When designing a PLC control panel, one of the fundamental decisions is how to provide overcurrent protection for I/O modules. Should each I/O module be fused with a single fuse, or should each I/O point be fused individually? Here are 11 things to consider when deciding how and when to fuse I/O points.
Professional engineering licensure for control system designers, engineers, and integrators is always a topic that can bring forth heated arguments both for and against licensure. The purpose of this article is to put forth the facts and let the readers determine if professional engineer (PE) designed control systems are a requirement for their systems and...
ISA84 is not a "cook book" or "prescriptive standard," but rather a "performance standard" for a general approach plant owners can use for each phase of a safety instrumented system over its lifecycle.