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Safety manual for Fisher® 4660 HighLow

Pressure Pilot for Safety Instrumented System

(SIS) Solutions

When the Fisher 4660 highlow pressure pilot is used in a Safety Instrumented System (SIS) the design process should

follow a safety lifecycle as described in several international standards (IEC61508, ANSI/ISA 84.01, etc.) The following

must be thoroughly reviewed and implemented as part of the safety lifecycle. This is in addition to regular installation

procedures and warnings listed in the latest version of the Fisher 4660 highlow pressure pilot instruction manual

(D200163X012).

WARNING

This instruction manual supplement is not intended to be used as a stand-alone document. It must be used in conjunction

with the following manual:

Fisher 4660 HighLow Pressure Pilot Instruction Manual (D200163X012).

Failure to use this instruction manual supplement in conjunction with above referenced manual could result in personal

injury or property damage. If you have any questions regarding these instructions or need assistance in obtaining this

document, contact your Emerson Process Management sale office.

A. Definitions, Acronyms and Abbreviations

1. FIT  Failure In Time (1x10

9

failures per hour)

2. FMEDA 

Failure Modes, Effects, and Diagnostics Analysis

3. Low Demand Mode  Mode, where the demand interval for operation mode on a safetyrelated system is greater

than twice the proof test interval.

4. PFD

AVG

 average Probability of Failure on Demand

5. SIF  Safety Instrumented Function

6. SIL  Safety Integrity Level

7. SIS  Safety Instrumented System

B. Related Literature

1. D200163X012  Fisher 4660 HighLow Pressure Pilot (Instruction Manual)

2. Exida FMEDA Report for Fisher 4660 HighLow Pressure Pilot  Report no. EPM 12/06089 R001

C. Product/ System Properties

1. The product is a highlow pressure pilot that activates emergency shutdown systems. It can be used with either a

single or dual set point capability to maintain full output pressure when the process is operating within the set point

range.

Instruction Manual Supplement

D103776X012

4660 Pressure Pilot

August 2013

1 2 3 4

Inhaltsverzeichnis

Seite 1 - (SIS) Solutions

www.Fisher.comSafety manual for Fisher® 4660 HighLowPressure Pilot for Safety Instrumented System(SIS) SolutionsWhen the Fisher 4660 highlow pressur

Seite 2 - Instruction Manual Supplement

Instruction Manual SupplementD103776X0124660 Pressure PilotAugust 201322. The fail safe state for the 4660 pressure pilot is with zero output pressur

Seite 3 - WARNING

Instruction Manual SupplementD103776X0124660 Pressure PilotAugust 201333. A conservative approach is taken in estimating the service interval for the

Seite 4

Instruction Manual SupplementD103776X0124660 Pressure PilotAugust 20134Emerson Process Management Marshalltown, Iowa 50158 USASorocaba, 18087 BrazilCh

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