SPECIFICATIONS
Part Number: DS200DMCAG1A
Manufacturer: General Electric
Series: EX2000
Function: IOS Main Control Board
Power Requirements: +5 V dc, 6 A
Number of relay channels: 12
Power supply voltage: 28 V dc
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -30 to +65 degrees Celsius
Size: 15.9 cm high x 17.8 cm
Product Type: PCB
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States (USA)
Manual: GEH-6120B
Functional Description
DS200DMCAG1A is an IOS Main Control Board manufactured by General Electrics. It is a part of the EX2000 Series used in GE Excitation Turbine Control Systems. The IOS Main Control Board is the Main Control Board of IOS, IOS+, and IEI units. The primary functions of the board are to supply the control power requirements and to provide an interface and a data processing unit for the following information paths:
- Operator keypad and display
- Drive Local Area Network (DLAN)
- ARCNET-based DLAN (DLAN+) optional module
- Genius LAN controller optional daughterboard
- An RS-232C communications port
- Local logic input and output optional interface boards
- IOEA Input/Output expansion interface board
DS200DMCAG1A Features
- The module functions as an Interface board. On the surface of this board, there are several connectors. Three vertical pin header connectors, four vertical pin male cable connectors, and one female cable connector are included. A number of stab-on connectors are also employed.
- A reset switch, two fuses, seventeen resistor network arrays, four LED banks with varying numbers of LED lights per bank, fifteen resistor network arrays, a small auxiliary board with several integrated circuits, and two heat sinks populate the board. On the board's surface, there are over fifty integrated circuits, as well as various resistors, six high voltage electrolytic capacitors, smaller ceramic and polyester vinyl capacitors, diodes, an inductor coil, and transistors.
- There is an auxiliary board mounted to the board.
System Software Design
- The exciter application consists of functional software modules (blocks) combined to perform to system requirements. Variables are kept in random-access memory (RAM), while block definitions and configuration information are saved in read-only memory (ROM) (RAM). Microcontrollers execute the code.
- The exciter application emulates traditional analog controls. The software employs an open architecture framework, which uses a library of existing software modules. Each blocks perform particular operations such as logical AND gates, PI regulators, function generators, and signal level detectors.
- These components are connected together in a pattern to construct complicated control systems. For example, a control function such as the under-excitation limit (UEL) is included as an ac regulator input by setting software jumpers in EEPROM. The relevant blockware is enabled by pointing the block inputs to RAM locations where the inputs reside (the UEL requires megawatts, kilovolts and megavars). The UEL output is then connected to an ac regulator summing junction input.
Product Attributes
- The board requires a power input of +5 V dc, with a current draw of up to 6 A.
- It has 12 relay channels, which can be used to control a variety of electrical devices.
- The board is designed to operate with a power supply voltage of 28 V dc.
- It is intended for DIN-rail mounting, which makes it easy to install and secure within an electrical cabinet or enclosure.
- Built using surface mount technology, which allows for a more compact design and improved reliability compared to through-hole components.
- Board measures 15.9 cm in height and 17.8 cm in width, providing a compact yet feature-rich solution for controlling and monitoring electrical equipment.
Configuration Tools
- The EX2000 exciter is configured, maintained, and fine-tuned using the toolbox. It is made up of a set of programs (tools) that run under a command shell on an IBM PC-compatible computer. The toolbox includes a large database of EX2000 definitions that can be accessed and manipulated through menu-driven selections. Furthermore, the toolbox program can display the exciter's program logic graphically on the computer screen. The user can better understand and manipulate the exciter's adjustable values by viewing the logic flow.
- At the factory, the toolbox is used to configure and test the systems. The tools enable personnel to troubleshoot, fine-tune, and maintain the installed EX2000 exciter at the customer site. Optional modules display real-time control variables and communications data.
Field Flashing
- The field flashing module in a terminal fed exciter supplies the initial field current to the generator. This allows the generator voltage to rise to a level sufficient for self-sustaining operation. Field flashing in the EX2000 works by limiting the flashing current to a value between a minimum and a maximum level determined by AFNL and set by EE.3742 and EE.3743. The flashing current level is measured at the address specified in EE.3741, which is typically VAR.1017 (the flashing shunt feedback variable).
- The start engine also monitors an EE.3745 variable (normally IFE or IFG) to see if the exciter is becoming self-sustaining. If the detected feedbacks exceed the defined limits, or if the excitation does not become self-sustaining within the time limit specified by the start engine, the field flashing stops and an appropriate fault message is generated.
Fault Detection
- The exciter has advanced self-diagnostic capabilities. If a problem occurs, a fault code with a fault name and number flashes in the Programmer display.
- The fault number is also displayed in coded form on the SDCC display. For a description of how to interpret the display, as well as a definition of each fault code and recommended action. A number of faults are also displayed on the system alarm status display on the IOS, depending on the type of exciter system and its configuration.
WOC is happy to assist you with any of your GE requirements. Please contact us by phone or email for pricing and availability on any parts and repairs.
FREQUENTLY ASKED QUESTIONS
What is DS200DMCAG1A?
It is a IOS Main Control Board developed by GE
What connectors are present on the surface of the board?
There are three vertical pin header connectors, four vertical pin male cable connectors, and one female cable connector.
What is the purpose of the LED banks?
The LED banks are used to provide visual indicators for various signals and statuses of the board.
What does the exciter application consist of?
The exciter application consists of functional software modules (blocks) combined to perform system requirements.
Where are variables kept in the exciter application?
Variables are kept in random-access memory (RAM), while block definitions and configuration information are saved in read-only memory (ROM).
What executes the code in the exciter application?
Microcontrollers execute the code in the exciter application.
