Can emergency stop devices that a prone to unintended operation be guarded? Find out!Read More
This article explores the requirements for safety related control systems meeting ISO 13849 – 1 Category 2 requirements. “Gotcha!” points in the definition are highlighted to help designers avoid this common pitfalls.Read More
Five things that most machine builders fail to do. With a Sixth Bonus failure!Read More
This article expands on the first in the series “Interlock Architectures – Pt. 1: What do those categories really mean?”. Learn about the basic circuit architectures that underlie all safety interlock systems under ISO 13849 – 1, and CSA Z432 and ANSI RIA R15.06.Read More
In 1995 CEN published an important standard for machine builders – EN 954 – 1, Safety of Machinery – Safety Related Parts of Control Systems – Part 1: General Principles for Design. This standard set the stage for defining control reliability in machinery safeguarding systems, introducing the Reliability categories that have become ubiquitous. So what do these categories mean, and how are they applied under the latest machinery standard, ISO 13849 – 1?Read More
Did you know that interlocked gates require stopping performance testing?
Machinery needs to be able to stop in the time it takes a person to open the guard and reach the hazard. If the distance from the guard opening to the hazard is short enough that a person can reach the danger point before the hazard can be controlled, the guard is useless. The resulting situation may be worseRead More
This short article discusses ways to test emergency stop systems on machines.Read More
The machinery world continues to wait for the European Commission to reveal the new Mandatory Implementation Date for EN ISO 13849 – 1.Read More
In recent posts I’ve been discussing the changes in the use of EN 954 – 1, Safety of Machinery – Safety Related Parts of Control Systems. Part 1: General Principles for Design. The EU originally announced that this standard was to be withdrawn on 31-Dec-09, being replaced by EN ISO 13849 – 1. As you may know, there are significant differences in these two standards.
A later announcement from the European Commission repealedRead More
Update on EN ISO 13849 – 1 mandatory implementation date.Read More