DS3800NDAC - Analog Output Card

SPECIFICATIONS

Part Number: DS3800NDAC
Manufacturer: General Electric
Series: Mark IV
Function: Analog Output Card
Product Type: PCB
Number of channels: 12
Operating temperature: -30 to 55 degrees Celsius
Size: 8.25 cm high x 4.18 cm
Repair: 3-7 Day
Availability: In Stock
Country of manufacturer: United States (USA)

Functional Description

DS3800NDAC is an Analog Output Card designed and developed by GE. It is a part of mark IV control system. An analog output card in a turbine control system is a device that converts digital signals from the control system into analog signals that can be used to control the operation of the turbine. It typically consists of a circuit board with one or more digital-to-analog converters (DACs) that convert digital signals into voltage or current signals that can be used to control various components of the turbine, such as valves, pumps, and motors.

The analog output card is an essential component of a turbine control system, as it allows the digital signals from the control system to be converted into physical signals that can be used to control the operation of the turbine. The card typically interfaces with the control system through a communication bus or other interface and may include built-in diagnostics and monitoring capabilities to ensure proper operation and detect faults or errors in the system.

Features

• High-Resolution DACs: The analog output card will typically feature high-resolution digital-to-analog converters (DACs) that can provide accurate and precise control signals to the various components of the turbine.
• Multiple Channels: The card may include multiple channels, each with its own DAC, which allows for the simultaneous control of multiple components or subsystems of the turbine.
• Onboard Diagnostics: The analog output card may include onboard diagnostic and monitoring capabilities that can detect faults or errors in the system, and alert operators to potential issues.
• Calibration: The card may feature a calibration function that allows for precise adjustment of the output voltage or current, to ensure that the control signals are accurate and within the desired range.
• Signal isolation: To prevent interference or noise from affecting the control signals, the analog output card may feature signal isolation capabilities that help to maintain the integrity of the output signals.
• Compatibility: The card will typically be designed to interface with the specific control system being used in the turbine and may be compatible with various communication protocols or bus systems.

Operator Interface

• The vast majority of this work is done from the panel side. That is significant from the standpoint of reliability; one incorrect move within the old-style control can cause the turbine to trip. The control constants display is used to make most Mark IV settings.
• If the operator wants to change the value for a previously selected load, he will navigate to the control constants display and select the appropriate page. For entering the adjust mode, the CRT will label one of the undedicated switches. These switches are known as'soft' switches because they are identified by software. When you press this soft switch, the Mark IV will prompt you for your password.
• After entering the correct number, the operator adjusts the range using the cursor and the increment or decrement switches. This process may appear complicated, but it is simple to master in a matter of minutes. In fact, it is far simpler than the older method of using jumper wires to connect digital voltmeters to the correct points, turning pots with a tiny screwdriver, and converting volts to engineering units. Another advantage of the Mark IV is the ease with which the settings can be recorded using the printer.

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FREQUENTLY ASKED QUESTIONS

What is DS3800NDAC?
It is an Analog Output Card developed by GE

What are EEPROMs in NDAC?
EEPROMs are electrically erasable programmable read-only memory chips that are present in NDAC. The program data needed by the board to operate is pre-loaded into the EEPROMs.

What are the goals of the Mark IV's hardware design?
The goals of the Mark IV's hardware design include having a base design that can satisfy 95% of the hardware requirements of the customer panel, being able to fix the panel while the turbine is spinning, and having front doors where modules with the majority of the active components are situated.

What is the control constants display?
The control constants display is used to make most Mark IV settings. If the operator wants to change the value for a previously selected load, he will navigate to the control constants display and select the appropriate page.

What are soft switches?
Soft switches are undedicated switches that are identified by software. When the operator presses this soft switch, the Mark IV will prompt for a password.