Description
Part No: DS200FCGDH1B Manufacturer: General Electric Product Type: Gate Distribution and Status Card Function: DIN-rail mounting Series: Mark VI Number of Channels: 12 Span: -8 mV to +45 mV Operating temperature: -30 to 65 ºC Power Supply Voltage: 24 V dc Board Size: 9.2x6.3 inch Weight: 0.45 kg Country of Origin: USA
FUNCTIONAL DESCRIPTION:
DS200FCGDH1B is a Gate Distribution and Status Card manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Control Systems. An interface board for a 6-pulse phase-controlled, non-reversing bridge is called the Gate Distribution and Status Card (FCGD). Through the VME backplane, it transmits feedback and diagnostic data after receiving SCR firing data from the DS200DSPC (DSPC, the VME processor) chip. The FCGD receives a multiplexed cell status signal from each bridge leg and decodes and de-tributes the cell gating signals for each bridge leg. Additionally, it takes in bridge feedback signals, scales them, and then transmits the voltage, frequency, and current status data back to the DSPC board.
BOARD FUNCTIONS:
SYSTEM CLOCK: The FCGD features a system clock register that produces firing commands and timestamp feedback values. This 16-bit up-counter ends when it reaches the hexadecimal value 0FFFFH and resets to 0.
SYSTEM RESET: During power-ups or hardware resets, the system reset signal sets all of the registers on the board to their starting settings.
SYSTEM HEARTBEAT: An electronic component's heartbeat serves as a periodic signal indicating that the component is still operational. This function is supported by the FCGD's system heartbeat register. The board-level heartbeat starts to count after the VME host CPU writes to it for the first time, and an IMOK-labeled green board-front LED turns on.
FIRING COMMANDS: A firing mask register with six entries that correspond to the six-cell strings in a bridge controls the fiber-optic firing signal transmitters. Up to six fiber-optic transmitters can be turned on simultaneously by the FCGD. The host CPU has the option to directly write data to the firing mask register across the VME bus connection.
VOLTAGE FEEDBACK FROM NATO: Over a 20-pin ribbon wire, the Voltage Feedback Scaling (NATO) board sends input signals to the FCGD (see Table 5). These signals include three ac voltages referred to ground through a local resistor, five attenuated analog voltage signals that correspond to plus and negative dc and five attenuated analog voltage signals. To maintain the output signals inside the 10 V range of the signal electronics, the input range is rescaled using the jumpers on NATO. The VME backplane has test points for the Va, Vb, Vc, Vp, and Vn signals.
ANALOG AND DIGITAL CONDITIONING: For analog voltage, current, and flux feedback, voltage-controlled oscillators are utilized. The VCOs are driven by the signals VA, VB, VC, VDC, IA, IC, FLUXBAR, and FLUXCBR (see Table 1). Additionally, six parallel Sigma-Delta converters that work with the VCOs are fed with the voltage and current signals.
A communication module is a hardware or software component that enables data transmission and communication between devices. It acts as a bridge between devices, allowing data to be passed and communicated between different devices. Communication modules play a vital role in modern communication systems, they can realize the transmission, reception and processing of data, but also provide a safe and stable communication environment. Function of communication module 1. Data transmission function: The communication module can realize data transmission between devices, including real-time data, audio, video and other different types of data. They transmit data from the source device to the target device through various communication protocols and technologies, such as wireless networks, Bluetooth, Ethernet, etc. 2. Data reception and processing function: The communication module can receive the data sent from other devices, and process and decode the data. They are able to identify and extract useful information, which is then passed on to the target device for further processing or display. 3. Security guarantee function: The communication module can provide security guarantee measures to ensure the safe transmission of data. They use encryption and authentication mechanisms to prevent illegal access and data leaks. 4. Network connection function: The communication module can establish a network connection between devices, so that devices can communicate and cooperate with each other. They can connect to different networks, such as local area networks, wide area networks, etc., to achieve remote control and management of devices.
1.1 Digital/analog signal difference The digital input/output signal is the switching signal, 1 or 0, Analog signals, there are two, voltage or current signals, generally the signal transmitted by the transmitter, such as the pressure transmitter to detect the pressure of the water pipe, it will output an analog signal 4-20mA or 0-10V signal to the PLC, PLC for data processing. The switching input point (DI) processes the switching input signal. Analog input point (AI), processing analog input signals (0-20mADC,0-5VDC). Resistance signal (including thermal resistance) input point, processing thermal resistance or general resistance signal. High-speed pulse input point, processing high-speed pulse signal. Voltage (including thermocouple) input point, processing voltage input or thermocouple signal. There is also communication, which is used to exchange data with the upper computer or control the instrument driver of the lower controller 1.2 Difference between digital and analog input modules According to the difference of field input signal, the input module can be divided into switching input module and analog input module. The function of the switching input module is to convert various switching signals into TTL standard signals required by the CPU. According to the input power supply type, it can be divided into DC input module and AC input module. The input signal is converted into TTL (5V) standard signal by photoelectric coupling after voltage division, current limiting and filtering. The function of the analog input module is to convert the continuously changing analog signals such as temperature, flow, current, voltage, etc. into several digital signals that the CPU can process. The analog input circuit is generally composed of op amp conversion, mode conversion (A/D), photoelectric isolation, etc. Types of PLC input and output modules: digital input DI, digital output DO, analog input AI, analog output AO. Digital input and output are generally 24V. There are 4 kinds of analog quantities in 2 categories, and the 2 categories are voltage type and current type respectively. Voltage type has 0-10V and -10 to 10V. Current type mainly has 4-20MA,0-20MA. Then the module converts the analog quantity into A number between +32767 and -32768 through A/D conversion, and then implements the control. The function of the signal template is to convert various process i/o signals. The input signals are converted into digital quantities, which are easy for plc to identify, process and analyze. The output is converted into analog to various regulating mechanisms for execution, or the output is converted into a 2-bit do quantity to control some devices such as start, stop, on and off
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