Emerson Fisher 4660- User Manual
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www.Fisher.com
Safety manual for Fisher
®
4660 HighLow
Pressure Pilot for Safety Instrumented System
(SIS) Solutions
When the Fisher 4660 highlow 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 highlow 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 HighLow 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 safetyrelated 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 HighLow Pressure Pilot (Instruction Manual)
2. Exida FMEDA Report for Fisher 4660 HighLow Pressure Pilot Report no. EPM 12/06089 R001
C. Product/ System Properties
1. The product is a highlow 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
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