IS200VTURH1B | GE Mark VIe VTURH Board | In Stock

Description

Product Introduction

The GE IS200VTURH1B 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 H1B revision represents a significant upgrade with enhanced diagnostics, improved trip response time, and expanded sensor compatibility.

What sets the H1B revision apart is its triple-redundant speed measurement architecture, dedicated overspeed trip logic, 0.5 ms response time for trip execution (twice as fast as H1A), and enhanced diagnostic coverage including frequency tracking and signal quality monitoring. 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. The H1B also includes improved signal conditioning for better low-speed detection and expanded frequency range. For system integrators requiring the highest integrity speed monitoring and overspeed protection with advanced diagnostics, this board is the direct OEM solution.

Key Technical Specifications

Key Selling Points & Differentiators

• Enhanced Trip Response: <0.5 ms from detection to trip output—twice as fast as H1A, providing an extra margin of safety for overspeed events.
• 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.
• Expanded Frequency Range: 0.5 Hz to 25 kHz—supports very low-speed measurements for startup monitoring and very high-speed applications.
• Improved Low-Speed Detection: 20 mV sensitivity vs. 50 mV on H1A—better detection during startup and low-speed conditions.
• Enhanced Diagnostic Coverage: Signal quality monitoring including frequency tracking and amplitude monitoring for predictive maintenance.
• Expanded Setpoints: 4 setpoints per channel (alert, danger, overspeed, acceleration) vs. 2 on H1A—more granular protection.
• 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 IS200VTURH1B?

A: The H1B has several significant improvements: twice as fast trip response (<0.5 ms vs. <1 ms), expanded frequency range (0.5–25 kHz vs. 1–20 kHz), improved low-speed sensitivity (20 mV vs. 50 mV), expanded setpoints (4 vs. 2 per channel), and enhanced diagnostic coverage including signal quality monitoring. The H1B also requires Mark VIe Toolkit v6.0 or higher vs. v5.0 for H1A. If you need faster response, better low-speed detection, or advanced diagnostics, choose the H1B.

Q: What is the difference between IS200VTURH1B 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 VTURH1B supports two sensor types:

• Magnetic pickup (variable reluctance): Generates a sine wave proportional to speed. Requires no external excitation. Input range 20 mV to 100 V peak (improved low-end sensitivity).
• 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. The improved low-end sensitivity (20 mV vs. 50 mV) provides better detection during startup and low-speed conditions.

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 0.5 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 VTURH1B 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: What is the signal quality monitoring feature?

A: The H1B continuously monitors the frequency and amplitude of each speed signal. If the signal quality degrades—for example, the amplitude drops, the frequency becomes unstable, or noise appears—the board flags a diagnostic warning before it causes a measurement error or false trip. This enables predictive maintenance and prevents unexpected sensor failures.

Q: What are the 4 setpoints per channel?

A: The H1B supports four independent setpoints per speed channel:

• Alert: Early warning for speed approaching danger
• Danger: Pre-trip alarm for speed approaching overspeed
• Overspeed: The primary overspeed trip setpoint
• Acceleration: Rate-of-change trip for rapid acceleration events

This provides more granular protection and allows you to implement a staged alarm and trip strategy.

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

A: The VTURH1B supports frequencies from 0.5 Hz to 25 kHz. For a typical 3,600 RPM steam turbine with a 60-tooth gear, this translates to a speed range of 0 to 25,000 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: 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: 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: Does this board work with the newer Mark VIeS (SIL-rated) cabinets?

A: To be direct: no. The IS200VTURH1B is not SIL-certified. It’s meant for standard Mark VIe industrial control. The SIL-rated systems use the IS220VTURH (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 (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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