Product Overview
The GE IS200VRTDH1DAB is a Resistance Temperature Device (RTD) processor board from the Mark VI control system series. It is engineered to excite RTDs, capture their signals, and convert them into accurate digital temperature values for turbine management. As part of the Mark VI Speedtronic line, this board supports reliable and precise temperature monitoring in demanding industrial environments.
Technical Specifications
Below are the key parameters for the IS200VRTDH1DAB, sourced directly from the manufacturer data:
| Parameter |
Value |
| Number of Channels |
16 channels |
| Span |
0.3532 to 4.054 V |
| Common Mode Voltage Range |
5 V |
| Maximum Lead Resistance |
15 ohm maximum |
| Fast Scan Rate |
40 ms (25 Hz) |
| Power Consumption |
Less than 12 W |
| Product Type |
Resistance Temperature Device |
| Series |
Mark VI |
These specifications ensure the IS200VRTDH1DAB delivers precise temperature readings while maintaining low power draw, making it suitable for continuous operation.
Functional Operation
The IS200VRTDH1DAB works in conjunction with terminal boards to form an integrated RTD sensing system. The processor board excites each RTD, receives the returning signals, and processes them to extract temperature data. This data is then converted to digital values with the help of the I/O processor board and transmitted over the VME backplane to the VCMI board and controller for system decision-making.
A key feature is high-frequency decoupling at the signal entry point, which protects RTD signals from electromagnetic interference. Redundant pacemakers in the multiplexing process ensure that even if a cable or board fails, temperature data remains available without interruption. Additionally, the boards in modules R, S, and T read RTDs with a skew of two, preventing simultaneous excitation of the same RTD and maintaining data integrity.
Hardware Design and Reliability
The IS200VRTDH1DAB is built with a conformal coating and includes over two hundred integrated circuits, capacitors, and several hundred resistors. The board features two backplane connectors on its rear edge and a front faceplate attached with three screws, indicating its standard VME rack mounting. Voltage protection is ensured through series-standardized components. The board identifies itself with the manufacturer logo and board ID number, including codes like “6BA01” and “94V-0”.
RTD short and open circuits are detected by out-of-range values, and such channels are automatically removed from scanning to prevent adverse effects. They can be reinstated manually or automatically every twenty seconds if they return to range.
Applications
The IS200VRTDH1DAB is primarily used in steam and gas turbine management systems, where accurate temperature monitoring is critical for safe and efficient operation. Its robust design and redundant features make it ideal for:
- Turbine exhaust temperature monitoring
- Bearing temperature sensing
- Generator cooling system temperature tracking
With its 16 channels and fast scan rate, the board supports real-time monitoring in high-speed control environments.
Installation and Setup
Install the IS200VRTDH1DAB into a standard VME rack using the front faceplate and three screws. Ensure the backplane connectors align properly with the rack's backplane. Verify that the common mode voltage and lead resistance are within the specified limits to avoid measurement errors. For detailed wiring and configuration, refer to the Mark VI Turbine Control System Guide Vol II (GEH-6421).
Maintenance and Longevity
Regularly inspect the board for dust accumulation or component degradation. Check that all connectors remain secure and free from corrosion. The board's conformal coating provides protection against moisture and contaminants. Given its low power consumption and robust design, the IS200VRTDH1DAB offers extended service life, reducing downtime and maintenance costs.
Selection Guide
When selecting the IS200VRTDH1DAB, confirm that your system is a Mark VI series and that the VME backplane is compatible. Verify the required channel count and scan rate match your application needs. For reliable sourcing, PLC Source PRO offers this module in stock, ensuring quick delivery and genuine parts.