TRICONEX DO 3626X 控制系统模块

TRICONEX DO 3626X  控制系统模块 

TRICONEX DO 3626X  控制系统模块 

TRICONEX DO 3626X执行安全仪表功能(SIF)。在安全完整性等级(SIL)中，SIS被认为具有一定的可靠性。所需的SIL由定量工艺危害分析(PHA)确定，例如保护层分析(LOPA).SIL要求在SIS的设计、施工、安装和运行过程中得到验证。可以通过设计评审、工厂验收测试、现场验收测试和常规功能测试来验证所需的功能。

TRICONEX DO 3626X正式的危险识别流程由项目团队工程师和其他专家在流程各部分(称为操作单元)的工程设计阶段完成时执行。该团队对已完成的工程设计中的每个潜在危险点或“节点”进行系统、严格的程序审查。这种审查及其产生的文件被称为HAZOP研究。HAZOP研究通常揭示需要SIF采取进一步风险缓解措施的危险场景。通过保护层分析(LOPA)或其他认可的方法，完整性等级是在各自的场景中为SIF定义的。完整性等级可分为安全完整性等级(SIL)或环境完整性等级(EIL)。基于HAZOP研究建议和SIF的IL等级；每个单元操作的工程设计(包括BPCS和SIF设计)已经完成。

SIS旨在执行特定的控制功能，以防止不可接受或危险条件发生时出现不安全的工艺操作。

安全仪表系统必须独立于所有其他系统控制系统控制相同的设备，以确保SIS功能不受损害。[2]SIS由相同类型的控制元件组成(包括传感器,逻辑解算器,执行器和其他控制设备)作为基本过程控制系统(BPCS)。然而，安全仪表系统中的所有控制元件都专用于安全仪表系统的正常运行。

TRICONEX DO 3626X安全仪表系统的基本特征是由检测过程变量是否超过预设限值的仪表、处理该信息并作出决策的逻辑解算器以及对过程采取必要措施以达到安全状态的最终控制元件组成。[3]一个例子是温度传感器，其向控制器提供信号，该控制器将所感测的过程温度与期望的温度设定点进行比较，并且向紧急开关阀致动器发送信号，如果过程温度超出不安全的界限，则该紧急开关阀致动器停止加热流体向过程的流动。

SIS执行的特定控制功能称为安全仪表功能(SIF)。它们是作为整体的一部分实现的降低风险旨在最大限度地降低先前确定的事故可能性的策略，事故范围从轻微的设备损坏到能量或材料的失控灾难性释放。

TRICONEX DO 3626X  控制系统模块 

TRICONEX DO 3626X Digital input module SIS control system

The TRICONEX DO 3626X performs the Safety Meter function (SIF). At the Safety Integrity Level (SIL), SIS is considered to have a certain level of reliability. The SIL required is determined by a quantitative process hazard analysis (PHA), such as a protective layer analysis (LOPA).SIL requirements are validated during the design, construction, installation and operation of SIS. Desired functionality can be verified through design reviews, factory acceptance tests, field acceptance tests, and general functional tests.

The TRICONEX DO 3626X formal hazard identification process is performed by project team engineers and other experts at the completion of the engineering design phase of each part of the process, known as the operational unit. The team conducts a systematic, rigorous procedural review of each potential hazard point or "node" in the completed engineering design. This review and the resulting documents are known as HAZOP studies. HAZOP studies often reveal hazardous scenarios that require further risk mitigation measures by the SIF. Through protective layer analysis (LOPA) or other recognized methods, the integrity level is defined for the SIF in the respective scenario. Integrity levels can be classified as Safety Integrity Level (SIL) or Environmental Integrity Level (EIL). IL rating based on HAZOP study recommendations and SIF; The engineering design of each unit operation, including BPCS and SIF designs, has been completed.

SIS is designed to perform specific control functions to prevent unsafe process operations when unacceptable or hazardous conditions occur.

The safety instrumentation system must control the same equipment independently of all other system control systems to ensure that SIS function is not compromised. [2]SIS consists of the same type of control elements (including sensors, logic solvers, actuators, and other control devices) as the basic process control system (BPCS). However, all control elements in the safety instrument system are dedicated to the proper operation of the safety instrument system.

The basic features of the TRICONEX DO 3626X safety instrumentation system are composed of instrumentation that detects whether a process variable exceeds a preset limit, a logical solver that processes that information and makes a decision, and a final control element that takes the necessary measures for the process to reach a safe state. [3] An example is a temperature sensor that provides a signal to a controller that compares the perceived process temperature to the desired temperature set point and sends a signal to an emergency on-off valve actuator that stops the flow of heating fluid to the process if the process temperature exceeds an unsafe limit.

The specific control function performed by SIS is called the Safety Instrument Function (SIF). They are risk-reduction strategies achieved as part of a holistic approach designed to minimize the likelihood of previously identified accidents, ranging from minor equipment damage to uncontrolled catastrophic releases of energy or materials.

TRICONEX DO 3626X  控制系统模块