If the power source is a listed Class 2 transformer or listed Class 2 power supply — or it’s in listed equipment marked to identify the Class 2 power source — you’ve got a Class 2 circuit between the ...

A new type of device provides designers of automated installations for North America with performance, cost, and safety benefits. Industrial machinery and equipment system designs typically rely on ...

In last month's “Code Basics” article, starting on page 56 of the September issue, we spent most of our time discussing Class 1 circuits. Now, it's time to switch gears and focus on Class 2 and 3.

The brand-new Class 197 trains will offer increased passenger capacity, reduced emissions and enhanced onboard comfort. The new Class 197 trains began passenger service on the Conwy Valley route by ...

CRISPR–Cas systems form two major classes that differ in the organization of their effector modules. The effector modules of class 2 systems consist of a single large protein, which makes them the ...