GE IC660EBD025 Mark VI series processor board

GE IC660EBD025 Mark VI series processor board

Working principle:

Principle of analog output

Servo drive signal generation: This module is equipped with two servo output channels. Through internal circuit design and control logic, based on the control instructions input by the system, such as the speed or position setting values of the autonomous controller, after signal processing and conversion, drive signals of different current intensities are generated. Since the servo coil current between 10 and 120mA can be selected through jumpers to adapt to servo valves with different power requirements. For instance, when the system requires precise adjustment of the valve, the module will output a signal of a specific current to drive the servo valve to act, thereby controlling the valve opening and achieving precise control of parameters such as fluid flow and pressure.

12-bit analog output accuracy guarantee: By using the 12-bit analog output resolution, the input digital signal can be converted into a high-precision analog output. In practical work, the digital control instructions sent by the main controller are converted into corresponding analog voltage or current signals through a digital-to-analog conversion circuit for output. A 12-bit resolution means that the full scale can be equally divided into 4096 grades (2 to the power of 12), thus meeting the requirements of industrial application scenarios with high control accuracy, such as in the control of precision processing equipment, ensuring that the actuator can act according to precise instructions.

The principle of position sensing data processing

LVDT sensor signal acquisition: Connect to the LVDT sensor through six I/O interfaces for linear variable differential transformer (LVDT) position sensors. The LVDT sensor is based on the principle of electromagnetic induction. When the position of the measured object changes, it will cause the mutual inductance of the coil inside the LVDT to change, thereby outputting an electrical signal proportional to the displacement. The IC660EBD025 module collects these electrical signals in real time to obtain the position information of the monitored object.

Position data processing and feedback: The collected LVDT sensor signals will undergo amplification, filtering and other preprocessing within the module to remove noise interference from the signals and improve signal quality. Then, the processed signal is converted into a digital signal and transmitted to the VSVO processor board through a 37-pin cable. The main control system compares the received position data with the set value, calculates the deviation, and adjusts the control strategy accordingly to achieve precise closed-loop control of the equipment position. For example, during the operation of the steam turbine, the rotor position is monitored in real time to ensure that it operates within a safe range.

Principle of Flow Monitoring

Pulse signal acquisition: The two active pulse rate input channels of this module for flow monitoring can be connected to flow pulse sensors. When the fluid passes through the flow sensor, the sensor will generate pulse signals of corresponding frequencies according to the size of the flow. The module collects these pulse signals through specific circuits and acquires the number of pulses within a unit of time in real time.

Flow calculation and feedback: Within the module, the collected pulse signals are counted and processed. Based on the pre-set conversion relationship between flow and pulse frequency, the actual fluid flow is calculated. Then, the calculated flow data is transmitted to the main control system through 37-pin cables. Operators can determine whether the production process is normal based on these flow data, or the control system can automatically adjust the operating parameters of relevant equipment according to the flow data to ensure the stable progress of the production process.

Principles of Communication and System Integration

Data transmission: It is connected to the VSVO processor board via a 37-pin cable to achieve data interaction with other modules. On the one hand, the collected data such as location and flow are sent to the main control system to provide a basis for the decision-making of the main control system; On the other hand, it receives control instructions from the autonomous control system, adjusts its own output signals according to the instructions, and drives external devices to act.

System collaboration: In the entire GE Speedtronic control system, the IC660EBD025 module works collaboratively with other hardware components (such as the main controller, human-machine interface, etc.) and the software system. By following a unified communication protocol and data format, the distributed control and centralized management of the system are achieved, ensuring that industrial equipment can operate safely and efficiently in accordance with the predetermined process flow.

Functional characteristics:

Analog output function

Isolated 12-bit analog output: This module has the capability of isolated 12-bit analog output and can provide relatively accurate analog signal output. This is very crucial in some industrial applications with high requirements for control accuracy, such as the precise control of valve opening. By outputting different analog signals, fine regulation of the valve can be achieved, thereby accurately controlling parameters such as fluid flow and pressure.

Servo output: It has two servo output channels and can be used to drive servo valves and other equipment. The current of the servo coil between 10 and 120mA can be selected through the jumper, and it is suitable for the resistance of the servo valve coil ranging from 22W to 1,000W. For instance, when the jumper is set to 120B, it can provide approximately 120mA of coil current, meeting the driving requirements of servo valves with different power demands and achieving precise position or speed control of mechanical systems.

Position sensor I/O function

LVDT position sensor interface: Equipped with I/O for six linear variable differential transformer (LVDT) position sensors. LVDT is often used to precisely measure the linear displacement of objects. This module can be connected to these sensors to obtain position data in real time. In industrial steam turbines, gas turbines and other equipment, by connecting LVDT sensors, the position of the steam turbine rotor, the actual opening degree of the valve, etc. can be precisely monitored, so that the control system can make precise adjustments according to the actual position to ensure that the equipment operates in a safe and efficient state.

Flow monitoring function

Active pulse rate input: It has two active pulse rate input channels for flow monitoring. It can be connected to a flow pulse sensor. By detecting the number of pulses within a unit of time, the flow of the fluid can be calculated. In scenarios such as material transportation in chemical production processes and cooling water flow monitoring in power plants, this function can provide real-time feedback on flow information, helping operators adjust production processes in a timely manner and ensuring the continuity and stability of production.

Connection and installation features

Data connection: A 37-pin cable is used to connect it to the VSVO processor board to ensure stable and reliable data transmission with other components, and to achieve collaborative operation among all modules of the entire control system.

Installation method: To save cabinet space, the power strips can be vertically stacked on the DIN rail. This flexible installation method facilitates the layout and installation in the industrial control cabinet, making system integration more convenient.

Diagnosis and identification function

On-board ID chip: Connectors JR1 and J5 are connected to signals from the on-board ID chip. Through these signals, relevant information of the VSVO board can be identified, facilitating system diagnosis. When maintaining equipment and troubleshooting, technicians can quickly and accurately determine the model, version and other information of the module, improving the efficiency of fault location and resolution.

Application scenarios:

Power plant control system: It can be used in the DCS monitoring system of power plants to monitor and control the operating status of generators. By connecting various sensors, parameters such as the generator's rotational speed, voltage and current can be obtained in real time. At the same time, relevant equipment can be adjusted according to control instructions to ensure the stable operation and efficient power generation of the power generation process.

Steel and metallurgy industry: In the steel production process, it can be applied to the control systems of equipment such as blast furnaces and converters. For instance, precise control is carried out on parameters such as the top pressure and temperature of blast furnaces. By controlling actuators like servo valves, air volume and material transportation are regulated to ensure the stability of the steel production process and product quality.

In the petrochemical field: It is applicable to various process controls in petrochemical production, such as temperature and pressure control of reactors, liquid level and flow control of distillation columns, etc. By using its analog output function, the opening degree of the control valve can be precisely adjusted to achieve precise control of chemical process parameters and ensure the safety and efficiency of the production process.

Intelligent flat tempering furnace system: In the intelligent flat tempering furnace, it can be used to control parameters such as the uniformity of temperature inside the furnace and the speed of glass transfer. By cooperating with the position sensor, the position of the glass in the furnace is precisely monitored. At the same time, the servo motor is controlled to drive the transmission device, ensuring that the glass can be heated and cooled in accordance with the set process requirements, and qualified tempered glass products can be produced.

Mechanical manufacturing automated production line: It can be integrated into the automated production line of mechanical manufacturing to achieve control over various processing equipment and conveying equipment. For instance, by controlling the feed rate and spindle speed of machine tools, as well as the positioning and transmission of workpieces on the automated conveyor line, and through collaborative work with other equipment, the degree of automation and production efficiency of the production line can be enhanced.