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ISA: International Society of Automation

ISA, the International Society of Automation, is a nonprofit organization that develops and publishes standards guiding the field of industrial automation. Headquartered near Raleigh, United States, ISA standards are spread throughout the world by its 30,000 members, located in nearly 100 countries. In addition to developing ISA standards, ISA also runs two certification programs and provides a range of educational opportunities. Standards from ISA are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: [email protected] or 1-212-642-4980 or Request Proposal Price.

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ANSI/ISA 18.2-2016

Management of Alarm Systems for the Process Industries

This standard specifies general principles and processes for the lifecycle management of alarm systems based on programmable electronic controller and computer-based human-machine interface (HMI) technology for facilities in the process industries. It covers all alarms presented to the operator through the control system, which includes alarms from basic process control systems, annunciator panels, packaged systems (e.g., fire and gas systems, and emergency response systems), and safety instrumented systems.

ANSI/ISA 101.01-2015

Human Machine Interfaces for Process Automation Systems

This standard addresses Human Machine Interfaces for equipment and automated processes. If the standard, recommended practices and methodology are followed, the result should enable the users to be more effective yielding improved safety, quality, productivity and reliability.

ANSI/ISA 71.04-2013

Environmental Conditions for Process Measurement and Control Systems: Airborne Contaminants

This standard covers airborne contaminants and biological influences that affect industrial process measurement and control equipment, electronic office equipment, and data center and network equipment. Specific examples of electronic office equipment include: laptop computers, desktop computers, workstations, servers, data storage hardware, terminals, displays, laser and inkjet printers, copiers, and fax machines. Examples of data center equipment include: servers, switches, routers, displays, keyboards, data storage hardware, power distribution equipment, and climate control equipment such as heating, ventilating, and air-conditioning (HVAC). Some examples of networking equipment include telecommunications hardware, switches, and routers.

ANSI/ISA 12.12.01-2015

Nonincendive Electrical Equipment for Use in Class I and II, Division 2 and Class III, Divisions 1 and 2 Hazardous (Classified) Locations

The purpose of this standard is to provide minimum requirements for the design, construction, and marking of electrical equipment or parts of such equipment for use in Class I and Class II, Division 2 and Class III, Divisions 1 and 2 hazardous (classified) locations. This equipment, in normal operation, is not capable of causing ignition of the surrounding atmosphere under the conditions prescribed in this standard, although the equipment may contain electronic components used in an incendive circuit and may also have field wiring that is an incendive circuit. In addition, it is the intent of this document to establish uniformity in test methods for determining the suitability of the equipment and associated circuits and components as they relate to potential ignition of a specific flammable gas or vapour-in-air mixture, combustible dust, easily ignitible fibers, or flyings.

ANSI/ISA 5.1-2009

Instrumentation Symbols and Identification

This standard is intended to meet the different procedures of various users who need to identify and graphically depict measurement and control equipment and systems. These differences are recognized when they are consistent with the objectives of this standard, by providing alternative symbol and identification methods.


Machine and Unit States: An implementation example of ANSI/ISA-88.00.01

Since its inception, the OMAC Packaging Machine Language (PackML) group has been using a variety of information sources and technical documents to define a common approach, or machine language, for automated machines. The primary goals are to encourage a common ôlook and feelö across a plant floor, and to enable and encourage industry innovation. The PackML group is recognized globally and consists of control vendors, OEMÆs, system integrators, universities, and end users, which collaborate on definitions that endeavour to be consistent with the ISA88 standards and consistent with the technology and the changing needs of a majority of automated machinery. The term ômachineö used in this report is equivalent to an ISA88 ôunitö.

ISA TR101.02-2019

HMI Usability and Performance

This ISA technical report (TR) addresses the specification, design, implementation details, and management (recommended practices) of an HMI (Human-Machine Interface) focused on usability and performance. It explains how the ANSI/ISA-101.01-2015 standard (called hereafter ISA-101) applies to determining the best solution in order to achieve the process goals using examples that have been shown to be effective. The ISA-101 standard covers the HMI lifecycle, including all general concepts until its decommissioning, applying a practical and management approach. The purpose of having an automated process is to enhance process operations based on safety, performance, process improvements, availability, repeatability, and other relevant factors. HMIs are the main interface for users to interact with the process itself and they have the opportunity to facilitate operation or confuse users. This TR was written to provide guidance for the use of the ISA-101 standard as it applies to usability and performance, with due consideration to other guidance documents that have been developed throughout industry. Refer to clause 2 for references to these documents. HMI enhancements for improved usability and performance are often associated with additional specifications, custom design, implementation, and management considerations, in addition to vendor-provided functionality and features. This technical report is intended to include examples of these considerations within the HMI lifecycle, including the continuous work processes of audit, validation, and management of change (MOC).

ANSI/ISA TR12.13.03-2009

Guide for Combustible Gas Detection as a Method of Protection

Combustible gas detection used for process safety management may also be used to provide protection from explosion or fires by minimizing the possibility of an accumulation of combustible gases reaching ignitable levels. Criteria are developed to establish combustible gas levels to initiate alarms, initiate increase in ventilation rates and to initiate shutdown of processes to shutoff the flow of combustible gas that has breached containment. It is the intent of this document to compile and refine techniques for the use of combustible gas sensors and controllers to monitor and control sources of combustible gas release into the atmosphere within designated spaces. It is also the intent that these products and techniques be adapted by industries and used with processes that have historically not employed combustible gas detection as a method of protection.

ANSI/ISA 95.00.01-2010 (IEC 62264-1 Mod)

Enterprise-Control System Integration - Part 1: Models and Terminology

This standard describes the interface content between manufacturing operations and control functions and other enterprise functions. The interfaces considered are the interfaces between Levels 3 and 4 of the hierarchical model defined by this standard. The goals are to increase uniformity and consistency of interface terminology and reduce the risk, cost, and errors associated with implementing these interfaces. The standard can be used to reduce the effort associated with implementing new product offerings. The goal is to have enterprise systems and control systems that inter-operate and easily integrate. The scope of this standard is limited to

  1. a presentation of the scope of the manufacturing operations and control domain;
  2. a discussion of the organization of physical assets of an enterprise involved in manufacturing;
  3. a listing of the functions associated with the interface between control functions and enterprise functions; and
  4. a description of the information that is shared between control functions and enterprise functions.


As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.