8300A series main frame power supply: With diverse input voltages, it is suitable for powering the main frames of industrial control systems in different power supply environments. For example, in some large-scale industrial automation production lines, if the main frame has flexible requirements for power input voltage, this series of power supplies can be selected to provide power support for various control modules within the frame.
8305A Series Expansion/RXM Rack Power Supply: Primarily used to power expansion racks or RXM racks. When industrial control systems require the expansion of additional I/O modules or other functional modules, this series of power supplies can be utilized to provide stable power to the expansion racks, ensuring the normal operation of the expanded components, such as in chemical production process control systems that require continuous increases in the number of monitoring points.
Power supply for 8310 series control system: suitable for applications where safety and reliability are of utmost importance, such as in the oil refining, petrochemical, oil and gas, chemical, power generation, and pharmaceutical industries, providing stable power for safety-critical systems.
8311 Series Control System Power Supply: The 8311 series is a high-density power module, suitable for scenarios where space is limited but high power reliability is required. For instance, in compact industrial automation equipment or small control systems, it can provide 24VDC power to electronic devices within a confined space. Additionally, the 8311N is commonly used in the Triconex Trident Safety Instrumented System (SIS), applicable to safety control in industries such as oil and gas, chemical, power, steel, and pharmaceuticals.
8312 Control system power supply: It features a triple-redundancy architecture, suitable for high-risk industries such as chemical, oil and gas, power, and nuclear power. It can be used in safety instrumented systems such as fire alarm systems, gas leak detection systems, and emergency shutdown systems, providing stable DC 24V power to various modules within the system.
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Please provide a detailed introduction to the working principle of the TRICONEX Invensys power supply
As the core power supply component of industrial safety-critical systems (such as Safety Instrumented System (SIS), Emergency Shutdown System (ESD), etc.), the TRICONEX Invensys power supply operates around three core objectives: stable power supply, redundancy fault tolerance, and safety protection. It meets the stringent requirements of industrial environments, providing reliable power support for control systems. The following provides a detailed introduction from two aspects: general principles and key technical features:
1. General working principle: power conversion and regulation from input to output
The basic workflow of the TRICONEX power supply is similar to that of industrial-grade power supplies, following the logic of “input → conversion → voltage stabilization → output → protection”. However, it has enhanced stability and redundancy design for safety-critical scenarios. The specific steps are as follows:
Input voltage adaptation
Receiving external power supply (such as AC 115V/230V, DC 24V, etc., with different models corresponding to different input ranges), the rectifier circuit converts alternating current (AC) into direct current (DC), or performs preliminary filtering on the DC (for DC input models), eliminating high-frequency noise and fluctuations in the input voltage.
Power conversion and voltage stabilization
The initially processed voltage is converted into a stable output voltage required by the system (such as DC 5V, 24V, etc., depending on the specific model) through a DC-DC conversion circuit (such as high-frequency switching power supply technology). In this step, a precise feedback control circuit (such as pulse width modulation (PWM) technology) is used to adjust the output in real time, ensuring voltage accuracy (typically within ±1%) and avoiding the impact of input voltage fluctuations or load changes.
Redundancy and fault tolerance design
Most TRICONEX power supplies adopt a dual-redundant or triple-redundant architecture (such as the triple-redundant design of the T8231 series), where multiple independent power modules work in parallel to share the load. When one module fails, the remaining modules automatically assume the entire load, avoiding system power failure. The redundant switching process is bumpless (switching time < ms level), ensuring continuous operation of the control system.
Output protection mechanism
In response to potential anomalies (such as short circuits, overloads, and overvoltages) that may occur in industrial environments, the power supply is equipped with multiple built-in protection functions:
Short circuit protection: When the output terminal is short-circuited, the power supply automatically cuts off the output or limits the current to prevent the module from being burned out; it automatically recovers after the fault is eliminated.
Overload protection: When the load exceeds the rated power, the power supply employs current limiting or shutdown protection to prevent damage caused by long-term overload.
Overvoltage protection: When the output voltage rises abnormally, the protection circuit is triggered to cut off the output, preventing the back-end control modules (such as CPUs, I/O cards) from being damaged due to overvoltage.
Standby power supply switching (for some models)
Some high-end models (such as 8312) are equipped with built-in backup batteries (such as lithium-ion batteries). When the external main power supply is interrupted, the battery immediately and seamlessly switches to supply power, ensuring that the control system does not lose data or malfunction within a short period of time (usually ≥20ms), thus gaining time for emergency handling.
II. Principle support for key technical characteristics and scenario adaptation
The working principle of the TRICONEX power supply is closely related to its application scenarios, and its core technical characteristics determine its applicability in different scenarios:
Wide voltage input range (such as the 8310 series supporting 85-140VAC/95-180VDC): adapts to unstable power supply environments in industrial sites (such as remote oil fields, chemical parks), avoiding system anomalies caused by voltage fluctuations.
Hot-swap function (such as T8231): The power module can be replaced online without affecting system operation during the replacement process, which is suitable for scenarios requiring continuous production (such as oil refining and nuclear power), reducing downtime for maintenance.
High-density design (such as 8311N): Provides high power output within a limited space, adapts to compact control systems (such as small SIS), and meets the power supply needs of space-constrained scenarios (such as ships and on-board control equipment).
Three-redundancy architecture (such as T8231): Three independent power modules work simultaneously, and the failure of any one module does not affect the system, meeting SIL3 safety level requirements and suitable for high-risk scenarios such as explosions and toxic substance leaks (e.g., chemical reactor control).
summarize
The working principle of TRICONEX Invensys power supply is essentially a combination of “stable conversion + redundancy fault tolerance + safety protection”: ensuring stable output through precise power conversion technology, eliminating the risk of single point failure through redundancy design, and responding to abnormal situations through multiple protection mechanisms, ultimately providing “zero interruption” power guarantee for industrial safety-critical systems. The differences between different series (such as input voltage, redundancy level, power density) are precisely targeted optimizations based on the general principle, tailored to meet the requirements of power supply reliability, space, and safety level in different scenarios.
