For a typical 3,600 RPM steam turbine with a 60-tooth gear, this translates to a speed range of 0 to 20,000 RPM. For gas turbines with higher speeds (up to 10,000 RPM) and smaller gear tooth counts, the frequency range is well within the board’s capability. Check your tooth count and maximum speed—the board covers most common turbine applications.

Q: What is the difference between IS200VTURH1A and IS220VTURH?

A: The IS200VTURH1A is for standard Mark VIe systems. The IS220VTURH is for Mark VIeS SIL-rated systems and includes additional diagnostic coverage, redundancy, and SIL-certification. If you’re in a SIL environment, you cannot use the IS200 variant. If you’re in a standard Mark VIe system, the IS220 variant is not required.

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 VTURH handles critical protection I/O—pulling it while powered could cause inadvertent trips or damage to sensors. Don’t risk it.

Q: How do I know if the board is functioning correctly?

A: The VTURH1A performs continuous self-test diagnostics including:

• Speed channel loopback testing
• Sensor fault monitoring
• Voltage rail monitoring
• Trip circuit read-back
• Watchdog timer monitoring

Faults are reported to the Mark VIe Toolkit and can be monitored through the operator interface. We recommend configuring the VTURH’s self-test alarms to trigger maintenance notifications.

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

A: We stock these on the shelf—usually ship within 24 hours of order placement and payment confirmation. For international orders, add 3–5 days for customs. If you need expedited (overnight air), we can do that, but you’ll need to coordinate with our logistics team for the cut-off time.

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 (passes our QC test) but doesn’t correct your fault, we’ll accept a return within 30 days provided the board shows no physical damage and the connectors are intact. We do charge a 15% restocking fee if the fault was due to sensor wiring issues, configuration errors, or toolkit compatibility problems. We’ll work with you over the phone or email to diagnose the problem before we ship—our goal is to get you running, not to ship boxes back and forth.

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