SPECIFICATIONS
Part Number: DS200KLDCF1AAB
Manufacturer: General Electric
Series: Mark V
Product type: Software EPROM
Availability: In Stock
Country of Manufacture: United States (USA)
Functional Description
DS200KLDCF1AAB is a Software EPROM designed and developed by GE. It is a part of the Mark V control system. The Mark V I/O system is specifically engineered to establish direct connections with various turbine and generator components, which include magnetic speed pickups, servos, LVDT/Rs, vibration sensors, thermocouples, and Resistive Temperature Devices (RTDs). This design enables seamless integration and communication between the Mark V and these essential devices, ensuring efficient and reliable operation.
System Contact Inputs
- Contact Inputs in the Mark V system serve a crucial role in its operation. The primary power source for these inputs is derived from the internal power distribution core, harnessing the 125 V dc bus. This power supply is thoughtfully designed to offer fuse isolation and current limitation, ensuring the safe and effective interrogation of the contact inputs. While the Mark V primarily utilizes 125 V dc, it's worth noting that input voltages ranging from 24 V dc to 125 V dc can also be accommodated. However, it's important to acknowledge that these lower voltage options may necessitate an external power source, separate from the Mark V unit itself.
- To enhance the flexibility of the system, jumpers are strategically placed on the terminal boards. These jumpers allow for the isolation of field grounds by disconnecting the interrogation voltage from the contact inputs in groups of eight. This modular approach streamlines maintenance and troubleshooting, making it easier to identify and address issues within specific groups of contact inputs.
- Each contact input is furnished with optical isolation, which not only enhances safety but also ensures the accuracy of data collection. Moreover, these inputs are remarkably responsive, providing a time stamp within 1 millisecond of any change in status. This time stamp feature proves invaluable for tracking and logging purposes. When configured for sequence of events (SOE) logging, the Mark V printer can diligently record each status alteration of the contact inputs, complete with their respective time stamps. This capability is essential for analyzing and documenting the chronological sequence of events, aiding in diagnostic and operational assessments.
- In terms of system reliability, diagnostic circuitry takes center stage. This circuitry continuously tests the internal electronics of each contact input at an astonishing rate of every 1 millisecond. This rapid and proactive diagnostic approach is a key component in ensuring the system's dependability. In the event that any of the circuitry within these contact inputs experiences a failure, the system promptly initiates an alarm. This proactive response mechanism is critical in maintaining the overall health and reliability of the Mark V system and providing peace of mind in its operation.
Product Attributes
- EPROMs (Erasable Programmable Read-Only Memory) are sophisticated semiconductor devices comprising an intricate array of floating gate Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) arranged beneath a control gate transistor. These transistors are separated by an exceedingly thin insulating oxide layer, forming the fundamental structure of an EPROM cell.
- Programming an EPROM involves a specialized process wherein a relatively high voltage is applied to the control gate. This voltage application induces a phenomenon where electrons are compelled to traverse through the insulating oxide layer, moving into the floating gate. This movement of electrons alters the charge distribution within the floating gate, impeding subsequent operations of the control gate.
- When the floating gate remains electrically coupled to the control gate, signifying the presence of stored charge, the cell holds a value of 1. To reverse this value to 0, a process known as tunneling is employed. Tunneling involves manipulating the arrangement of electrons within the floating gate. Upon the application of electrical charge to the floating gate, electrons enter it and eventually discharge to ground.
- During this process, the excited electrons become confined on the far side of the oxide layer, acquiring a negative charge. Simultaneously, they form a barrier between the control gate and the floating gate. The configuration and movement of these electrons significantly impact the behavior of the EPROM cell.
- The determination of the cell's stored value relies on the comparative charge distribution within the floating gate. If the electron flow through the gate constitutes more than 50% of the charge it initially stored, the cell retains a value of 1. Conversely, when the charge diminishes below the 50% threshold, the cell's stored value changes to 0.
- This meticulous interplay of electron movement, charge distribution, and the intricate dynamics between the control gate and the floating gate form the basis for storing and manipulating data within an EPROM. This process ensures the accurate representation and retention of binary information, crucial for its functioning as a non-volatile memory device.
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FREQUENTLY ASKED QUESTIONS
What is DS200KLDCF1AAB?
It is a Software EPROM designed and developed by GE
What is the power source for the contact inputs in the Mark V system?
The primary power source for contact inputs in the Mark V system is the 125 V dc bus derived from its internal power distribution core.
Can I use input voltages other than 125 V dc for the contact inputs?
Yes, you can use input voltages ranging from 24 V dc to 125 V dc. However, lower voltage options may require an external power source separate from the Mark V unit.
How can I isolate field grounds in the contact inputs?
Field grounds can be isolated by utilizing jumpers located on the terminal boards. These jumpers allow the disconnection of the interrogation voltage from the contact inputs in groups of eight, offering a modular approach to maintenance.
What is optical isolation in contact inputs, and why is it important?
Optical isolation is a safety feature that separates the input and output circuits using light. It's important because it enhances safety and ensures the accuracy of data collection by preventing electrical interference.
How quickly does each contact input provide a time stamp of a status change?
Each contact input provides a time stamp within 1 millisecond of any change in its status, ensuring precise event recording.
