UFC760BE1142 3BHE0Q4573R1142 ABB Servo driver module

Product Details

Product Description

Product Description
UFC760BE1142 3BHE0Q4573R1142 ABB Servo driver module
UFC760BE1142 3BHE0Q4573R1142 ABB Servo driver module
Our Email: 2235954483@qq.com
contact number:13313705507
contacts：HE
• Consideration of conditions (process phases, process upset, shutdowns) • Determination of requirements for additional risk reduction • Assumptions made during analysis (demand rates, failure rates, operational constraints or human intervention) • Description of measures taken to reduce hazards and risk • Allocation of safety functions to layers of protection • Identification of safety instrumented functions It may be necessary to perform Hazard and Risk assessment at several stages of the project. The hazard and risk assessment shall be recorded in such a way that relationship between the above items is clear and traceable. The extent of risk reduction necessary will vary depending on application, legal requirements and on an evaluation of the cost-value achievement. Allocation of Safety Functions In order to determine the need for a SIS and its SIL, it is necessary to consider what other protection layers exist and their level of protection. The Allocation of Safety Functions is necessary input for the subsequent phases of engineering a SIS. The Risk Reduction Factor shall be determined for the different layers of protection. The Allocation process shall also include allocation of Safety Instrumented Functions to individual SIS and subsystems. From the allocation process the Risk Reduction Factor (RRF) requirement will be derived for the Safety Instrumented Functions (SIF). The SIL for the Safety Instrumented Functions shall be set taking into account the required RRF. The Safety Integrity Level requirement is related only to the complete Safety Instrumented Function that is defined and allocated for the actual identified hazard. The distinction between Risk and Safety Integrity should be noted. Risk is a measure of the frequency and consequence of a specified hazardous event. Safety Integrity is a measure of the likelihood that the SIF (or other protection functions) will provide the specified safety function when demanded.

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