Using a sensor or interlock to safeguard equipment is a necessary part of any machinery guarding system, but it is only one part of that system. A simple circuit includes a safety interlock switch and ...

Relays and contactors use a variety of technologies to switch signals and power connections. Many devices called relays use similar techniques and topologies, but the terminology can be confusing.

Specifically designed for the HVACR industry, definite purpose (DP) contactors are electrically operated switching devices. They are used for switching a power or control circuit, and are typically ...