IS230TNVBH1A - Vibration Input Assembly

SPECIFICATIONS

Part No.: IS230TNVBH1A
Manufacturer: General Electric
Product Type: Vibration Input Assembly
Series: Mark VIe
Mounting option: DIN-Rail mounting
Manual: GEH-6721
Availability: In Stock
Country of Manufacture: United States (USA)

Functional Description

IS230TNVBH1A is an Vibration Input Assembly developed by GE. It is a part of Mark VIe control system. The primary function of the module is to provide vibration monitoring capabilities in systems that require a high level of reliability, such as those employing Triple Modular Redundancy (TMR) architecture. TMR is a fault-tolerant system design that utilizes three identical components, allowing for redundant monitoring and control. This redundancy ensures that even if one component fails, the system can continue to operate reliably. The Vibration Input Assembly is responsible for capturing and processing vibration signals from industrial machinery and equipment. It is equipped with sensors and circuitry designed to accurately measure and monitor vibration levels, allowing for the detection of potential faults or abnormalities in the machinery. It can receive real-time vibration data, enabling them to detect and diagnose potential issues with the machinery. This information can be crucial for preventive maintenance, helping to avoid costly breakdowns and ensuring the overall efficiency and reliability of the industrial process.

Keyphasor Inputs

• Vibration signal is combined with a direct current (dc) bias voltage to create the desired input voltage range. This process involves adding a -11 V dc bias to the B/N buffered signal with a tolerance of �5%.
• When the system is configured for seismic transducers, additional modifications are made to the input. Firstly, a negative bias is introduced to the input for open circuit detection purposes. This allows the system to detect when the input circuit is open or not properly connected.
• Furthermore, the PRxxL signal, which is related to the seismic transducer, is opened to enable a true differential reading. This adjustment is necessary to meet the requirements of common mode rejection, which ensures accurate measurement and minimizes interference from common electrical noise.
• The open circuit reading refers to the voltage level of the dc component in the absence of a connected transducer or when the input is left open. The specific values for the gap voltage (dc component) in different scenarios are as follows:
  • For Prox, Accel, and Velomitor inputs, the open circuit reading should be more positive than -1.0 V dc. This means that the dc component of the signal should have a voltage level greater than -1.0 V.
  • For Seismic inputs, the open circuit reading should be more negative than -15 V dc. This indicates that the dc component of the signal should have a voltage level lower than -15 V.
• For Position Inputs, the open circuit reading for the gap voltage (dc component) should be more positive than -1.0 V dc, similar to the Prox, Accel, and Velomitor inputs.
• For Phasor Inputs, the open circuit reading for the gap voltage (dc component) should also be more positive than -1.0 V dc.
• These voltage level specifications ensure proper functioning of the system and provide reference values for diagnosing and troubleshooting potential issues related to the open circuit condition or gap voltage in the respective input types.

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Frequently Asked Questions

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What is IS230TNVBH1A?
It is an Vibration Input Assembly developed by GE.

What does it mean to say that a vibration signal is superimposed upon a dc bias voltage?
When a vibration signal is superimposed upon a dc bias voltage, it means that the vibration signal, which represents the varying component of the input, is combined with a constant dc voltage. This combination allows the input signal to have a defined voltage range that includes both positive and negative values.

What is the purpose of adding a -11 V dc bias to the B/N buffered signal?
The -11 V dc bias is added to the B/N buffered signal to establish a specific voltage reference point. This bias helps ensure that the vibration signal falls within the desired input voltage range and allows for accurate measurement and analysis of the vibration data.

Why is a dc bias voltage added to the vibration signal?
Adding a dc bias voltage to the vibration signal helps establish a reference point and ensures that the input signal falls within a defined voltage range. This range allows for accurate measurement and analysis of the vibration data. By superimposing the vibration signal on a dc bias, it becomes possible to capture both positive and negative variations in the signal.