IS200TVBAH2ABC - Vibration Terminal Board

SPECIFICATIONS:

Part Number: IS200TVBAH2ABC
Manufacturer: General Electric
Series: Mark VI
Product Type: Vibration Terminal Board
Number of channels supporting vibration probes: 8
Number of channels with selectable pull: 8
Number of channels with PRxxL: 8
MPU pulse rate range: 2 Hz to 20 kHz
Voltage Range: 18 - 32 VDC
Number of buffered outputs: 14
Mounting: DIN-rail mounting
Amplitude accuracy: ± 0.1%
Technology: Surface mount
Number of N24 outputs: 14
N24 maximum current: 12 mA
Operating temperature: -30 to 65°C
N28 voltage: 28 normal
N28 maximum current: 400 mA
Size: 33.0 cm high x 17.8 cm
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D

FUNCTIONAL DESCRIPTION:

IS200TVBAH2ABC is a Vibration Terminal Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. The Vibration Terminal Board (TVBA) serves as the signal interface for the Mark VI I/O pack PVIB. In the Mark VI system, the equivalent board is the VVIB, which works with the TVIB terminal board. The TVBA is designed to interface directly with seismic (velocity), Proximitors, Velomitors, and accelerometer-type probes. It provides signal suppression and electromagnetic interference (EMI) protection for each input, along with pull-up biasing for open circuit detection.

Input signals are routed to the Mark VI I/O packs via a standard 37-pin connector. The TVBA supports both simplex and Triple Modular Redundant (TMR) configurations, with TMR applications distributing the signals to three separate I/O packs. For expanded connectivity, the TVBA includes buffered outputs through additional 9-pin and 25-pin connectors, enabling integration with the Bently Nevada 3500 monitoring system. Each channel also features a bayonet nut connector (BNC) to support third-party monitoring devices.

Unlike earlier systems, the Mark VIe does not rely on the traditional RKPS power supply. Instead, it uses +28V sourced power. Since there is no external -28V source, the TVBA includes three removable WNPS (negative power supply) daughterboards to generate the required -28V, ensuring compatibility with the functions of the earlier Mark VI TVIB.

INSTALLATION:

The TVBA supports 14 sensor inputs, which are connected directly to two I/O terminal blocks. Each terminal block is secured with two screws and contains 24 terminals, accommodating wire sizes up to #12 AWG. Adjacent to each terminal block is a designated point for shield termination.

INPUT CHANNELS 1 THROUGH 8:

• Compatible with Proximitors, Seismic sensors, Velomitors, and Accelerometers (limited to channels 1, 2, and 3).
• Each channel includes a current-limited 24V power supply.
• Jumper JPxA enables open circuit detection and provides a 3mA constant current for Velomitor support.
• Jumper JPxB sets the JA1 and JB1 outputs for integration with the Bently Nevada 3500 rack.
• Jumper JPxC allows PR0xL to be configured as either an open (true differential input) or connected to PCOM for a -24V return path.

INPUT CHANNELS 9 THROUGH 12:

• Designed Exclusively for Proximitor Sensors: These input channels are specifically intended to interface with Proximitor-type sensors, ensuring accurate vibration and position monitoring in turbine and rotating machinery applications.
• Dedicated -24V Power Supply with Current Limiting: Each channel is equipped with a built-in, current-limited -24V power source, providing safe and reliable power delivery tailored to the operational requirements of Proximitor sensors. The current limiting feature helps protect the sensors and system against overcurrent conditions.
• Fixed Configuration – No Jumper Settings Required: These channels are pre-configured at the hardware level for Proximitor operation, eliminating the need for jumper adjustments. This simplifies installation and reduces the risk of configuration errors during setup or maintenance.

-28V POWER SUPPLY BOARD, WNPS:

• Voltage Conversion from +28V to -28V for Sensor Powering: Each WNPS (Negative Power Supply) module is responsible for converting the +28V DC input—supplied by the PVIB I/O pack—into a stable -28V output. This negative voltage is essential for supporting the current-limited 24V outputs used to power Proximitor sensors and other compatible vibration monitoring devices.

• One WNPS Module Per PVIB I/O Pack: To ensure consistent and isolated power conversion, each PVIB I/O pack is paired with its own dedicated WNPS module. This 1:1 configuration enhances reliability and simplifies troubleshooting and replacement if needed.

• Independent +28V Inputs with Shared -28V Bus Architecture: While each WNPS receives an independent +28V input, the -28V outputs are connected to a common bus shared across all three WNPS modules in a TMR (Triple Modular Redundant) setup. This design ensures redundancy and consistent power availability across all channels, even in high-reliability applications.

WOC has the largest stock of OEM Replacement Parts for GE Speedtronic Gas Turbine Control Systems. We can also repair your faulty boards and supply unused and rebuilt boards backed up with a warranty. Our team of experts is available around the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs, kindly contact our team by phone or email.

FREQUENTLY ASKED QUESTIONS:

How is power supplied to the TVBA?

Mark VIe systems do not use the traditional RKPS power supplies. Instead, the TVBA is powered by a +28V source from the PVIB. It uses WNPS daughterboards to generate the required 28V for sensor operation.

What is a WNPS module, and how many are needed?

A WNPS (Negative Power Supply) module converts +28V to -28V for current-limited -24V sensor outputs. One WNPS is required per PVIB I/O pack, with a shared 28V bus across three modules in TMR setups.

Are there outputs available for external monitoring systems?

Yes. The TVBA features buffered outputs via 9-pin and 25-pin connectors for integration with Bently Nevada 3500 systems. Additionally, each channel includes a BNC connector for third-party monitoring equipment.