Integrated Machine Safety – or Not!

How will the 2011 updated NFPA 79, Electrical Standard for Industrial Machinery, affect arguments for and against a fully integrated architecture for safety and general control?

12/03/2010


J.B. TitusWe’ve all heard lots of arguments both for and against a fully integrated architecture for safety and general control. In the process world they’ve maintained a separate SIS (Safety Instrumented System) solution for safety creating a separate layer in their architecture for performing the safety functions. However, in the machine world when PLCs were introduced in the 1970’s, standards groups rushed to exclude PLCs from anything safety because the early technology wasn’t very reliable. Guess what happened?

Right, “anything safety” had to be hard wired relegating the safety functions to a separate layer and typically electromechanical devices. This is how the machinery world continued to live for thirty years until 2002 when NFPA 79 changed allowing hardware / software devices designed, tested, and listed for safety applications. This change in the standard opened the door for options in technology, engineering, and design. And, most importantly, the door opened for the option to integrate safety during the design phase vs adding safety to a machine usually on the plant floor. This new option to integrate safety allows machine safety technology and functions to join the rest of the architecture and enjoy all of the time tested efficiencies and cost savings brought by the innovation of machine control technology. Hard guards, hard wiring, and interfaced devices are now just an option, not the norm!

Control Engineering System IntegrationSo, should I integrate machine safety or not?

 

To answer this question, I recommend that you evaluate your application and consider your options. Evaluate your risk assessment, the identified hazards, and what’s required to mitigate the identified hazards to tolerable levels per the industrial standards and regulations. Does your current approach to machine safety result in nuisance or intermittent machine down time? Are you getting diagnostics from your safety controls or machine guards? Do you need to reduce costs and improve productivity? Check out the related articles below because “layered” safety and “integrated” safety are now options for you to consider along with your company’s safety policy, manufacturing objectives, and business model.

INTEGRATED SAFETY COULD BE YOUR OPPORTUNITY – CONSIDER IT!

 

As a side note – The 2011 updated NFPA 79, Electrical Standard for Industrial Machinery, was previously expected for release this month. The schedule was recently modified and the current expected release date is June, 2011.  

Submit your ideas, experiences, and challenges on this subject in the comments section below. Click on the following text if you don't see a comments box, then scroll down: Integrated Machine Safety – Or Not! 

Related articles:

How To Integrate Safety

Machine safety pays off

Contact: www.jbtitus.com for “Solutions for Machine Safety”.



The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
A new approach to the Skills Gap; Community colleges may hold the key for manufacturing; 2017 Engineering Leaders Under 40
Doubling down on digital manufacturing; Data driving predictive maintenance; Electric motors and generators; Rewarding operational improvement
2017 Lubrication Guide; Software tools; Microgrids and energy strategies; Use robots effectively
The cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Power system design for high-performance buildings; mitigating arc flash hazards
Research team developing Tesla coil designs; Implementing wireless process sensing
Commissioning electrical systems; Designing emergency and standby generator systems; Paralleling switchgear generator systems

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
The maintenance journey has been a long, slow trek for most manufacturers and has gone from preventive maintenance to predictive maintenance.
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.
Maintenance Manager; California Oils Corp.
Associate, Electrical Engineering; Wood Harbinger
Control Systems Engineer; Robert Bosch Corp.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me