Pepperl fuchs 2011 Emerson Global Users Exchange Intrinsically Safe CHARMS Session 8-2387

Application of the Intrinsically Safe CHARMS Modules for Project Savings Session ID: 8-2387

Presenters
Not pictured : Klaus Erni

Introduction
Application of the Intrinsically Safe CHARMS Modules
Intrinsic Safety Basics
IS CHARMS
Application of IS for DeltaV Systems
Application of IS CHARMS

You Are All Familiar With Emerson’s Electronic Marshalling Controllers Various busses Wireless I/O Electronic Marshalling

Electronic Marshalling Structure & Definitions
Fast Facts
Electronic Marshalled I/O
Types
CHARMS available today
AI 4-20 mA HART
AO 4-20 mA HART
DI NAMUR
DI 24 VDC Low Side
DO 24 VDC High Side
Thermocouple/mV
RTD
Voltage 0-10 VDC
Rules
8 Base Plates per CIOC
12 Terminal Blocks per Base Plate
96 CHARMS per CIOC
Install in Div 2 or Zone 2
CHARMS CIOC Carrier CIOC (Redundant) Terminal Block Base Plate CHARM Electronic Marshalling

Background on Hazardous Locations An area containing (or likely to contain) an ignitable concentration of flammable gas or vapor, where an electrical spark of sufficient power will cause an explosion. HAZARDOUS NOT HAZARDOUS

Hazardous Location Explosion Triangle
All three must be present to cause an ignition
Basis for most protection methods
Eliminate one and the operation is safe
Oxidizer Fuel (Air) (Gas, Vapor or Dust) Energy (Thermal or Electrical) E x

Hazardous Locations & Protection – Examples Class I ; Division 1 ; Groups A,B,C,D ; T6 Permitted Class Permitted Division Gas Groups Temperature Class Zone 1 , Ex ib IIB T6 Gas Groups Temperature Class Type(s) of Protection Permitted Zone Defined by FM & ANSI/ISA Defined by IEC & CENELEC Traditionally Zones have been in Europe Traditionally Divisions have been in the US

Intrinsic Safety – Methods of Protection
Methods of protection in hazardous environments
Containment, e.g. Explosion Proof, Ex d
Contains an explosion (at the electronics) within an enclosure or housing; prevents the explosion from propagating outside the enclosure to the process area
Segregation, e.g. Purge/Pressurization, Ex p
Prevents the Oxidizer and Fuel from coming into contact with the electronics
Prevention, e.g. Intrinsic Safety, Ex i (e.g. Ex ia, Ex ib, Ex ic)
Prevents the Energy at the electronics from being high enough to cause an explosion
Intrinsic Safe ty has emerged as the preferred method of protection in most world areas

Protection Methods

Comparison of Protection Methods

Intrinsic Safety: Basic Concept An intrinsically safe circuit consists of the following: - Intrinsically Safe Equipment - Interconnecting Wire - Associated Apparatus Intrinsically Safe Equipment Associated Apparatus Associated Apparatus

Ignition Curves
Intrinsically safe circuits operate below the minimum ignition point during normal and abnormal operation with a 50% safety factor
Relevant standards
UL913
FM3610
CSA C22.2 No. 157
ISA 12.2.01
IEC 60079-11

Explosion Prevention Via Intrinsic Safety
Intrinsic Safety “ i ”, example Ex ia
Divisions 1, 2 / Zones 0, 1, 2
Intrinsic Safety Characteristics
A low power technique is used to limit voltage, current, and stored energy to a level below the minimum required for ignition during both normal AND abnormal operation of the equipment under consideration.
Hazardous Area V R L C Isc/Io 3x Voc/Uo Barrier Cable + -

When to use Intrinsic Safety
Intrinsic Safety circuits are used when field devices are located in hazardous environments; they protect the circuit by limiting the energy to the field devices.
Field devices can be located in hazardous environments that are rated
Zone 0, Zone 1, or Zone 2
Class I Division 1 or Class 1 Division 2
Protection levels for the circuits could be
Ex ia, Ex ib, or Ex ic
Circuits will have defined parameters for Voltage, Current, Power, Capacitance, and Inductance

When IS is not a Good Fit...
Some plants are geographically dispersed meaning that the presence of explosive hazards for any period of time is unlikely.
Some plants do not have the possibility of explosive mixtures being present
If your customer already uses Explosive Proof methods, they are unlikely to adopt IS in the same facility
In North America, IS is not typically used.
This is changing slowly. Some US plants with IS include
3M
Bayer
BASF

Intrinsic Safety Protection
Lower initial cost
Conduit not required; poured seals not required
Any suitable enclosure is acceptable in Div 2
Reduced cost of ownership (maintenance, calibration, repair)
Use of simple apparatus offers flexibility
Suitable for all gasses
Permits live maintenance; lowers cost and increases safety
Accepted globally
Can only be used for low power
Cable parameters must be considered for IS applications in loop proofing
Perceived to be complex
Advantages Disadvantages

Intrinsic Safety Applications NOTE: For Hazardous Environment applications, Intrinsic Safety is easier to understand and easier to apply; however, where Intrinsic Safety methods of protection will be applied, be sure that you have the proper experience, and please contact Pepperl+Fuchs or Emerson Intrinsic Safety experts NOTE: Intrinsic Safety training and education is recommended and can be made available to you, please contact Pepperl+Fuchs or Emerson Intrinsic Safety experts

How to Achieve Intrinsic Safety with DeltaV
Numerous Options & Applications with Emerson DeltaV
Traditional DeltaV I/O and external Pepperl+Fuchs IS modules
M-Series
S-Series
Emerson Standard CHARMS I/O
Emerson IS CHARMS
DeltaV SIS and external Pepperl+Fuchs IS modules
Via energy limiting devices, IS barriers, that limit energy in the circuit…

Intrinsic Safety “Apparatus” – Traditional
Associated Apparatus provides the protection
Intrinsic Safety Approved Apparatus are the field devices
Approved Apparatus Connecting Cable Associated Apparatus DCS, e.g. DeltaV Hazardous Area Approval Focus Area

Intrinsic Safety “Apparatus” – IS CHARMS
Associated Apparatus provides the protection
Intrinsic Safety Approved Apparatus are the field devices
Approved Apparatus Connecting Cable Associated Apparatus DCS, e.g. DeltaV More details later in presentation!! Hazardous Area Approval Focus Area

How to Achieve Intrinsic Safety with DeltaV
IS barriers can be external isolators
IS barriers can be embedded with DCS I/O as in the case of IS CHARMS
Via energy limiting devices, IS barriers, that limit energy in the circuit… External IS Barriers IS CHARMS Traditional IS modules from Pepperl+Fuchs IS CHARMS from Emerson inside

External P+F IS Isolating Barriers
Only a few channels of IS needed
OR
Customer preference for redundant, multi-channel traditional I/O cards in S-series
OR
DetlaV SIS requires external IS barriers
OR
Customer preference for external IS barriers due to experience, spares, standard operating practice, etc.
OR
Emerson has opted to sell M-series or Ovation to the customer
Via energy limiting devices, IS barriers, that limit energy in the circuit… Adding External IS Isolating Barriers to DeltaV or DeltaV SIS DeltaV S-series Hazardous Area

Intrinsic Safety with Traditional I/O DeltaV M-series DeltaV S-series Via energy limiting devices, IS barriers, that limit energy in the circuit… Adding External IS Isolating Barriers to DeltaV or DeltaV SIS Hazardous Area Hazardous Area

Intrinsic Safety with Traditional I/O Via energy limiting devices, IS barriers, that limit energy in the circuit… Many wires!! Too much cabinet space DeltaV S-series Hazardous Area

Intrinsic Safety with Standard CHARMS I/O Via energy limiting devices, IS barriers, that limit energy in the circuit… CHARMS DeltaV S-series External IS Barriers Cables, labels, associated drawings, and installation/checkout in FAT can cost more than DCS I/O channel hardware or an external IS barrier/isolator. Hazardous Area

Now IS CHARMs are Available Controllers Various busses Wireless I/O Electronic Marshalling

Intrinsic Safety & Emerson IS CHARMS
Makes it EASY!!
Combines Emerson I/O CHARMS and Pepperl+Fuchs Intrinsic Safety Barrier technologies into a single, small, integrated package … IS CHARMS
Associated Apparatus
inside

IS CHARMS – Integrated I/O & IS Protection
Fast Facts
I/O plus IS protection
IS protection plus galvanic isolation
Types
IS CHARMS available 4Q 2011
AI 4-20 mA HART
AO 4-20 mA HART
DI NAMUR
DO 11V @45mA VDC High Side
IS CHARMs available 3Q 2012
Thermocouple/mV
RTD
Rules
8 Base Plates per CIOC
12 Terminal Blocks per Base Plate
96 IS CHARMS per CIOC
Install in Div 2 or Zone 2
Can mix Standard CHARMS Base Plates with IS CHARMS Base Plates
IS CHARMS CIOC Carrier CIOC (Redundant) IS Terminal Block IS Base Plate IS CHARM inside

Intrinsic Safety with IS CHARMS I/O Via energy limiting devices, IS barriers, that limit energy in the circuit… IS barriers built into IS CHARMS!! IS CHARMS
Smaller Footprint
Less Design
Lower Project Costs
Long Term Benefits
Emerson Unique
DeltaV S-series IS CHARMS replaces many wires with 2 wires! Hazardous Area

Why the IS CHARMS Solution?
Project Benefits
Smaller cabinet footprint, than external IS barriers
Less Design
Fewer cabinets; smaller cabinets
Fewer drawings
Fewer wires to connect and label
Easy last minute project changes
Lowest Total Installed Cost
Long Term Customer Benefits
One warranty. One company responsible.
Falls under standard Emerson life cycle plan
Fewer points of failure (screw terminal reduction)
Highest availability with single point integrity
Fewer spares
Less maintenance and inspection requirements
Higher safety and availability
Emerson is unique in this offering; others cannot compete

IS CHARMS Replace IS Barriers IS CHARMS 120 I/O CONVENTIONAL IS BARRIERS 120 I/O

Cost Comparison – Business Results Achieved IS CHARMS CONVENTIONAL IS BARRIERS

Intrinsic Safety with DeltaV SIS I/O DeltaV SIS DeltaV S- or M-series Via energy limiting devices, IS barriers, that limit energy in the circuit… Adding External IS Isolating Barriers to DeltaV or DeltaV SIS BPCS Hazardous Area SIS Hazardous Area

Summary
Discussed Intrinsic Safety Basics
Discussed Application of the Intrinsically Safe CHARMS Modules for Project Savings
Use of IS CHARMS reduces project cost and improves safety
Questions??

Where To Get More Information
Attend Short Course Session ID: 4-2391 “Intrinsic Safety Fundamentals & IS CHARMS”
Attend Emerson DeltaV Roadmap
Visit us in the exhibition hall for a live demos
www.pepperl-fuchs.us Order a Free: Pepperl+Fuchs Interface Technology Engineer’s Guide [email_address]

Pepperl fuchs 2011 Emerson Global Users Exchange Intrinsically Safe CHARMS Session 8-2387

by Kristen_Barbour_PF

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