With today’s number of customizable available options, selecting the right emergency stop (e-stop) for process equipment can be a daunting task, but it’s critical for overall safety. According to human-machine-interface (HMI) experts at EAO Corp., Shelton, CT, fitting equipment with a highly functional e-stop in line with the basic application design concept, versus a lesser-certified safety switch, is key. MT
Determine if your application requires Category 0 or Category 1 shutdown.
This is crucial in the placement, size, electrical specifications, mechanical characteristics, color, and number of required e-stops.
Research international and North American standards, performance ratings, and codes that govern your application (see table below).
Each industry has unique regulatory standards. These restrictions may govern factors such as size, color, and contact terminals.
Select the product.
Choose your e-stop based on design factors to meet industry demands and international compliance. Proper selection involves understanding market and application requirements, environmental conditions, and electrical demands.
Vendors often provide a variety of unique features to enhance your e-stop and complete virtually any application. It’s important to research these additions as some accessories may be mandated by industry standards.
Consult an expert.
Many suppliers offer consultative services to assist customers throughout the process of selecting and integrating their HMI needs, from individual e-stops to completely designed and produced ‘mixed technology’ solutions.
For more information on e-stops and other HMI components and systems, visit www.eao.com.