IS200VRTDH1CBA - RTD Processor Board

SPECIFICATIONS

Part No.: IS200VRTDH1CBA
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Number of channels: 16 channels
Span: 0.3532 to 4.054 V
A/D converter resolution: 14-bit resolution
Scan Time: Normal scan 250 ms (4 Hz)
Fast scan: 40 ms (25 Hz)
Power consumption: Less than 12 W
Product Type: RTD processor board
Availability: In Stock
Series: Mark VI

Functional Description

IS200VRTDH1CBA is an RTD processor board developed by GE. It is a part of the Mark VI control system. The board is designed to accept inputs from 16 RTDs, each utilizing a three-wire configuration. This compatibility ensures seamless integration with a wide range of RTD sensors commonly employed for temperature measurement applications. The RTD inputs from the sensors are wired to the RTD terminal board, which serves as the interface between the sensors and the processor board. This connection facilitates the transmission of temperature data from the sensors to the processor board for further processing.The board offers the flexibility to connect to the DRTD DIN-type terminal board if required. This option provides versatility in system configuration, allowing users to adapt the setup based on specific application needs. Cables equipped with molded fittings are utilized to establish connections between the terminal board and processor board. These cables ensure secure and reliable data transmission, maintaining signal integrity throughout the system.

Input Configuration and Terminal Boards

• RTD Inputs: The processor board accommodates a total of 16 three-wire inputs. These inputs serve as the primary means of temperature sensing within the system.
• Wiring to Terminal Boards:The three-wire RTD inputs are carefully wired to the RTD terminal board. This wiring establishes the connection between the RTDs and the processing system, ensuring accurate transmission of temperature data.
• DRTD DIN-Type Terminal Board:Additionally, the system provides flexibility by allowing the connection of a DRTD DIN-type terminal board. This option caters to different RTD configurations and enhances the adaptability of the temperature sensing system.

Cable Connections and Location

• Molded Fitting Cables: To establish connectivity between the terminal board and the VME rack, specialized cables with molded fittings are employed. These cables ensure secure and reliable connections, minimizing the risk of signal interference or data loss during transmission.
• VME Rack Connection: The terminal board connects to the VME rack, where the processor board is strategically located. This central location facilitates efficient data processing and communication with other components of the system.

Installation

Power Down the VME Processor Rack:

• Initiate Controlled Shutdown: Before initiating the installation process, it is crucial to perform a controlled shutdown of the VME processor rack. Safely halt all connected systems and processes to avoid any potential electrical hazards.
• Confirm Power Down: Verify that the VME processor rack is completely powered down. Ensure that all lights and indicators on the front panel are extinguished, indicating a safe and secure power-off state.

Slide in the VRTD Board:

• Identify the Designated Slot: Locate the designated slot within the VME processor rack where the board is intended to be installed. Reference the system documentation or markings on the rack for the correct slot.
• Align the Board: Carefully align with the slot, ensuring that the edge connectors on the board match the corresponding connectors within the rack. Take care to align the board evenly for a proper fit.
• Engage Top and Bottom Levers: With VRTD correctly aligned, use your hands to push in the top and bottom levers. This action secures the edge connectors of the board within the slot, providing a stable and reliable connection.

Tighten Captive Screws:

• Locate Captive Screws:Identify the captive screws located at the top and bottom of the front panel of the VRTD board. These screws play a crucial role in securing the board in place.
• Use Appropriate Tool: Utilize an appropriate tool, such as a screwdriver, to tighten the captive screws. Ensure that the screws are securely fastened, preventing any unintended movement or dislodging of the board.

Final Checks:

• Verify Secure Connection:Confirm that the board is securely seated in the designated slot. Check for any play or misalignment and adjust if necessary.

Power Up the VME Rack:

• Restore Power: Once the board is securely installed and captive screws are tightened, proceed to restore power to the VME processor rack. Reconnect the power source and initiate the power-up sequence.
• Check for Diagnostics: After powering up, observe the diagnostic indicators on the VRTD board and the VME rack. Ensure that the system enters the expected operational state and that the board is recognized within the system.

The WOC team is always available to help you with your Mark VI requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS200VRTDH1CBA?
It is an RTD processor board developed by GE under the Mark VI series.

How are high-frequency decoupling and signal integrity ensured for RTD signals on the boards?
All RTD signals undergo high-frequency decoupling to ground at the signal entry points. This crucial design feature helps mitigate the impact of high-frequency noise, ensuring signal integrity and accurate temperature readings from the RTDs.

How is the multiplexing of RTDs coordinated on the boards?
RTD multiplexing is meticulously coordinated by redundant pacemakers. This redundancy ensures that the loss of a single cable or the failure of a single board does not result in the loss of any RTD signals in the control database. The pacemakers synchronize the multiplexing process, enhancing the system's robustness and fault tolerance.

How do the VRTD in R, S, and T operate in reading RTDs simultaneously?
VRTD boards in R, S, and T operate by reading RTDs simultaneously but with a specific skewing mechanism. The readings are offset by two RTDs, meaning that when one board (e.g., R) is reading a particular RTD (e.g., RTD3), the other boards (S and T) are reading different RTDs (e.g., RTD5 and RTD7, respectively). This strategic skewing ensures that the same RTD is not excited by two boards simultaneously, preventing the generation of inaccurate readings and maintaining data integrity.