1. ISA-SP84 Update: Functional Safety
Bill Johnson, E.I. DuPont
Chairman, ISA-SP84

2. ISA-SP84
Programmable Electronic Systems for Use in Safety Applications
Membership: > 280 safety experts from user, supplier, and consulting companies across the processing and related industries
Augmented by safety experts from key government and academic organizations
Organized into several working groups – reflected in documents published and in development (as described in the following)

3. ISA-SP84 Milestones
ANSI/ISA (IEC Modified) Parts 1-3: Functional Safety: Safety Instrumented Systems for the Process Industry Sector
Modification / adoption of IEC Parts 1-3.
Key change: addition of Grandfather Clause.
Official notification (Nov. 2005) that the standards may be used in seeking compliance with OSHA 29 CFR regulations pertaining to the prevention and mitigation of accidents involving highly hazardous chemicals.

4. ISA-SP84 Milestones – cont.
Two major ISA technical reports completed in 2005 to illustrate and promote the proper application of the three-part series of standards:
ISA-TR Part 1: Guideline on the Implementation of ANSI/ISA Parts 1-3 (IEC Mod)
ISA-TR Part 2: Example Implementation of ANSI/ISA Parts 1-3 (IEC Mod)
Outstanding effort by ISA-SP84 Working Group 2 – led by Dr. Angela Summers

5. ISA-SP84: Work in Progress
ISA-TR Safety Fieldbus Design Considerations for Process Industry Sector Applications
First committee ballot completed September Many comments received – will be revised for a second ballot.
ISA-SP84 Working Group 1 – Bob Adamski

6. ISA-SP84: Work in Progress – cont.
ISA-TR The Application of ANSI/ISA ‑2004 Parts 1-3 (IEC Modified) for Safety Instrumented Functions (SIFs) in Burner Management Systems.
Target for first committee ballot: December 2006.
ISA-SP84 Working Group 3 – Dennis Zetterberg

7. ISA-SP84: Work in Progress – cont.
ISA-SP84 Working Group 6: Fire and Gas
Spin-off of BMS Working Group.
Meeting this week in Houston – developing reliability model to address differences between preventive and mitigative instrumented functions.
Leaders: Mike Scott and Bob Seitz.

8. ISA-SP84: Work in Progress – cont.
ISA-SP84 Working Group 4: Electro-Magnetic Compatibility (EMC) Issues for Safety Instrumented Systems.
Collecting information on current industry practices.
Leader: Tim Layer

9. ISA-SP84: Work in Progress – cont.
Update / Maintenance: ISA-TR , Parts 1-5.
Safety Instrumented Functions (SIF) – Safety Integrity Level (SIL) Evaluation Techniques.
Working Group meeting this week in Houston.
Leaders: Angela Summers and Larry Suttinger

10. ISA-SP84: Work in Progress – cont.
Update / Maintenance: ISA-TR
Guidance for Testing of Process Sector Safety Instrumented Functions (SIF) implemented as or within Safety Instrumented Systems (SIS)
Initial Working Group meeting this week in Houston
Leader: K. V. Gandhi

11. ISA-SP84 Outreach
Key technical leadership and expertise provided to international standards development – most notably IEC and IEC 61511
Close working relationship with ISA-SP91, Criticality Ranking for Instrumentation
Chairman: Richard Dunn
Close working relationship with ISA Safety Technical Division

12. We Value Your Input Questions on ISA-SP84? Ideas / Suggestions?
To get involved, contact:
Charley Robinson, ISA Standards,